BLACKROCK NORTH AMERICAN GOVERNMENT INCOME TRUST INC
N-30D, 1998-07-02
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- --------------------------------------------------------------------------------
            THE BLACKROCK NORTH AMERICAN GOVERNMENT INCOME TRUST INC.
                       SEMI-ANNUAL REPORT TO SHAREHOLDERS
                          REPORT OF INVESTMENT ADVISER
- --------------------------------------------------------------------------------


                                                                    May 31, 1998

Dear Shareholder:

      Domestic  bonds  provided  investors  with modest total returns during the
past six months,  as interest rates generally  fell.  Supporting the bond market
was favorable inflation news and the belief that the Federal Reserve is unlikely
to raise short-term interest rates in the immediate future.

      U.S.  economic  growth has remained  relatively  robust,  spurred by lower
interest rates and strong consumer  demand.  However,  the economic  weakness of
Asia looms large.  While the fallout from the Asian fiscal  crisis  probably has
yet to  materialize  in the U.S., we expect a "slowdown" in Asia's  economies to
slow U.S.  growth in 1998.  While we expect that  interest  rates will be fairly
stable in the  near-term,  our  longer-term  outlook for the bond market remains
optimistic,  based on the fundamentally  favorable backdrop of low inflation,  a
currently high level of real yields, and declining Treasury borrowing.

      As you may know, the five investment  management  firms that comprised the
PNC Asset Management  Group have  consolidated  under BlackRock,  resulting in a
$118  billion  money  management  firm.  We look  forward  to using  our  global
investment management expertise to present exciting investment  opportunities to
closed-end fund shareholders in the future.

      This report  contains  comments from your Trust's  managers  regarding the
markets and  portfolio  in addition to the Trust's  financial  statements  and a
detailed  portfolio listing.  We thank you for your continued  investment in the
Trust.

Sincerely,

/s/ Laurence D. Fink                  /s/ Ralph L. Schlosstein
- --------------------                  -------------------------
Laurence D. Fink                      Ralph L. Schlosstein
Chairman                              President


                                       1

<PAGE>

                                                                    May 31, 1998

Dear Shareholder:

      We are pleased to present the  semi-annual  report for The BlackRock North
American  Government  Income Trust Inc.  ("the  Trust") for the six months ended
April 30,  1998.  We would like to take this  opportunity  to review the Trust's
stock price and net asset value (NAV) performance, summarize market developments
in the  United  States  and  Canada  and  discuss  recent  portfolio  management
activity.

      The Trust is a  non-diversified,  actively  managed  closed-end  bond fund
whose shares are traded on the New York Stock  Exchange  under the symbol "BNA".
The Trust's  investment  objective is to provide high monthly income  consistent
with the preservation of capital.  The Trust seeks its objective by investing in
Canadian and U.S.  dollar-denominated  investment grade fixed income securities,
with  approximately 65% of the Trust's assets to be Canadian  dollar-denominated
securities (primarily Canadian provincial debt, Canadian Treasury securities and
Canadian  mortgage-backed  securities).  The U.S.  portion of the  portfolio  is
expected  to consist  primarily  of  mortgage-backed  securities  backed by U.S.
Government  agencies  (such as Fannie Mae,  Freddie Mac or Ginnie Mae) and, to a
lesser extent, U.S. Government securities, asset-backed securities and privately
issued  mortgage-backed  securities.  All of the Trust's assets must be rated at
least  "BBB" by  Standard & Poor's or "Baa" by Moody's at time of purchase or be
issued or guaranteed by the Canadian or U.S.governments or their agencies.

      The table below  summarizes the performance of the Trust's stock price and
NAV over the period:

<TABLE>
<CAPTION>
                                   -------------------------------------------------------
                                    4/30/98   10/31/97     CHANGE       HIGH        LOW
<S>                                <C>        <C>          <C>        <C>        <C>
- -------------------------------------------------------------------------------------------
  STOCK PRICE                      $10.5625   $10.5625       --       $10.8125   $10.4375
- -------------------------------------------------------------------------------------------
  NET ASSET VALUE (NAV)             $12.45     $12.47      (0.16)%     $12.62     $12.17
- -------------------------------------------------------------------------------------------
  CURRENCY EXCHANGE RATE           $0.6993    $0.7095      (1.44)%     $0.7152    $0.6821
- -------------------------------------------------------------------------------------------
  10-YEAR U.S. TREASURYNOTE          5.67%      5.83%      (0.16)%      5.96%      5.36%
- -------------------------------------------------------------------------------------------
</TABLE>

THE U.S. AND CANADIAN FIXED INCOME MARKETS

      The first four months of 1998 have witnessed  continued rapid expansion of
the U.S.  economy.  GDP  growth  is  estimated  at an annual  rate of 4.2%,  far
exceeding  the  historical  non-inflationary  level of 2%.  Despite  the  strong
economic growth,  inflation stayed surprisingly subdued.  After rising only 1.7%
in 1997,  inflation inched higher at a 0.2% annual rate for the first quarter of
1998.  One  explanation  for the absence of inflation in the U.S.  economy stems
from the aftermath of the Asian crisis. U.S. exports to Asia have slowed,  while
the strength of the dollar caused cheaper Asian imports to flood the U.S. market
and exert downward price pressure on domestic goods.

      The Treasury  market  rallied  during the fourth  quarter of 1997 and into
1998  before  giving  back  some  gains  during  the  past few  months.  For the
semi-annual  period,  the yield of the 10-year Treasury security fell from 5.83%
on October 31, 1997 to 5.67% on April 30, 1998.  The strong  performance  of the
Treasury market was in response to moderating economic growth, low inflation and
a "flight to  quality"  from  investors  seeking a safe  haven in U.S.  Treasury
securities.  Continued  expectations  that the Asian  crisis will slow  economic
growth  and force the Fed to leave the  Federal  funds rate  unchanged  provided
additional  support  to the bond  market.  With  Treasury  supply  waning due to
surplus in the federal budget and increased foreign demand for Treasuries due to
their U.S. government backing and relatively  attractive yields, we anticipate a
positive environment for Treasuries for the balance of 1998.

      After  underperforming  U.S.  Treasuries  in the  fourth  quarter of 1997,
Canadian  bonds  rebounded  in early 1998.  Sharp  declines in world  equity and
currency  markets placed pressure on the Canadian  dollar in late 1997,  causing
the Bank of Canada to continually raise short-term  interest rates in an attempt
to halt Canadian dollar weakness. However, overall economic conditions in Canada
remain favorable. The Bank of Canada estimated that the Asian fiscal crisis will
have only a nominal impact on the Canadian  economy,  since Canadian  exports to
Japan  and the  Asian  region  only  account  for 8% of

                                       2

<PAGE>

total economic output. Additionally, the monetary policies of the Bank of Canada
continue to foster strong growth with annual inflation levels in the 1-2% range.
A projected balanced budget for fiscal year 1998/1999 coupled with a more stable
political  environment  in  Quebec  contributed  to a rally in the  bond  market
towards the end of the period.

THE TRUST'S PORTFOLIO AND INVESTMENT STRATEGY

      BlackRock actively manages the Trust's portfolio holdings  consistent with
BlackRock's  overall market outlook and the Trust's investment  objectives.  The
total  portfolio's  duration  (or  interest  rate  sensitivity)  is  managed  to
approximate the duration of the U.S. 10-year Treasury; this means that for given
a change in interest  rates,  the movement in the Trust's NAV can be expected to
approximate  the price  movement  of the  10-year  Treasury  note.  The  Trust's
Canadian and U.S. holdings are managed as two separate  portfolios.  The Trust's
Canadian exposure has generally  remained between 65% and 75% of the portfolio's
assets;  however,  this  allocation  may be adjusted in relation to  BlackRock's
views and  expectations  regarding  interest  rates and changes in the  currency
exchange  rates  between the U.S.  and  Canadian  dollar.  The  following  chart
compares the Trust's current and October 31, 1997 asset composition:

       ------------------------------------------------------------------------
         COMPOSITION                          APRIL 30, 1998   OCTOBER 31, 1997
       ------------------------------------------------------------------------
       CANADIAN PORTFOLIO ALLOCATION                48%               65%
       ------------------------------------------------------------------------
       Canadian Corporate Bonds                     16%               15%
       ------------------------------------------------------------------------
       Canadian Government Securities                6%               17%
       ------------------------------------------------------------------------
       Ontario                                       6%                8%
       ------------------------------------------------------------------------
       New Brunswick                                 4%                4%
       ------------------------------------------------------------------------
       Canadian Mortgages                            3%                5%
       ------------------------------------------------------------------------
       Saskatchewan                                  3%                3%
       ------------------------------------------------------------------------
       New Foundland                                 3%                3%
       ------------------------------------------------------------------------
       Nova Scotia                                   3%                2%
       ------------------------------------------------------------------------
       Prince Edward Island                          2%                2%
       ------------------------------------------------------------------------
       Quebec                                        1%                4%
       ------------------------------------------------------------------------
       British Columbia                              1%                1%
       ------------------------------------------------------------------------
       Manitoba                                      0%                1%
       ------------------------------------------------------------------------

       ------------------------------------------------------------------------
       U.S. PORTFOLIO ALLOCATION                    52%               35%
       ------------------------------------------------------------------------
       U.S. Government Securities                   24%                9%
       ------------------------------------------------------------------------
       Agency Multiple Class Mortgage
         Pass-Throughs                               8%                4%
       ------------------------------------------------------------------------
       FHA Project Loans                             6%                5%
       ------------------------------------------------------------------------
       Non-Agency Multiple Class Mortgage
         Pass-Throughs                               4%                3%
       ------------------------------------------------------------------------
       Interest Only Mortgage-Backed Securities      3%                4%
       ------------------------------------------------------------------------
       Principal Only Mortgage-Backed Securities     3%                3%
       ------------------------------------------------------------------------
       Inverse-Floating Rate Mortgages               2%                5%
       ------------------------------------------------------------------------
       Agency Mortgage Pass-Throughs                 2%                2%
       ------------------------------------------------------------------------


      The Trust  substantially  reduced its exposure to both Canadian  bonds and
the Canadian dollar during the  semi-annual  period.  Canadian bonds  (primarily
Canadian  Government and Provincials) were sold after  outperforming  their U.S.
counterparts.  For example,  Canadian  bonds  historically  have offered  higher
yields than U.S. Treasuries.  During the period,  however,  Canadian yields have
traded through (lower than) U.S. yields.  Accordingly,  the Trust purchased U.S.
Treasuries,  which we believe offered better relative value.  Within Canada, the
Trust  has  emphasized  longer  maturity  holdings  due to our  belief  that the
Canadian  yield  curve  will  flatten,  a result of longer  maturity  securities
outperforming  shorter  maturity  ones.  Additionally,  the  Trust  reduced  its
currency  exposure  to the  Canadian  dollar  due to our  belief  that  Canadian
short-term  yields are currently too low to support a sustained  Canadian dollar
rally. We will, however, be looking to add Canadian dollar exposure to the Trust
upon opportunity.


                                       3
<PAGE>


      We look  forward to  continuing  to manage  the Trust to benefit  from the
opportunities  available to investors in the fixed income  markets as well as to
maintain the Trust's ability to meet its investment objectives. We thank you for
your  investment in the BlackRock  North American  Government  Income Trust Inc.
Please feel free to contact our marketing center at (800) 227-7BFM (7236) if you
have specific questions which were not addressed in this report.

Sincerely

/s/ Robert S. Kapito                      /s/ Michael P. Lustig
- --------------------------------          ----------------------------------
Robert S. Kapito                          Michael P. Lustig
Vice Chairman and Portfolio Manager       Director and Portfolio Manager
BlackRock Financial Management, Inc.      BlackRock Financial Management, Inc.


- -------------------------------------------------------------------------------
            THE BLACKROCK NORTH AMERICAN GOVERNMENT INCOME TRUST INC.
- -------------------------------------------------------------------------------
Symbol on New York Stock Exchange:                                   BNA
- -------------------------------------------------------------------------------
Initial Offering Date:                                        December 20, 1991
- -------------------------------------------------------------------------------
Closing Stock Price as of April 30, 1998:                         $10.5625
- -------------------------------------------------------------------------------
Net Asset Value as of April 30, 1998:                              $12.45
- -------------------------------------------------------------------------------
Yield on Closing Stock Price as of April 30, 1998 ($10.5625)1:      7.95%
- -------------------------------------------------------------------------------
Current Monthly Distribution per Share2:                            $0.07
- -------------------------------------------------------------------------------
Current Annualized Distribution per Share2:                         $0.84
- -------------------------------------------------------------------------------

1 Yield on Closing Stock Price is  calculated by dividing the current annualized
  distribution per share by the closing stock price per share.
2 The distribution is not constant and is subject to change.

                                       4
<PAGE>

- -------------------------------------------------------------------------------
THE BLACKROCK NORTH AMERICAN
GOVERNMENT INCOME TRUST INC.
PORTFOLIO OF INVESTMENTS
APRIL 30, 1998 (UNAUDITED)
- -------------------------------------------------------------------------------
         PRINCIPAL
          AMOUNT                                                      VALUE
RATINGS*  (000)              DESCRIPTION                             (NOTE 1)
- -------------------------------------------------------------------------------
                   LONG-TERM INVESTMENTS--133.4%
                   UNITED STATES SECURITIES--68.8%
                   MORTGAGE PASS-THROUGHS--11.2%
        $ 9,369++  Federal Home Loan Mortgage Corp.,
                     6.50%, 01/01/28 - 02/01/28 ...............      $ 9,282,050
                   Federal Housing Administration, GMAC,
          2,182      Series 37, 7.43%, 05/01/22 ................       2,243,754
          1,335      Series 44, 7.43%, 08/01/22 ................       1,377,857
          1,660      Series 59, 7.43%, 07/01/21 ................       1,707,765
            726      Series 65, 7.43%, 02/01/23 ................         746,600
                     Merrill,
          2,951      Series 29, 7.43%, 10/01/20 ................       3,033,298
         24,354      Series 42, 7.43%, 09/01/22 ................      25,141,920
          2,252      Reilly, Series B-11, 7.40%,
                     04/01/21 ..................................       2,309,429
          2,317      Westmore Project 8240, 7.25%,
                     04/01/21 ..................................       2,367,000
          2,136    Government National Mortgage
                     Association,
                     8.00%, 04/15/24 - 11/15/25 ................       2,216,361
                                                                     -----------
                                                                      50,426,034
                                                                     -----------
                   MULTIPLE CLASS MORTGAGE
                   PASS-THROUGHS--15.9%
                   Countrywide Funding Corporation,
Aaa       3,240     Series 1993-7, Class 7-AS3,
                     11/25/23 (ARM) ............................       3,240,294
AAA       1,696     Series 1993-10, Class 10-A8,
                     01/25/24 (ARM) ............................       1,594,483
         12,776    DLJ Mortgage Acceptance Corp.,
                    Series 1998-2, Class A1,
                     6.75%, 04/25/28 ...........................      12,648,240
                   Federal Home Loan Mortgage
                    Corp., Multiclass Mortgage
                    Participation Certificates,
          7,500@@   Series 1104, Class 1104-L,
                     06/15/21 ..................................       8,067,375
         10,342     Series 1353, Class 1353-S,
                     08/15/07 (I) ..............................       1,100,416
          4,772     Series 1379, Class 1379-P,
                     08/15/18 (I) ..............................         443,575
          1,225     Series 1590, Class 1590-T,
                     10/15/23 (ARM) ............................         772,420
          1,406     Series 1609, Class 1609-LN,
                     11/15/23 (ARM) ............................       1,262,297
                   Federal Home Loan Mortgage
                    Corp., Multiclass Mortgage
                    Participation Certificates,
          1,165     Series 1988,Class 1988-SB,
                     09/15/27 (ARM) ............................       1,166,712
                   Federal National Mortgage Association,
                    REMIC Pass-Though
                    Certificates,
          5,969    Trust 1989-90, Class 90-E,
                    12/25/19 ...................................       6,370,785
          1,390    Trust 1993-27, Class 27-SE,
                    08/25/23 (ARM) .............................         954,713
            347    Trust 1993-44, Class 44-K,
                    10/25/22 ...................................         346,226
          1,140    Trust 1993-139, Class 139-SY,
                    08/25/23 (ARM) .............................       1,095,548
          2,328    Trust 1993-201, Class 201-SC,
                    10/25/23 (ARM) .............................       2,117,657
          4,005    Trust 1993-210, Class 210-A,
                    01/25/23 ...................................       3,805,625
          3,351++  Trust 1993-224, Class 224-SE
                    11/25/23 (ARM) .............................       2,686,220
          1,550    Trust 1993-256, Class 256-F,
                    11/25/23 (ARM) .............................       1,428,657
          4,921    Trust 1995, Class 1995-10-B,
                    03/25/24 ...................................       4,776,921
          2,100    Trust 1996-14, Class 14-M,
                    10/25/21 ...................................       1,798,776
         23,646    Trust 1997-90, Class 90-M,
                    01/25/28 (I) ...............................       9,569,241
         10,952    Trust 1998-16, Class PK,
                    12/18/21 (I) ...............................       2,053,493
          4,500    Trust 1998-25, Class 25-PG,
                    03/18/22 (I) ...............................       1,046,250
AAA       3,253    PNC Mortgage Securities Corp.,
                    Mortgage Pass Through,
                    Series 1997-6, Class 6-A2, 07/25/27 ........       3,249,885
                                                                     -----------
                                                                      71,595,809
                                                                     -----------
                   COMMERCIAL MORTGAGE
                   BACKED SECURITIE0.7%AAA   8,917 
                   Credit Suisse First Boston
                    Mortgage Corp.,
                    Trust 1997-C1, Class C1-AX,
                    06/20/29 (I/O) .............................         978,045
AAA      19,291    GMAC Commercial Mortgage Securities
                    Inc., Mortgage Certificate
                    Trust 1997-C1, C1-Class X,
                    07/15/27 (I/O) .............................       1,838,676

See Notes to Financial Statements.

                                       5

<PAGE>
- -------------------------------------------------------------------------------
         PRINCIPAL
          AMOUNT                                                      VALUE
RATINGS*  (000)              DESCRIPTION                             (NOTE 1)
- -------------------------------------------------------------------------------

                  COMMERCIAL MORTGAGE
                  BACKED SECURITIE (CONT'D)
AAA    $ 6,110    Morgan Stanley Capital 1 Inc.,
                   Trust 1997-HF1, Class HF1-X,
                   06/15/17 (I/O) ................................  $   537,484
                                                                    -----------
                                                                      3,354,205
                                                                    -----------
                  STRIPPED MORTGAGE-BACKED
                  SECURITIES--8.5%
                  Federal Home Loan Mortgage Corp.,
         4,525++   Series 184, Class 184-IO,
                    12/01/26 (I/O) ...............................    1,193,579
         6,619     Series 1254, Class 1254-Z,
                    4/15/22 (I/O) ................................    1,631,830
         7,500     Series 1434, Class1434-M,
                    12/15/22 (I/O) ...............................    3,892,695
         4,573     Series 1506, Class 1506-L,
                    5/15/08 (I/O) ................................      860,497
         5,787     Series 1570, Class 1570-C,
                    8/15/23 (P/O) ................................    3,731,500
         6,752     Series 1850, Class 1850-SA,
                    2/15/24 (I/O) ................................    1,031,811
         1,636     Series 1857, Class 1857-PB1,
                    12/15/08 (P/O) ...............................    1,419,296
         5,000     Series 1900, Class 1900-SV,
                    8/15/08 (I/O) ................................      870,300
        21,102     Series 1965, Class 1965-SA,
                    3/15/24 (I/O) ................................    2,987,221
        40,020     Series 1968, Class 1968-S,
                    10/15/26 (I/O) ...............................    2,251,128
         7,000     Series 2002, Class 2002-HJ,
                    10/15/08 (I/O) ...............................    1,074,062
         6,297     Series 2009, Class 2009-HJ,
                    10/15/22 (P/O) ...............................    3,693,562
                  Federal National Mortgage Association,
                   REMIC Pass-Though Certificates,
         1,999      Trust 267, Class 1,
                      10/01/24 (P/O) .............................    1,678,847
         2,379      Trust 279, Class 1,
                      7/01/26 (P/O) ..............................    2,003,895
         2,000      Trust G1992-5, Class 5-E,
                      1/25/22 (I/O) ..............................      661,766
         2,321      Trust 1994-22, Class 22-E,
                      1/25/24 (P/O) ..............................    1,915,023
         7,500      Trust 1995-26, Class 26-SW,
                      2/25/24 (I/O) ..............................    1,319,531
         3,321      Trust 1996-38, Class 38-E,
                      8/15/23 (P/O) ..............................    1,966,406
         1,000      Trust 1996-44, Class 44-B,
                      6/25/23 (P/O) ..............................      788,750
        10,224+     Trust 1997-65, Class 65-SG,
                      6/25/23 (I/O) ..............................    1,482,473
         1,890++    Trust 1997-85, Class LE,
                      10/25/23 (P/O) .............................    1,561,612
Aaa      5,755    G. E. Capital Mortgage Services,
                    Trust 1993-13, Class A2,
                     10/25/08 (I/O) ..............................      305,714
                                                                    -----------
                                                                     38,321,498
                                                                    -----------
                  U.S GOVERNMENT AND
                  AGENCY SECURITIES--32.5%
                  Overseas Private Investment Corp.,
           220     6.27%, 05/29/12 ...............................      217,663
           440     6.84%, 05/29/12 ...............................      445,500
         3,544    Small Business Administration,
                   Series 1996-20 K,
                   6.95%, 11/01/16 ...............................    3,649,416
                  U.S. Treasury Notes,
        17,850+    5.75%, 11/30/02 ...............................   17,894,625
        28,350+    6.25%, 6/30/02 ................................   28,939,113
        10,600++   6.375%, 5/15/00 ...............................   10,754,018
           150     6.50%, 5/31/01 ................................      153,609
           610     7.25%, 8/15/04 ................................      658,800
                  U.S. Treasury Bonds,
        57,553++   6.125%, 11/15/27 ..............................   58,883,626
        24,420++   6.25%, 8/15/23 ................................   25,099,120
                                                                    -----------
                                                                    146,695,490
                                                                    -----------
                  Total United States Securities
                   (cost $305,840,937) ...........................  310,393,036
                                                                    -----------
                  CANADIAN SECURITIES--64.6%
                  CORPORATE BONDS--21.7%
A1    C$15,000**  Bell Canada,
                   7.00%, 9/24/27 ................................   11,590,370
                  Canadian Imperial Bank Commerce,
Aa3     25,000     8.25%, 2/14/07 ................................   18,286,304
Aa3      4,500     8.50%, 2/05/07 ................................    3,449,543
Aa3     10,000    Canadian Imperial Bank, Toronto,
                   8.15%, 4/25/11 ................................    8,086,577
A       10,000    Credit Foncier De France,
                   8.50%, 3/12/03 ................................    7,687,374
A1      12,000    Daimler Benz AG,
                   9.50%, 10/30/01 ...............................    9,311,587
A1      10,000    Ford Credit Canada Limited,
                   5.66%, 11/19/01 ...............................    6,994,650
                  Greater Toronto Airport Authority,
A2      15,000     5.95%, 12/03/07 ...............................   10,680,793
A2       5,000     6.45%, 12/03/27 ...............................    3,638,239
BB+     10,000**  Loewen Group Inc.,
                   Series 5, 6.10%,
                   10/01/02 ......................................    6,861,079
A2      15,000    Transport Canada Pipe Lines Limited,
                   6.89%, 8/07/28 ................................   11,264,240
                                                                    -----------
                                                                     97,850,756
                                                                    -----------
                  CANADIAN MORTGAGES--4.1%
         6,960    Conduit Mortgage Obligation
                   6.95%, 9/01/98 ................................    4,864,595
        18,869    NHA Mortgage Backed Securities
                   Corp., Household Trust,
                   7.75%, 6/01/98 ................................   13,452,837
                                                                    -----------
                                                                     18,317,432
                                                                    -----------
                  CANADIAN GOVERNMENT
                  SECURITIES--7.6%
                  Canada Government Bonds,
        25,000     5.75%, 6/01/29 ................................   17,810,763
         4,200     8.00%, 6/01/27 ................................    3,902,406


See Notes to Financial Statements

                                       6

<PAGE>
- -------------------------------------------------------------------------------
         PRINCIPAL
          AMOUNT                                                      VALUE
RATINGS*  (000)              DESCRIPTION                             (NOTE 1)
- -------------------------------------------------------------------------------
      C$15,100    Canadian Treasury Notes,
                   9.00%, 12/01/04 ............................... $ 12,699,016
                                                                   ------------
                                                                     34,412,185
                                                                   ------------
                  CANADIAN PROVINCIAL SECURITIES--31.2%
                  British Columbia--2.0%
        10,000    British Columbia Province,
                   8.50%, 8/23/13 ................................    8,882,129
                                                                   ------------
                  NEW BRUNSWICK--5.3%
                  New Brunswick Province,
        13,000     7.625%, 7/14/00 ...............................    9,501,587
        14,600     10.125%, 10/31/11 .............................   14,393,448
                                                                   ------------
                                                                     23,895,035
                                                                   ------------
                  NEWFOUNDLAND--4.7%
        23,000    Newfoundland Province,
                   8.45%, 2/05/26 ................................   21,020,322
                                                                   ------------
                  NOVA SCOTIA--3.4%
        15,000    Nova Scotia Province,
                   9.60%, 1/30/22 ................................   15,150,005
                                                                   ------------
                  ONTARIO--8.1%
        10,000    Hamilton Wentworth Regional
                   Municipality, 7.00%, 6/06/01 ..................    7,315,641
        25,000    Ontario Province,
                   7.60%, 6/02/27 ................................   21,411,588
        10,000    Toronto Metropolitan Municipality,
                   7.75%, 12/01/05 ...............................    7,863,002
                                                                   ------------
                                                                     36,590,231
                                                                   ------------
                  PRINCE EDWARD ISLAND--2.5%
        13,000    Prince Edward Island Province,
                   8.50%, 10/27/15 ...............................   11,503,766
                                                                   ------------
                  QUEBEC--1.7%
        10,000    Quebec Province,
                   7.50%, 12/01/03 ...............................    7,645,023
                                                                   ------------
                  SASKATCHEWAN--3.5%
        20,000    Saskatchewan Province,
                   7.50%, 12/19/05 ...............................   15,715,375
                                                                   ------------
                                                                    140,401,886
                                                                   ------------
                  Total Canadian Securities
                   (cost $282,105,846) ...........................  290,982,259
                                                                   ------------
                  Total Long-Term Investments
                   (cost $587,946,783) ...........................  601,375,295
                                                                   ------------
                  SHORT-TERM INVESTMENTS--0.4%
                  CALL OPTION PURCHASED--0.4%
        80,000    Interest Rate Swap, 6.20%
                   over 3-month LIBOR,
                   expires 8/13/99
                   (cost $1,194,000) .............................    1,884,000
                                                                   ------------
                  REPURCHASE AGREEMENT--0.0%
           145    State Street Bank & Trust Co., 5.20%,
                   dated 4/30/98, due 5/1/98 in the 
                   amount of $145,021 (cost $145,000,  
                   collateralized by $145,000 
                   US Treasury Note, 6.625% due  
                   7/31/01, value including accrued  
                   interest--$147,335) ...........................      145,000
                                                                   ------------
                  Total Investments--133.8%
                   (cost $589,285,783) ...........................  603,404,295
                  Liabilities in excess of other
                   assets--(33.8%) ............................... (152,515,972)
                                                                   ------------
                  NET ASSETS--100% ............................... $450,888,323
                                                                   ============
                                                                    
     *   Using the higher of Standard &Poor's or Moody's rating.
     **  Private placement restricted as to resale.
     +   Partial principal amount pledged as collateral for reverse 
         repurchase agreements.
     ++  Entire principal amount pledged as collateral for reverse 
         repurchase agreements.
     @@  Entire principal amount pledged as collateral for futures transactions.

- --------------------------------------------------------------------------------
                              KEY TO ABBREVIATIONS
           ARM--Adjustable Rate Mortgage.
           CMO-- Collateralized Mortgage Obligation.
             I--Denotes a CMO with interest only characteristics.  
           I/O--Interest Only.
         LIBOR--London InterBank Offer Rate.
           P/O--Principal Only.
         REMIC--Real Estate Mortgage Investment Conduit.
- --------------------------------------------------------------------------------

See Notes to Financial Statements.

                                       7
<PAGE>


- ------------------------------------------------------------------
THE BLACKROCK NORTH AMERICAN
GOVERNMENT INCOME TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
APRIL 30, 1998 (UNAUDITED)
- ------------------------------------------------------------------

ASSETS
Investments, at value (cost $589,285,783) (Note 1)    $603,404,295
Canadian dollars, at value (cost $318,822) .......         318,822
Cash .............................................          48,164
Receivable for investments sold ..................      22,350,757
Interest receivable ..............................      10,325,835
Interest rate caps, at value
  (amortized cost $2,035,778) (Notes 1 & 3) ......         677,200
Forward currency contracts--amount receivable
   from counterparties ...........................          79,858
                                                      ------------
                                                       637,204,931
                                                      ------------

LIABILITIES
Reverse repurchase agreements (Note 4) ...........     171,324,312
Payable for investments purchased ................      12,686,979
Due to broker-variation margin ...................       1,354,013
Interest Payable .................................         268,159
Investment advisory fee payable (Note 2) .........         224,398
Administration fee payable (Note 2) ..............          37,400
Other accrued expenses ...........................         421,347
                                                      ------------
                                                       186,316,608
                                                      ------------
NET ASSETS .......................................    $450,888,323
                                                      ============
Net assets were comprised of:
   Common stock, at par (Note 5) .................    $    362,071
   Paid-in capital in excess of par ..............     443,708,250
                                                      ------------
                                                       444,070,321

   Undistributed net investment income ...........         687,539
   Accumulated net realized loss on investments ..      (2,116,686)
   Net unrealized appreciation on investments ....      25,024,033
   Accumulated net realized and unrealized
     foreign currency loss .......................     (16,776,884)
                                                     -------------
   Net assets, April 30, 1998 ....................   $ 450,888,323
                                                     =============
NET ASSET VALUE PER SHARE:
   ($450,888,323 / 36,207,093 shares of
   common stock issued and outstanding) ..........   $       12.45
                                                     =============

- --------------------------------------------------------------------
THE BLACKROCK NORTH AMERICAN
GOVERNMENT INCOME TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------

NET INVESTMENT INCOME
Income
Interest (net of premium amortization of
   $1,658,752 and net of interest expense of
   $4,769,686) .................................   $16,518,627
                                                   ------------
Expenses
   Investment advisory .........................      1,341,035
   Administration ..............................        224,506
   Custodian ...................................        136,000
   Reports to shareholders .....................        124,000
   Audit .......................................         42,000
   Directors ...................................         42,000
   Transfer agent ..............................         22,000
   Miscellaneous ...............................         83,597
                                                   ------------
     Total operating expenses ..................      2,015,138
                                                   ------------
   Net investment income .......................     14,503,489
                                                   ------------

REALIZED AND UNREALIZED GAIN (LOSS) ON
INVESTMENTS AND FOREIGN CURRENCY
TRANSACTIONS (NOTE 3)
Net realized gain (loss) on:
   Investments .................................     15,101,449
   Futures .....................................     (1,406,660)
   Short sales .................................       (437,595)
   Written Options .............................       (811,192)
   Foreign currency ............................     (5,305,711)
                                                   ------------
                                                      7,140,291
                                                   ------------
Net change in unrealized appreciation
   (depreciation) on:
   Investments ..................................    (11,412,767)
   Futures ......................................      2,129,256
   Short sales ..................................        529,265
   Written options ..............................      1,509,600
   Interest rate caps ...........................       (347,668)
   Foreign currency .............................        624,434
                                                    ------------
                                                      (6,967,880)
                                                    ------------
Net gain on investments and foreign currency
         TRANSACTIONS ...........................        172,411
                                                    ------------

NET INCREASE IN NET ASSETS
RESULTING FROM OPERATIONS .......................   $ 14,675,900
                                                    ============


See Notes to Financial Statements.

                                       8

<PAGE>


- --------------------------------------------------------------------------------
THE BLACKROCK NORTH AMERICAN
GOVERNMENT INCOME TRUST INC.
STATEMENT OF CASH FLOWS
SIX MONTHS ENDED APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------------------
INCREASE (DECREASE) IN CASH
(INCLUDING FOREIGN CURRENCY)
Cash flows provided by operating activities:
   Interest received ...............................   $  22,792,976
   Operating expenses paid .........................      (1,998,662)
   Interest expense paid on reverse repurchase
     agreements ....................................      (5,284,094)
   Proceeds from disposition of short-term portfolio
     investments including options, net ............         974,141
   Purchases of long-term portfolio investments ....    (450,287,450)
   Proceeds from disposition of long-term
     portfolio investments .........................     481,724,064
   Variation margin on futures .....................       1,987,246
                                                        ------------
   Net cash flows provided by operating activities .      49,908,221
                                                        ------------
Cash flows used for financing activities:
   Decrease in reverse repurchase agreements .......     (34,801,757)
   Cash dividends paid .............................     (15,381,170)
                                                        ------------
   Net cash flows used for financing activities ....     (50,182,927)
                                                        ------------
Net realized and unrealized foreign currency loss ..      (1,699,064)
                                                        ------------
Net decrease in cash and foreign currency ..........      (1,973,770)
Cash and foreign currency, at beginning of period ..       2,340,756
                                                        ------------
Cash and foreign currency, at end of period ........    $    366,986
                                                        ============

RECONCILIATION OF NET INCREASE IN NET
ASSETS RESULTING FROM OPERATIONS TO
NET CASH FLOWS (INCLUDING FOREIGN
CURRENCY) PROVIDED BY OPERATING ACTIVITIES
Net increase in net assets resulting from operations    $ 14,675,900
                                                        ------------
Decrease in investments ............................      41,773,525
Net realized gain ..................................      (7,140,291)
Decrease in unrealized appreciation ................       6,967,880
Decrease in deposits with brokers as

   collateral for investments sold short ...........      39,769,218
Increase in interest receivable ....................        (154,089)
Decrease in receivable for investments sold ........      27,274,041
Increase in receivable for forward

   currency contracts ..............................        (791,450)
Decrease in interest rate caps .....................         569,550
Increase in variation margin payable ...............       1,264,650
Decrease in payable for investments purchased ......     (52,891,357)
Decrease in payable for securities sold short ......     (18,830,624)
Decrease in interest payable .......................        (514,408)
Decrease in payable for call option ................      (2,080,800)
Increase in accrued expenses and other liabilities .          16,476
                                                        ------------
   Total adjustments ...............................      35,232,321
                                                        ------------
Net cash flows provided by operating activities ....    $ 49,908,221
                                                        ============

- --------------------------------------------------------------------------------
THE BLACKROCK NORTH AMERICAN
GOVERNMENT INCOME TRUST INC.
STATEMENTS OF CHANGES
IN NET ASSETS
- --------------------------------------------------------------------------------
INCREASE (DECREASE)                               SIX MONTHS        YEAR
IN NET ASSETS                                       ENDED           ENDED
                                                  APRIL 30,       OCTOBER 31,
                                                    1998            1997
                                                  ---------       ---------
Operations:

   Net investment income ....................  $ 14,503,489     $ 32,136,760

   Net realized gain on investments,
     futures, short sales, written
     options and foreign currency
     transactions ...........................     7,140,291       46,282,519

   Net change in unrealized 
     appreciation (depreciation) 
     on investments, futures, short 
     sales, options, interest rate caps
     and foreign currency ...................    (6,967,880)     (42,981,198)
                                               ------------     ------------ 

   Net increase in net
     assets resulting from
     operations .............................    14,675,900       35,438,081

Dividends and distributions:

   Dividends from net investment
     income .................................   (15,206,676)     (30,413,427)
                                               ------------     ------------ 


   Total increase (decrease) ................      (530,776)       5,024,654

NET ASSETS

   Beginning of period ......................   451,419,099      446,394,445
                                               ------------     ------------

   End of period ............................  $450,888,323     $451,419,099
                                               ============     ============

See Notes to Financial Statements.

                                       9
<PAGE>
- --------------------------------------------------------------------------------
THE BLACKROCK NORTH AMERICAN GOVERNMENT INCOME TRUST INC.
FINANCIAL HIGHLIGHTS (UNAUDITED)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                SIX MONTHS                     YEAR ENDED OCTOBER 31,
                                                   ENDED        --------------------------------------------------
                                              APRIL 30, 1998    1997        1996        1995       1994        1993
                                               ------------     ----        ----        ----       ----        ----
<S>                                              <C>         <C>         <C>          <C>        <C>        <C>    
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period ..........  $ 12.47     $ 12.33     $ 11.36      $ 10.07    $ 12.34    $ 13.13
                                                 --------    --------    --------     --------   --------   --------
   Net investment income (net of interest
 expense of $0.13, $0.22, $0.41, $0.35,
     $0.26, and $0.20, respectively) ..........     0.40        0.89        0.93         0.89       1.09       1.21
   Net realized and unrealized gain (loss)
     on investments and foreign currency
     transactions .............................       --        0.09        0.92         1.37       (2.28)   (0.80)
                                                --------    --------    --------     --------   --------   --------
Net increase (decrease) from investment
 operations ...................................     0.40        0.98        1.85         2.26       (1.19     )0.41
                                                --------    --------    --------     --------   --------   --------
Less dividends and distributions:
   Dividends from net investment income .......    (0.42)      (0.84)      (0.29)          --      (1.03)     (1.20)
   Return of capital distributions ............       --          --       (0.59)       (0.97)     (0.05)        --
                                                --------    --------    --------     --------   --------    -------
       Total dividends and distributions ......    (0.42)      (0.84)      (0.88)       (0.97)     (1.08)     (1.20)
                                                --------    --------    --------     --------   --------   --------
Net asset value, end of period* ............... $  12.45    $  12.47    $  12.33     $  11.36   $  10.07   $  12.34
                                                ========    ========    ========     ========   ========   ========
PER SHARE MARKET VALUE, END OF PERIOD* ........ $10 9/16    $10 9/16    $ 10 1/8     $ 10 1/8   $  9 1/8   $ 12 7/8
                                                ========    ========    ========     ========   ========   ========
TOTAL INVESTMENT RETURN+ ......................    4.03%      13.23%       9.48%       22.88%    (21.62%)     4.68%
RATIOS TO AVERAGE NET ASSETS:
Operating expenses (a) ........................    0.90%+++    0.93%       0.97%        0.96%      1.01%      0.98%
Net investment income .........................    6.51%+++    7.30%       8.24%        8.58%      9.92%      9.72%
SUPPLEMENTAL DATA:
Average net assets (in thousands) ............. $449,493    $440,465    $409,644     $374,975   $397,651   $452,740
Portfolio turnover ............................      85%        146%        151%          78%        70%       155%
Net assets, end of period (in thousands) ...... $450,888    $451,419    $446,394     $411,295   $364,749   $446,614
Reverse repurchase agreements outstanding,
   end of period (in thousands) ............... $171,324    $206,126    $217,135     $202,703   $142,450   $201,122
Asset coverage++ .............................. $  3,632    $  3,190    $  3,056     $  3,028   $  3,561   $  3,221
</TABLE>
- ----------
   * NAV and market value published in THE WALL STREET JOURNAL each Monday.
 (a) The ratios of operating  expenses,  including interest expense,  to average
     net assets were 3.04%+++,  2.74%,  4.63%,  4.34%,  3.36%, and 2.55% for the
     periods indicated above, respectively.
   + Total investment  return is calculated  assuming a purchase of common stock
     at the  current  market  price on the first  day and a sale at the  current
     market  price  on the  last  day of each  period  reported.  Dividends  and
     distributions  are  assumed,  for  purposes  of  this  calculation,  to  be
     reinvested at prices obtained under the Trust's dividend reinvestment plan.
     Total  investment  return does not  reflect  brokerage  commissions.  Total
     returns for periods of less than a full year are not annualized.
  ++ Per $1,000 of reverse repurchase agreement outstanding.
 +++ Annualized.

The information above represents the unaudited operating performance for a share
of common stock  outstanding,  total  investment  return,  ratios to average net
assets and other  supplemental  data,  for each of the periods  indicated.  This
information has been determined based upon financial information provided in the
financial statements and market value data for the Trust's shares.

                       See Notes to Financial Statements.

                                       10
<PAGE>

- --------------------------------------------------------------------------------
THE BLACKROCK NORTH AMERICAN
GOVERNMENT INCOME TRUST INC.
NOTES TO FINANCIAL STATEMENTS (UNAUDITED)
- --------------------------------------------------------------------------------

NOTE 1. ACCOUNTING                  The  BlackRock  North  American   Government
                                    Income Trust Inc., (the "Trust"), a Maryland
corporation, is a non-diversified, closed-end management investment company. The
investment  objective of the Trust is to achieve high monthly income  consistent
with preservation of capital.  The ability of issuers of debt securities held by
the Trust to meet their obligations may be affected by economic  developments in
a specific  country,  industry  or region.  No  assurance  can be given that the
Trust's investment objective will be achieved.

   The following is a summary of significant accounting policies followed by the
Trust.

BASIS OF  PRESENTATION:  The  financial  statements of the Trust are prepared in
accordance with United States generally accepted accounting principles using the
United States dollar as both the functional and reporting  currency.  

SECURITIES  VALUATION:  In valuing the  Trust's  assets,  quotations  of foreign
securities in a foreign currency are converted to U.S. dollar equivalents at the
then current currency value. The Trust values mortgage-backed,  asset-backed and
other debt  securities  on the basis of current  market  quotations  provided by
dealers or pricing  services  approved by the  Trust's  Board of  Directors.  In
determining the value of a particular security, pricing services may use certain
information  with respect to  transactions in such  securities,  quotations from
dealers,  market transactions in comparable  securities,  various  relationships
observed in the market between  securities,  and calculated yield measures based
on valuation  technology  commonly  employed in the market for such  securities.
Exchange-traded  options are valued at their last sales price as of the close of
options  trading on the  applicable  exchanges.  In the  absence of a last sale,
options are valued at the  average of the quoted bid and asked  prices as of the
close of business. Futures contracts are valued at the last sale price as of the
close of the commodities exchange on which it trades unless the Trust's Board of
Directors  determines  that such price does not reflect its fair value, in which
case it will be valued at its fair value as  determined  by the Trust's Board of
Directors.  Any  securities  or other  assets  for  which  such  current  market
quotations  are not readily  available are valued at fair value as determined in
good faith under procedures established by and under the general supervision and
responsibility of the Trust's Board of Directors.

   Short-term securities which mature in 60 days or less are valued at amortized
cost,  if their  term to  maturity  from  date of  purchase  is 60 days or less.
Short-term securities with a term to maturity greater than 60 days from the date
of purchase are valued at current market quotations until maturity.

   In  connection  with  transactions  in  repurchase  agreements,  the  Trust's
custodian takes possession of the underlying collateral securities, the value of
which at least  equals  the  principal  amount  of the  repurchase  transaction,
including  accrued  interest.  To the  extent  that any  repurchase  transaction
exceeds one business day, the value of the collateral is  marked-to-market  on a
daily basis to ensure the adequacy of the collateral. If the seller defaults and
the value of the collateral declines or if bankruptcy  proceedings are commenced
with respect to the seller of the security, realization of the collateral by the
Trust may be delayed or limited. 

OPTION  SELLING/PURCHASING:  When the Trust  sells or  purchases  an option,  an
amount  equal to the  premium  received  or paid by the Trust is  recorded  as a
liability or an asset and is  subsequently  adjusted to the current market value
of the option  written or purchased.  Premiums  received or paid from writing or
purchasing  options  which  expire  unexercised  are treated by the Trust on the
expiration date as realized gains or losses.  The difference between the premium
and the  amount  paid or  received  on  effecting  a  closing  purchase  or sale
transaction, including brokerage commissions, is also treated as a realized gain
or loss. If an option is exercised, the premium paid or received is added to the
proceeds from the sale or cost of the purchase in determining  whether the Trust
has realized a gain or a loss on investment  transactions.  The Trust, as writer
of an option, may have no control over whether the underlying  securities may be
sold  (call) or  purchased  (put) and as a result  bears the  market  risk of an
unfavorable change in the price of the security underlying the written option.

   Options,  when used by the Trust,  help in  maintaining a targeted  duration.
Duration is a measure of the price  sensitivity  of a security or a portfolio to
relative changes in interest rates. For instance, a duration of "one" means that
a portfolio's or a security's price would be expected to change by approximately
one percent  with a one percent  change in interest  rates,  while a duration of
five  would  imply  that the price  would  move  approximately  five  percent in
relation to a one percent change in interest rates.

   Option  selling and  purchasing is used by the Trust to  effectively  "hedge"
positions  so that  changes in interest  rates do not change the duration of the
portfolio  unexpectedly.  In general,  the Trust uses options to hedge a long or
short  position  or an  overall  portfolio  that is longer or  shorter

                                       11
<PAGE>


than the benchmark security. A call option gives the purchaser of the option the
right (but not  obligation)  to buy, and  obligates the seller to sell (when the
option is exercised),  the underlying position at the exercise price at any time
or at a specified time during the option  period.  A put option gives the holder
the right to sell and obligates the writer to buy the underlying position at the
exercise price at any time or at a specified time during the option period.  Put
options can be purchased to effectively  hedge a position or a portfolio against
price  declines if a portfolio is long.  In the same sense,  call options can be
purchased to hedge a portfolio that is shorter than its benchmark  against price
changes. The Trust can also sell (or write) covered call options and put options
to hedge portfolio positions.

   The main risk that is associated with  purchasing  options is that the option
expires without being exercised.  In this case, the option expires worthless and
the premium paid for the option is considered the loss. The risk associated with
writing call options is that the Trust may forego the  opportunity  for a profit
if the  market  value of the  underlying  position  increases  and the option is
exercised. The risk in writing put options is that the Trust may incur a loss if
the  market  value  of the  underlying  position  decreases  and the  option  is
exercised.  In addition,  as with futures  contracts,  the Trust risks not being
able to enter into a closing transaction for the written option as the result of
an illiquid market.

INTEREST RATE SWAPS: In an interest rate swap, one investor pays a floating rate
of interest on a notional principal amount and receives a fixed rate of interest
on  the  same  notional  principal  amount  for  a  specified  period  of  time.
Alternatively,  an investor  may pay a fixed rate and  receive a floating  rate.
Rate swaps were conceived as  asset/liability  management tools. In more complex
swaps, the notional principal amount may decline (or amortize) over time.

   During the term of the swap,  changes in the value of the swap are recognized
as unrealized gains or losses by "marking-to-market" to reflect the market value
of the swap. When the swap is terminated,  the Trust will record a realized gain
or loss  equal to the  difference  between  the  proceeds  from (or cost of) the
closing transaction and the Trust's basis in the contract, if any.

   The Trust is exposed to credit  loss in the event of  non-performance  by the
other party to the interest rate swap.  However,  the Trust does not  anticipate
non-performance by any counterparty.  


SWAP  OPTIONS:  Swap  options are similar to options on  securities  except that
instead of selling or purchasing the right to buy or sell a security, the writer
or  purchaser of the swap option is granting or buying the right to enter into a
previously  agreed  upon  interest  rate swap  agreement  at any time before the
expiration of the option.  Premiums  received or paid from writing or purchasing
options are recorded as liabilities or assets and are  subsequently  adjusted to
the current market value of the option written or purchased.  Premiums  received
or paid from writing or purchasing  options which expire unexercised are treated
by the Trust on the expiration date as realized gains or losses.  The difference
between the  premium  and the amount  paid or  received  on  effecting a closing
purchase or sale transaction, including brokerage commission, is also treated as
a realized gain or loss. If an option is exercised, the premium paid or received
is added to the proceeds  from the sale or cost of the  purchase in  determining
whether the Trust has realized a gain or loss on investment transactions.

   The main risk that is  associated  with  purchasing  swap options is that the
swap option expires  without being  exercised.  In this case, the option expires
worthless and the premium paid for the swap option is considered  the loss.  The
main risk that is  associated  with the  writing of a swap  option is the market
risk of an unfavorable  change in the value of the interest rate swap underlying
the written swap option.

   Swap  options may be used by the Trust to manage the  duration of the Trust's
portfolio  reflecting  the view of the Trust's  management  in the  direction of
interest rates.

FINANCIAL  FUTURES  CONTRACTS:  A futures  contract is an agreement  between two
parties to buy and sell a financial instrument for a set price on a future date.
Initial margin deposits are made upon entering into futures contracts and can be
either  cash or  securities.  During the period the  futures  contract  is open,
changes  in the  value  of the  contract  are  unrealized  gains  or  losses  by
"marking-to-market" on a daily basis to reflect the market value of the contract
at the  end of  each  day's  trading.  Variation  margin  payments  are  made or
received,  depending upon whether unrealized gains or losses are incurred.  When
the contract is closed,  the Trust  records a realized gain or loss equal to the
difference  between the proceeds from (or cost of) the closing  transaction  and
the Trust's basis in the contract.

   Financial  futures  contracts,  when used by the Trust, help in maintaining a
targeted  duration.  Futures  contracts  can be sold to  effectively  shorten an
otherwise longer duration portfolio. In the same sense, futures contracts can be
purchased  to lengthen a portfolio  that is shorter  than its  duration  target.
Thus, by buying or selling futures contracts,  the Trust can effectively "hedge"
positions  so that  changes in interest  rates do not change the duration of the
portfolio unexpectedly.

                                       12
<PAGE>

   The Trust may invest in financial futures contracts primarily for the purpose
of hedging its existing portfolio  securities or securities the Trust intends to
purchase  against  fluctuations in value caused by changes in prevailing  market
interest  rates.  Should  interest  rates move  unexpectedly,  the Trust may not
achieve the  anticipated  benefits of the  financial  futures  contracts and may
realize a loss. The use of futures  transactions  involves the risk of imperfect
correlation in movements in the price of futures  contracts,  interest rates and
the  underlying  hedged  assets.  The Trust is also at risk of not being able to
enter into a closing transaction for the futures contract because of an illiquid
secondary market.  In addition,  since futures are used to shorten or lengthen a
portfolio's  duration,  there is a risk that the portfolio may have  temporarily
performed better without the hedge or that the Trust may lose the opportunity to
realize  appreciation in the market price of the underlying  positions.  

FORWARD CURRENCY  CONTRACTS:  The Trust enters into forward  currency  contracts
primarily to facilitate settlement of purchases and sales of foreign securities.
A forward  contract is a commitment to purchase or sell a foreign  currency at a
future date (usually the security  transaction  settlement date) at a negotiated
forward  rate.  In the event that a security  fails to settle  within the normal
settlement  period, the forward currency contract is renegotiated at a new rate.
The gain or loss arising from the difference between the settlement value of the
original and renegotiated  forward  contracts is isolated and is included in net
realized losses from foreign currency transactions.  Risks may arise as a result
of the  potential  inability  of the  counterparties  to meet the terms of their
contract.

   Forward  currency  contracts,  when used by the  Trust,  help to  manage  the
overall exposure to the foreign currency backing many of the investments held by
the Trust (the Canadian dollar).  Forward currency contracts are not meant to be
used to eliminate all of the exposure to the Canadian dollar,  rather they allow
the Trust to limit its exposure to foreign  currency within a narrow band to the
objectives of the Trust.  

FOREIGN CURRENCY TRANSLATION: Canadian dollar ("C$") amounts are translated into
United States dollars on the following basis:

     (i) market value of investment securities, other assets and liabilities--at
     the New York City  noon  rates of  exchange.  

     (ii) purchases and sales of investment securities,  income and expenses--at
     the  rates  of  exchange   prevailing  on  the  respective  dates  of  such
     transactions.

   The Trust  isolates  that portion of the results of  operations  arising as a
result of changes in the foreign  exchange rates from the  fluctuations  arising
from changes in the market prices of securities held at year end. Similarly, the
Trust  isolates  the  effect of  changes  in  foreign  exchange  rates  from the
fluctuations  arising from changes in the market prices of portfolio  securities
sold during the year.

   Net realized and unrealized  foreign  exchange losses of $16,916,448  include
realized  foreign  exchange  gains  and  losses  from  sales and  maturities  of
portfolio  securities,  maturities of reverse  repurchase  agreements,  sales of
foreign  currencies,  currency  gains or losses  realized  between the trade and
settlement dates on securities transactions,  the difference between the amounts
of  interest  and  discount  recorded  on the  Trust's  books  and the US dollar
equivalent  amounts actually received or paid and changes in unrealized  foreign
exchange gains and losses in the value of portfolio  securities and other assets
and liabilities arising as a result of changes in the exchange rate.

   Foreign security and currency transactions may involve certain considerations
and risks not  typically  associated  with those of domestic  origin,  including
unanticipated movements in the value of the Canadian dollar relative to the U.S.
dollar.

   The exchange rate for the Canadian dollar at April 30, 1998 was US$ 0.6993 to
C$1.00.

SHORT SALES: The Trust may make short sales of securities as a method of hedging
potential  price declines in similar  securities  owned.  When the Trust makes a
short  sale,  it may  borrow  the  security  sold  short and  deliver  it to the
broker-dealer  through  which  it made  the  short  sale as  collateral  for its
obligation  to deliver the security upon  conclusion of the sale.  The Trust may
have to pay a fee to borrow the  particular  securities  and may be obligated to
pay over any payments received on such borrowed  securities.  A gain, limited to
the price at which the Trust sold the security short, or a loss, unlimited as to
dollar amount,  will be recognized  upon the  termination of a short sale if the
market price is greater or less than the proceeds originally received.  


SECURITY  LENDING:  The Trust may lend its  portfolio  securities  to  qualified
institutions.  The loans are secured by least equal, at all times, to the market
value of the securities loaned. The Trust may bear the risk of delay in recovery
of, or even loss of rights in, the securities  loaned should the borrower of the
securities fail  financially.  The Trust receives  compensation  for lending its
securities  in the form of interest  on the loan.  The Trust also  continues  to
receive  interest on the securities  loaned,  and any gain or loss in the market
price of the  securities  loaned that may occur during the term of the loan will
be for the  account of the Trust.  

                                       13
<PAGE>

INTEREST  RATE CAPS:  Interest  rate caps are  similar to  interest  rate swaps,
except  that one party  agrees to pay a fee,  while  the  other  party  pays the
excess, if any, of a floating rate over a specified fixed or floating rate.

   Interest  rate caps are  intended to both manage the  duration of the Trust's
portfolio and its exposure to changes in short term rates.  Owning interest rate
caps reduces the  portfolio's  duration,  making it less sensitive to changes in
interest rates from a market value  perspective.  The effect on income  involves
protection from rising short term rates,  which the Trust experiences  primarily
in the form of leverage.

   The Trust is exposed to credit  loss in the event of  non-performance  by the
other party to the interest  rate cap.  However,  the Trust does not  anticipate
non-performance by any counterparty.

   Transactions  fees paid or received by the Trust are  recognized as assets or
liabilities  and amortized or accreted into interest  expense or income over the
life of the interest rate cap. The asset or liability is  subsequently  adjusted
to the current market value of the interest rate cap purchased or sold.  Changes
in the value of the interest rate cap are  recognized  as  unrealized  gains and
losses.  

INTEREST  RATE FLOORS:  Interest rate floors are similar to interest rate swaps,
except  that one party  agrees to pay a fee,  while  the  other  party  pays the
deficiency, if any, of a floating rate under a specified fixed or floating rate.

   Interest rate floors are used by the Trust to both manage the duration of the
portfolio  and its exposure to changes in  short-term  interest  rates.  Selling
interest rate floors reduces the portfolio's duration,  making it less sensitive
to changes  in  interest  rates from a market  value  perspective.  The  Trust's
leverage  provides  extra income in a period of falling  rates.  Selling  floors
reduces some of that advantage by partially monetizing it as an up front payment
which the Trust receives.

   The Trust is exposed to credit  loss in the event of  non-performance  by the
other party to the interest rate floor.  However,  the Trust does not anticipate
non-performance by any counterparty.

   Transactions  fees paid or received by the Trust are  recognized as assets or
liabilities  and amortized or accreted into interest  expense or income over the
life of the interest rate floor. The asset or liability is subsequently adjusted
to the  current  market  value of the  interest  rate floor  purchased  or sold.
Changes in the value of the interest  rate floor are  recognized  as  unrealized
gains and  losses.  

SECURITIES   TRANSACTIONS  AND  INVESTMENT  INCOME:  Security  transactions  are
recorded  on the trade  date.  Realized  and  unrealized  gains and  losses  are
calculated  on the  identified  cost basis.  Interest  income is recorded on the
accrual  basis,  and  the  Trust  accretes  discount  or  amortizes  premium  on
securities  purchased using the interest method.  Dividend income is recorded on
the ex-dividend date.

TAXES:  For  Federal  income  tax  purposes,  substantially  all of the  Trust's
Canadian  transactions  are  accounted  for  using  the  Canadian  dollar as the
functional  currency.  Accordingly,  only  realized  currency  gains and  losses
resulting from the  repatriation of Canadian  dollars into United States dollars
are recognized for tax purposes.

   No provision  has been made for United  States income or excise taxes because
it is the  Trust's  policy to continue  to meet the  requirements  of the United
States Internal Revenue Code applicable to regulated investment companies and to
distribute   all  of  its  taxable   income  to   shareholders.   

DIVIDENDS  AND  DISTRIBUTIONS:   The  Trust  declares  and  pays  dividends  and
distributions  monthly from net investment income,  realized  short-term capital
gains and other sources,  if necessary.  Net long-term capital gains, if any, in
excess  of  loss  carryforwards  may  be  distributed  annually.  Dividends  and
distributions are recorded on the ex- dividend date.

   Income  distributions  and  capital  gain  distributions  are  determined  in
accordance with income tax regulations which may differ from generally  accepted
accounting  principles.  

ESTIMATES:  The preparation of financial statements in conformity with generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that  affect the  reported  amounts of assets and  liabilities  and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements  and the  reported  amounts  of  revenues  and  expenses  during  the
reporting   period.   Actual   results   could  differ  from  those   estimates.

RECLASSIFICATION  OF  CAPITAL  ACCOUNTS:  The  Trust  accounts  for and  reports
distributions  to  shareholders  in  accordance  with the American  Institute of
Certified  Public  Accountants'  Statement  of  Position  93-2:   Determination,
Disclosure,  and Financial  Statement  Presentation of Income,  Capital Gain and
Return of Capital  Distributions  by  Investment  Companies.  For the six months
ended April 30, 1998 the Trust decreased  undistributed net investment income by
$78,946,  decreased  accumulated  net realized losses on investments by $44,401,
and decreased  accumulated  net realized and  unrealized  foreign  currency gain
(loss) by $34,545 for realized  foreign  currency losses incurred during the six
months ended April 30, 1998. Net investment  income,  net realized gains and net
assets were not affected by this change.

                                       14
<PAGE>

NOTE 2. AGREEMENTS                  The   Trust  has  an   Investment   Advisory
                                    Agreement    with    BlackRock     Financial
Management,  Inc.  (the  "Adviser"),  a  wholly-owned  corporate  subsidiary  of
BlackRock  Advisors,  Inc.,  which is an indirect  majority-owned  subsidiary of
PNCBank, N.A., and an Administration  Agreement with Prudential Investments Fund
Management LLC ("PIFM"), an indirect,  wholly-owned subsidiary of The Prudential
Insurance Co. of America.

   The  investment  advisory  fee paid to the  Adviser  is  computed  weekly and
payable  monthly at an annual  rate of 0.60% of the Trust's  average  weekly net
assets.  The administration fee paid to PIFM is also computed weekly and payable
monthly at an annual rate of 0.10% of the Trust's average weekly net assets.

   Pursuant to the agreements,  the Adviser provides  continuous  supervision of
the  investment  portfolio and pays the  compensation  of officers of the Trust.
PIFM pays for occupancy and provides certain clerical and accounting services to
the Trust. The Trust bears all other costs and expenses.

NOTE 3. PORTFOLIO                   Purchases    and    sales   of    investment
SECURITIES AND                      securities,  other than  short-term  invest-
OTHER INVESTMENTS                   ments,  for the six months  ended  April 30,
                                    1998     aggregated     $518,677,313     and
$532,762,734,  respectively.  

   The  Trust may  invest  without  limit in  securities  which are not  readily
marketable,  including  those  which  are  restricted  as to  disposition  under
securities law ("restricted securities") although the Trust does not expect that
such investments will generally exceed 5% of its portfolio  assets. At April 30,
1998, the Trust held 1.27% of its portfolio  assets in securities  restricted as
to resale.

   The Trust may from time to time  purchase  in the  secondary  market  certain
mortgage  pass-through  securities  packaged or master  serviced by PNC Mortgage
Securities Corp. (or Sears Mortgage if PNC Mortgage  Securities Corp.  succeeded
to rights and duties of Sears) or mortgage related  securities  containing loans
or mortgages  originated by PNC Bank or its affiliates,  including  Midland Loan
Services,  Inc.  It  is  possible  under  certain  circumstances,  PNC  Mortgage
Securities Corp. or its affiliates,  including Midland Loan Services, Inc. could
have interests  that are in conflict with the holders of these  mortgage  backed
securities,  and such holders could have rights against PNC Mortgage  Securities
Corp. or its affiliates, including Midland Loan Services, Inc.

   The United  States  federal  income tax basis of the Trust's  investments  at
April 30, 1998 was $577,164,809,  and accordingly,  net unrealized  appreciation
for   federal   income  tax   purposes   was   $26,239,486   (gross   unrealized
appreciation-$30,034,562; gross unrealized depreciation-$(3,795,076)).

   For federal income tax purposes, the Trust had a capital loss carryforward at
October 31, 1997 of approximately  $16,593,000 of which approximately $6,816,000
will  expire  in  2002,   approximately  $5,904,000  will  expire  in  2003  and
approximately  $3,873,000  will expire in 2004.  Accordingly,  no capital  gains
distribution  is expected to be paid to  shareholders  until net gains have been
realized in excess of such amounts.

   Details of open financial futures contracts at April 30, 1998 are as follows:

                                     VALUE AT       VALUE AT       UNREALIZED
NUMBER OF              EXPIRATION     TRADE         APRIL 30,     APPRECIATION
CONTRACTS TYPE            DATE        DATE           1998        (DEPRECIATION)
- --------  ----          --------    ---------      --------       -----------
Short positions: 
792  30 Yr. U.S. T-Bond  Jun '98   $95,578,170    $95,213,250      $364,920
125  10 Yr. U.S. T-Note  Jun.'98    14,038,500     14,039,063          (563)
56     Eurodollar        Jun.'98    13,128,306     13,200,600       (72,294)
51     Eurodollar        Sep.'98    11,944,636     12,017,413       (72,777)
51     Eurodollar        Dec.'98    11,929,320     12,005,400       (76,080)
                                                                   --------
                                                                   $143,206
                                                                   ========

   Details of open forward currency contracts at April 30, 1998 are as follows:

                             VALUE AT       VALUE AT
SETTLEMENT    CONTRACT      SETTLEMENT      APRIL 30,    UNREALIZED
   DATE      TO RECEIVE        DATE           1998      APPRECIATION
 ---------    ---------     ---------      ---------     ----------
Purchase:
1/27/98     $25,000,000    $17,434,725    $17,514,583      $79,858

   The Trust  entered into two interest  rate caps.  Under both  agreements  the
Trust  receives the excess,  if any, of a floating  rate over a fixed rate.  The
Trust paid a transaction fee for both  agreements.  Details of the caps at April
30, 1998 are as follows:


NOTIONAL                                                VALUE AT
AMOUNT    FIXED                 TERMINATION     COST/    APRIL 30,   UNREALIZED
 (000)    RATE    FLOATING RATE     DATE       PREMIUM     1998     DEPRECIATION
 -----    ----    -------------     ----       -------     ----     ------------
$25,000   6.00%   3 month LIBOR   2/19/02   $  613,549   $308,200    $ (305,349)
$50,000   7.00%   3 month LIBOR   4/18/03    1,422,229    369,000    (1,053,229)
                                                                    -----------
                                                                    $(1,358,578)
                                                                    ===========

                                       15
<PAGE>

NOTE 4. BORROWINGS                  REVERSE  REPURCHASE  AGREEMENTS:  The  Trust
                                    enters into  reverse  repurchase  agreements
with  qualified,  third  party  broker-dealers  as  determined  by and under the
direction of the Trust's  Board of  Directors.  Interest on the value of reverse
repurchase  agreements  issued and outstanding is based upon competitive  market
rates at the time of  issuance.  At the time the  Trust  enters  into a  reverse
repurchase agreement, it establishes and maintains a segregated account with the
lender  containing liquid high grade securities having a value not less than the
repurchase  price,   including  accrued  interest,  of  the  reverse  repurchase
agreement.

   The average  daily  balance of United States  reverse  repurchase  agreements
outstanding  during  the six  months  ended  April  30,  1998 was  approximately
$40,707,486 at a weighted average interest rate of  approximately  5.49%.  Also,
the average daily balance of Canadian reverse repurchase agreements  outstanding
during the six months ended April 30, 1998 was  approximately  C$72,764,925 at a
weighted average interest rate of 4.26%.

   The maximum amount of total reverse repurchase agreements  outstanding at any
month-end during the period was $171,342,086 as of April 30, 1998, which was 27%
of total assets.

DOLLAR  ROLLS:  The Trust may enter into  dollar  rolls in which the Trust sells
securities  for delivery in the current  month and  simultaneously  contracts to
repurchase  substantially similar (same type, coupon and maturity) securities on
a specified future date.  During the roll period the Trust forgoes principal and
interest paid on the securities. The Trust is compensated by the interest earned
on the cash  proceeds of the initial sale and by the lower  repurchase  price at
the future date

   The average daily balance of dollar rolls  outstanding  during the six months
ended April 30, 1998 was  approximately  $250,804.  The maximum amount of dollar
rolls  oustanding  at any  month-end  during  the period  was  $9,329,016  as of
February 28, 1998, which was 1.48% of total assets.

NOTE 5. CAPITAL                     There  are 200  million  shares  of $.01 par
                                    value  common  stock   authorized.   Of  the
36,207,093 shares outstanding at April 30, 1998, the Adviser owned 7,093 shares.

NOTE 6. DISTRIBUTIONS               Subsequent  to April 30, 1998,  the Board of
                                    Directors  of the Trust  declared  dividends
from  undistributed  earnings  of  $0.07  per  share  payable  May  29,  1998 to
shareholders of record on May 15, 1998.

                                       16
<PAGE>

- --------------------------------------------------------------------------------
            THE BLACKROCK NORTH AMERICAN GOVERNMENT INCOME TRUST INC.
                           DIVIDEND REINVESTMENT PLAN
- --------------------------------------------------------------------------------
      Pursuant  to  the  Trust's  Dividend   Reinvestment   Plan  (the  "Plan"),
shareholders may elect to have all  distributions of dividends and capital gains
automatically reinvested by State Street Bank & Trust Company (the "Plan Agent")
in Trust shares pursuant to the Plan. Shareholders who do not participate in the
Plan will  receive  all  distributions  in cash  paid by check in United  States
dollars mailed directly to the shareholders of record (or if the shares are held
in street or other  nominee  name,  then to the  nominee) by the  custodian,  as
dividend disbursing agent.

      The Plan Agent serves as agent for the shareholders in  administering  the
Plan.  After the Trust  declares a dividend or determines to make a capital gain
distribution,  the Plan Agent will, as agent for the  participants,  receive the
cash payment and use it to buy Trust shares in the open market,  on the New York
Stock Exchange or elsewhere,  for the participants' accounts. The Trust will not
issue shares under the Plan.

      Participants in the Plan may withdraw from the Plan upon written notice to
the Plan Agent and will receive  certificates  for whole Trust shares and a cash
payment for any fraction of a Trust share.

      The Plan Agent's fees for the  handling of the  reinvestment  of dividends
and distributions will be paid by the Trust.  However, each participant will pay
a pro rata share of  brokerage  commissions  incurred  with  respect to the Plan
Agent's open market  purchases in connection with the  reinvestment of dividends
and  distributions.  The automatic  reinvestment of dividends and  distributions
will not relieve participants of any federal income taxes that may be payable on
such dividends or distributions.

      Experience  under  the Plan  may  indicate  that  changes  are  desirable.
Accordingly,  the Trust  reserves  the right to amend or  terminate  the Plan as
applied to any dividend or distribution paid subsequent to written notice of the
change sent to all  shareholders of the Trust at least 90 days before the record
date  for the  dividend  or  distribution.  The  Plan  also  may be  amended  or
terminated  by the Plan  Agent  upon at least 90  days'  written  notice  to all
shareholders  of the Trust.  All  correspondence  concerning  the Plan should be
directed to the Plan Agent at (800) 699-1BFM or BlackRock at (800) 227-7BFM. The
addresses are on the front of this report.

- -------------------------------------------------------------------------------
                             ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------
      There have been no material changes in the Trust's  investment  objectives
or policies that have not been approved by the shareholders or to its charter or
by-laws or in the  principal  risk factors  associated  with  investment  in the
Trust.  There have been no changes in the persons who are primarily  responsible
for the day-to-day management of the Trust's portfolio.

      The Annual Meeting of Trust  Shareholders  was held May 6, 1998 to vote on
      the following matters: 

      (1)  To elect three Directors as follows:

          DIRECTOR                   CLASS             TERM           EXPIRING
          -------                    -----             -----           -------
          Andrew F. Brimmer .......   III             3 years           2000
          Kent Dixon ..............   III             3 years           2000
          Laurence D. Fink ........   III             3 years           2000

          Directors whose term of office continues beyond this meeting are Frank
          J.  Fabozzi,  Ralph L.  Schlosstein,  Walter F.  Mondale,  Richard  E.
          Cavanagh, James Grosfeld, and James Clayburn La Force, Jr.

      (2) To ratify the selection of Deloitte & Touche LLP as independent public
          accountants of the Trust for the fiscal year ending  October 31, 1998.

          Shareholders elected the three Directors and ratified the selection of
          Deloitte & Touche LLP. The results of the voting was as follows:

<TABLE>
<CAPTION>

                                            VOTES FOR       VOTES AGAINST     ABSTENTIONS
                                            --------         -----------      ----------
          <S>                               <C>               <C>               <C>    
          Andrew F. Brimmer ..............  26,955,874             0             833,524
          Kent Dixon .....................  26,989,452             0             799,946
          Laurence D. Fink ...............  26,992,455             0             796,943
          Ratification of Deloitte 
           & Touche LLP ..................  26,979,528          483,177          326,693
</TABLE>


                                       17
<PAGE>

- --------------------------------------------------------------------------------
            THE BLACKROCK NORTH AMERICAN GOVERNMENT INCOME TRUST INC.
                               INVESTMENT SUMMARY
- --------------------------------------------------------------------------------

THE TRUST'S INVESTMENT OBJECTIVE

The  Trust's  investment  objective  is to  manage  a  portfolio  of high  grade
securities  to achieve high  monthly  income  consistent  with  preservation  of
capital.  The Trust will seek to achieve its  objective by investing in Canadian
and U.S. dollar-denominated securities.

WHO MANAGES THE TRUST?

BlackRock  Financial  Management,   Inc.   ("BlackRock")  is  an  SEC-registered
investment  adviser.  BlackRock and its  affiliates  currently  manage over $118
billion  on behalf of  taxable  and  tax-exempt  clients  worldwide.  Strategies
include  fixed  income,  equity and cash and may  incorporate  both domestic and
international   securities.   Domestic  fixed  income  strategies   utilize  the
government,  mortgage,  corporate and municipal bond sectors.  BlackRock manages
twenty-one  closed-end  funds that are traded on either the New York or American
stock  exchanges,  and a $23 billion  family of open-end  equity and bond funds.
Current  institutional  clients  number 334,  domiciled in the United States and
overseas.

WHAT CAN THE TRUST INVEST IN?

The Trust will  invest  primarily  in  securities  issued or  guaranteed  by the
federal   governments  of  Canada  and  the  United  States,   their   political
subdivisions  (which  include the  Canadian  provinces)  and their  agencies and
instrumentalities.  The Trust's investments will be either government securities
or  securities  rated  "BBB" or higher at the time of  investment  by Standard &
Poor's or "A2" by Moody's,  or securities which BlackRock deems as of comparable
quality. Under current market conditions,  it is expected that the percentage of
the Trust's assets  invested in Canadian  dollar-denominated  securities will be
between  65% and 75%.  Examples  of types of  securities  in which the Trust may
invest include  Canadian and U.S.  government or government  agency  residential
mortgage-backed   securities,   privately  issued  mortgage-backed   securities,
Canadian  provincial debt securities,  U.S.  Government  securities,  commercial
mortgage-backed  securities,  asset-backed  securities and other debt securities
issued by Canadian  and U.S.  corporations  and other  entities.  Under  current
market conditions,  BlackRock expects that the primary  investments of the Trust
to be Canadian mortgage-backed securities,  Canadian provincial debt securities,
U.S. government securities,  securities backed by U.S. government agencies (such
as residential  mortgage-backed  securities),  privately issued  mortgage-backed
securities  and  commercial  mortgage-backed  securities.  

WHAT IS THE ADVISER'S INVESTMENT  STRATEGY?

The Adviser will seek to meet the Trust's  investment  objective by managing the
asset of the Trust so as to provide  high  monthly  income  consistent  with the
preservation  of capital.  The Trust will seek to provide monthly income that is
greater  than  that  which  could be  obtained  by  investing  in U.S.  Treasury
securities  with an average  life  similar  to that of the  Trust's  assets.  In
seeking the investment objective,  BlackRock actively manages the Trust's assets
in relation to market  conditions and changes in general economic  conditions in
Canada and the U.S., including its expectations  regarding interest rate changes
and changes in currency  exchange rates between the U.S. dollar and the Canadian
dollar,  to attempt to take advantage of favorable  investment  opportunities in
each country.  As such, the allocation between Canadian and U.S. securities will
change from time to time. Under current market  conditions,  the average life of
the Trust's  assets is expected to be in the range of seven to ten years.  Under
other  market  conditions,  the  Trust's  average  life  may vary and may not be
predictable  using any formula.  While the Adviser has the  opportunity to hedge
against  currency  risks  associated  with  Canadian  securities,  the  Trust is
intended  to  provide  exposure  to  the  Canadian  marketplace.  As  a  result,
historically,  currency  hedging  has not been  widely  practiced  by the Trust.
However,  BlackRock  will  attempt  to limit  interest  rate risk by  constantly
monitoring  the  duration  (or price  sensitivity  with  respect  to  changes in
interest  rates) of the  Trust's  assets so that it is within  the range of U.S.
Treasury  securities  with average lives of seven to ten years. In doing so, the
Adviser will attempt to locate  securities  with better  predictability  of cash
flows such as U.S.  commercial  mortgage-backed  securities.  In  addition,  the
Canadian  mortgage-backed   securities  in  which  the  Trust  invests  are  not
prepayable,  contributing  to the  predictability  of the  Trust's  cash  flows.
Traditional  residential U.S. mortgage pass-through securities make interest and
principal  payments on a monthly basis and can be a source of attractive  levels
of income to the Trust. While the U.S.  mortgage-backed  securities in the Trust
are of high credit quality,  they typically offer a yield spread over Treasuries
due to the  uncertainty of the timing of their cash flows as they are subject to
prepayment  exposure when interest rates change and mortgage  holders  refinance
their  mortgages or move.  While U.S.  mortgage-backed  securities  do offer the
opportunity  for  attractive  yields,  they subject a portfolio to interest rate
risk and  prepayment  exposure  which result in  reinvestment  risk when prepaid
principal  must be reinvested.  

                                       18
<PAGE>

HOW ARE THE TRUST'S  SHARES  PURCHASED  AND SOLD?  DOES THE TRUST PAY  DIVIDENDS
REGULARLY?

The  Trust's  shares are traded on the New York Stock  Exchange  which  provides
investors with  liquidity on a daily basis.  Orders to buy or sell shares of the
Trust must be placed through a registered broker or financial advisor. The Trust
pays monthly  dividends which are typically paid on the last business day of the
month. For shares held in the shareholder's name, dividends may be reinvested in
additional shares of the Trust through the Trust's transfer agent,  State Street
Bank & Trust Company.  Investors who wish to hold shares in a brokerage  account
should check with their financial  advisor to determine  whether their brokerage
firm offers dividend reinvestment services. 

LEVERAGE CONSIDERATIONS IN THE TRUST

Under current  market  conditions,  leverage  increases the income earned by the
Trust.  The  Trust  employs  leverage  primarily  through  the  use  of  reverse
repurchase  agreements  and dollar rolls.  Leverage  permits the Trust to borrow
money at short-term  rates and reinvest that money in  longer-term  assets which
typically offer higher interest  rates.  The difference  between the cost of the
borrowed funds and the income earned on the proceeds that are invested in longer
term assets is the benefit to the Trust from leverage. In general, the portfolio
is typically  leveraged at approximately  33 1/3% of total assets.  

Leverage also increases the duration (or price  volatility of the net assets) of
the Trust,  which can improve the  performance  of the fund in a declining  rate
environment,  but can cause net  assets to decline  faster  than the market in a
rapidly rising rate environment.  BlackRock's  portfolio  managers  continuously
monitor and  regularly  review the  Trust's  use of  leverage  and the Trust may
reduce,  or unwind,  the amount of leverage  employed should BlackRock  consider
that   reduction  to  be  in  the  best   interest  of   shareholders.  

SPECIAL CONSIDERATIONS AND RISK FACTORS RELEVANT TO THE TRUST

THE TRUST IS  INTENDED  TO BE A  LONG-TERM  INVESTMENT  AND IS NOT A  SHORT-TERM
TRADING VEHICLE.

INVESTMENT  OBJECTIVE.  Although  the  objective of the Trust is to provide high
monthly  income  consistent  with  preservation  of  capital,  there  can  be no
assurance that this objective will be achieved.

DIVIDEND  CONSIDERATIONS.  The income and dividends paid by the Trust are likely
to vary over time as fixed income market conditions change. Future dividends may
be higher or lower than the dividend the Trust is currently paying.

CURRENCY  EXCHANGE RATE  CONSIDERATIONS.  Because the Trust's net asset value is
expressed in U.S. dollars, and the Trust invests a substantial percentage of its
assets in Canadian  dollar-denominated  assets,  any change in the exchange rate
between these two  currencies  will have an effect on the net asset value of the
Trust. As a result, if the U.S. dollar appreciates  against the Canadian dollar,
the Trust's net asset value would decrease if not offset by other gains.

LEVERAGE.  The Trust utilizes leverage through reverse repurchase agreements and
dollar rolls,  which  involves  special  risks.  The Trust's net asset value and
market value may be more volatile due to its use of leverage.

MARKET PRICE OF SHARES.  The shares of closed-end  investment  companies such as
the Trust trade on the New York Stock  Exchange  (NYSE symbol:  BNA) and as such
are subject to supply and demand influences.  As a result, shares may trade at a
discount or a premium to their net asset value.

MORTGAGE-BACKED   AND   ASSET-BACKED   SECURITIES.   The  cash  flow  and  yield
characteristics of these securities differ from traditional debt securities. The
major  differences  typically include more frequent payments and the possibility
of prepayments on certain U.S. mortgage-backed  securities which will change the
yield to maturity of the security.

ILLIQUID  SECURITIES.  The Trust may  invest in  securities  that are  illiquid,
although  under current  market  conditions the Trust expects to do so to only a
limited extent. These securities involve special risks.

NON-U.S.  SECURITIES.  The Trust may invest a portion of its assets in  non-U.S.
dollar-denominated  securities  which  involve  special  risks such as currency,
political and economic risks,  although under current market conditions does not
do so.

ANTITAKEOVER  PROVISIONS.  Certain antitakeover provisions will make a change in
the Trust's  business or management  more difficult  without the approval of the
Trust's Board of Directors and may have the effect of depriving  shareholders of
an  opportunity  to sell their shares at a premium above the  prevailing  market
price.

                                       19
<PAGE>

- --------------------------------------------------------------------------------
            THE BLACKROCK NORTH AMERICAN GOVERNMENT INCOME TRUST INC.
                                    GLOSSARY
- --------------------------------------------------------------------------------

ADJUSTABLE RATE MORTGAGE-BACKED
SECURITIES (ARMS):                  Mortgage  instruments  with  interest  rates
                                    that adjust at periodic intervals at a fixed
                                    amount  over the market  levels of  interest
                                    rates as  reflected  in  specified  indexes.
                                    ARMS are backed by mortgage loans secured by
                                    real property.

ASSET-BACKED SECURITIES:            Securities   backed  by  various   types  of
                                    receivables  such as  automobile  and credit
                                    card receivables.                           

CANADIAN MORTGAGE SECURITIES:       Canadian  Mortgage   instruments  which  are
                                    guaranteed by the Canadian  Mortgage Housing
                                    Corporation  (CMHC), a federal agency backed
                                    by the full faith and credit of the Canadian
                                    Government.                                 
                                    
CLOSED-END FUND:                    Investment  vehicle which initially offers a
                                    fixed number of shares and trades on a stock
                                    exchange. The fund invests in a portfolio of
                                    securities  in  accordance  with its  stated
                                    investment objectives and policies.         
                                    
COLLATERALIZED
MORTGAGE OBLIGATIONS (CMOS):        Mortgage-backed  securities  which  separate
                                    mortgage  pools  into  short,   medium,  and
                                    long-term    securities    with    different
                                    priorities  for  receipt  of  principal  and
                                    interest.  Each  class  is paid a  fixed  or
                                    floating   rate  of   interest   at  regular
                                    intervals.   Also  known  as  multiple-class
                                    mortgage pass-throughs.                     
                                    
DISCOUNT:                           When a fund's  net  asset  value is  greater
                                    than its stock  price the fund is said to be
                                    trading at a discount.                      
                                                                      
DIVIDEND:                           This is income  generated by securities in a
                                    portfolio and  distributed  to  shareholders
                                    after the deduction of expenses.  This Trust
                                    declares  and pays  dividends  on a  monthly
                                    basis.                                      
                                                                        
DIVIDEND REINVESTMENT:              Shareholders   may   elect   to   have   all
                                    distributions of dividends and capital gains
                                    automatically   reinvested  into  additional
                                    shares of the Trust.                        
                                                                        
FHA:                                Federal Housing Administration, a government
                                    agency that facilitates a secondary mortgage
                                    market   by   providing   an   agency   that
                                    guarantees  timely  payment of interest  and
                                    principal on mortgages.                     
                                                                        
FHLMC:                              Federal Home Loan  Mortgage  Corporation,  a
                                    publicly    owned,    federally    chartered
                                    corporation  that  facilitates  a  secondary
                                    mortgage market by purchasing mortgages from
                                    lenders  such as  savings  institutions  and
                                    reselling  them to  investors  by  means  of
                                    mortgage-backed  securities.  Obligations of
                                    FHLMC  are  not   guaranteed   by  the  U.S.
                                    government,  however;  they  are  backed  by
                                    FHLMC's  authority  to borrow  from the U.S.
                                    government. Also known as Freddie Mac.      
                                                                        
FNMA:                               Federal  National  Mortgage  Association,  a
                                    publicly    owned,    federally    chartered
                                    corporation  that  facilitates  a  secondary
                                    mortgage market by purchasing mortgages from
                                    lenders  such as  savings  institutions  and
                                    reselling  them to  investors  by  means  of
                                    mortgage-backed  securities.  Obligations of
                                    FNMA   are  not   guaranteed   by  the  U.S.
                                    government,  however;  they  are  backed  by
                                    FNMA's  authority  to  borrow  from the U.S.
                                    government. Also known as Fannie Mae.       
                                                                        
GNMA:                               Government National Mortgage Association,  a
                                    government   agency   that   facilitates   a
                                    secondary  mortgage  market by  providing an
                                    agency  that  guarantees  timely  payment of
                                    interest and principal on mortgages.  GNMA's
                                    obligations  are supported by the full faith
                                    and credit of the U.S. Treasury.  Also known
                                    as Ginnie Mae.                              

                                       20
<PAGE>

GOVERNMENT SECURITIES:              Securities  issued or guaranteed by the U.S.
                                    government,   or  one  of  its  agencies  or
                                    instrumentalities,  such as GNMA (Government
                                    National   Mortgage    Association),    FNMA
                                    (Federal National Mortgage  Association) and
                                    FHLMC    (Federal    Home   Loan    Mortgage
                                    Corporation).                               
                                                                        
INTEREST-ONLY SECURITIES (I/O):     Mortgage  securities  that  receive only the
                                    interest cash flows from an underlying  pool
                                    of mortgage loans or underlying pass-through
                                    securities. Also known as a STRIP.          
                                                                        
INVERSE-FLOATING RATE MORTGAGES:    Mortgage   instruments   with  coupons  that
                                    adjust at periodic intervals  according to a
                                    formula which sets  inversely  with a market
                                    level interest rate index.                  
                                                                        
MARKET PRICE:                       Price per share of a security trading in the
                                    secondary  market.  For a  closed-end  fund,
                                    this is the  price at which one share of the
                                    fund  trades on the stock  exchange.  If you
                                    were to buy or sell shares, you would pay or
                                    receive the market price.                   
                                                                        
MORTGAGE DOLLAR ROLLS:              A mortgage  dollar roll is a transaction  in
                                    which   the  Trust   sells   mortgage-backed
                                    securities for delivery in the current month
                                    and  simultaneously  contracts to repurchase
                                    substantially   similar  (although  not  the
                                    same) securities on a specified future date.
                                    During the "roll" period, the Trust does not
                                    receive  principal and interest  payments on
                                    the  securities,   but  is  compensated  for
                                    giving up these  payments by the  difference
                                    in the  current  sales  price (for which the
                                    security  is sold) and lower  price that the
                                    Trust pays for the  similar  security at the
                                    end date as well as the  interest  earned on
                                    the  cash  proceeds  of  the  initial  sale.
                                                                        
MORTGAGE PASS-THROUGHS:             Mortgage-backed  securities issued by Fannie
                                    Mae,    Freddie    Mac   or   Ginnie    Mae.
                                    
MULTIPLE-CLASS PASS-THROUGHS:       Collateralized  Mortgage Obligations.

NET ASSET VALUE (NAV):              Net asset value is the total market value of
                                    all  securities and other assets held by the
                                    Trust,    plus   income   accrued   on   its
                                    investments, minus any liabilities including
                                    accrued  expenses,   divided  by  the  total
                                    number  of  outstanding  shares.  It is  the
                                    underlying  value  of a  single  share  on a
                                    given day.  Net asset value for the Trust is
                                    calculated  weekly and published in BARRON'S
                                    on Saturday and THE WALL STREET JOURNAL each
                                    Monday.                                     
                                                                        
PRINCIPAL-ONLY SECURITIES (P/O):    Mortgage  securities  that  receive only the
                                    principal cash flows from an underlying pool
                                    of mortgage loans or underlying pass-through
                                    securities. Also known as a STRIP.          
                                                                        
PROJECT LOANS:                      Mortgages   for   multi-family,    low-   to
                                    middle-income housing.                      

PREMIUM:                            When a fund's  stock  price is greater  than
                                    its net asset value,  the fund is said to be
                                    trading at a premium.                       
                                                                        
RESIDUALS:                          Securities   issued   in   connection   with
                                    collateralized   mortgage  obligations  that
                                    generally  represent  the  excess  cash flow
                                    from the mortgage assets  underlying the CMO
                                    after  payment of principal  and interest on
                                    the  other  CMO   securities   and   related
                                    administrative expenses.                    
                                                                        
REVERSE REPURCHASE AGREEMENTS:      In a reverse repurchase agreement, the Trust
                                    sells  securities  and agrees to  repurchase
                                    them at a  mutually  agreed  date and price.
                                    During  this time,  the Trust  continues  to
                                    receive the principal and interest  payments
                                    from that security.  At the end of the term,
                                    the Trust receives the same  securities that
                                    were sold for the same initial dollar amount
                                    plus  interest  on the cash  proceeds of the
                                    initial sale.                               

STRIPPED MORTGAGE BACKED SECURITIES:Arrangements  in which a pool of  assets  is
                                    separated  into  two  classes  that  receive
                                    different  proportions  of the  interest and
                                    principal   distribution   from   underlying
                                    mortgage-backed  securities.  IO's  and PO's
                                    are examples of STRIPS.                     
                                                                        

                                       21
<PAGE>
- --------------------------------------------------------------------------------
                      BLACKROCK FINANCIAL MANAGEMENT, INC.
                           SUMMARY OF CLOSED-END FUNDS
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
TAXABLE TRUSTS
- -------------------------------------------------------------------------------------------------------

                                                                                              MATURITY
PERPETUAL TRUSTS                                                      STOCK SYMBOL              DATE
                                                                        ---------               -----
<S>                                                                       <C>                   <C>
The BlackRock Income Trust Inc.                                           BKT                    N/A
The BlackRock North American Government Income Trust Inc.                 BNA                    N/A

TERM TRUSTS
The BlackRock 1998 Term Trust Inc.                                        BBT                   12/98
The BlackRock 1999 Term Trust Inc.                                        BNN                   12/99
The BlackRock Target Term Trust Inc.                                      BTT                   12/00
The BlackRock 2001 Term Trust Inc.                                        BLK                   06/01
The BlackRock Strategic Term Trust Inc.                                   BGT                   12/02
The BlackRock Investment Quality Term Trust Inc.                          BQT                   12/04
The BlackRock Advantage Term Trust Inc.                                   BAT                   12/05
The BlackRock Broad Investment Grade 2009 Term Trust Inc.                 BCT                   12/09
</TABLE>


<TABLE>
<CAPTION>
TAX-EXEMPT TRUSTS
- -------------------------------------------------------------------------------------------------------

                                                                                              MATURITY
PERPETUAL TRUSTS                                                      STOCK SYMBOL              DATE
                                                                        ---------               -----
<S>                                                                      <C>                    <C>
The BlackRock Investment Quality Municipal Trust Inc.                     BKN                    N/A
The BlackRock California Investment Quality Municipal Trust Inc.          RAA                    N/A
The BlackRock Florida Investment Quality Municipal Trust                  RFA                    N/A
The BlackRock New Jersey Investment Quality Municipal Trust Inc.          RNJ                    N/A
The BlackRock New York Investment Quality Municipal Trust Inc.            RNY                    N/A


TERM TRUSTS
The BlackRock Municipal Target Term Trust Inc.                            BMN                   12/06
The BlackRock Insured Municipal 2008 Term Trust Inc.                      BRM                   12/08
The BlackRock California Insured Municipal 2008 Term Trust Inc.           BFC                   12/08
The BlackRock Florida Insured Municipal 2008 Term Trust                   BRF                   12/08
The BlackRock New York Insured Municipal 2008 Term Trust Inc.             BLN                   12/08
The BlackRock Insured Municipal Term Trust Inc.      BMT      12/10
</TABLE>

      If you would like further information please do not hesitate to call
       BlackRock at (800) 227-7BFM or consult with your financial advisor.

                                       22
<PAGE>

- --------------------------------------------------------------------------------
                      BLACKROCK FINANCIAL MANAGEMENT, INC.
                                   AN OVERVIEW
- --------------------------------------------------------------------------------

      BlackRock Financial  Management,  Inc.  ("BlackRock") is an SEC-registered
investment  adviser.  BlackRock and its  affiliates  currently  manage over $118
billion  on behalf of  taxable  and  tax-exempt  clients  worldwide.  Strategies
include  fixed  income,  equity and cash and may  incorporate  both domestic and
international securities. BlackRock manages twenty-one closed-end funds that are
traded on either the New York or  American  stock  exchanges,  and a $23 billion
family of open-end equity and bond funds. Current  institutional  clients number
334, domiciled in the United States and overseas.

      BlackRock's  fixed  income  product  was  introduced  in 1988 by a team of
highly seasoned fixed income  professionals.  These  professionals had extensive
experience   creating,   analyzing   and  trading  a  variety  of  fixed  income
instruments,  including the most complex structured securities. In fact, several
individuals  at BlackRock  were  responsible  for  developing  many of the major
innovations  in  the  mortgage-backed   and  asset-backed   securities  markets,
including   the  creation  of  the  first  CMO,  the  floating   rate  CMO,  the
senior/subordinated pass-through and the multi-class asset-backed security.

      BlackRock  is unique  among asset  management  and  advisory  firms in the
emphasis it places on the  development of proprietary  analytical  capabilities.
Over one  quarter  of the  firm's  professionals  is  dedicated  to the  design,
maintenance  and use of these  systems,  which are not  otherwise  available  to
investors. BlackRock's proprietary analytical tools are used for evaluating, and
designing fixed income investment  strategies for client portfolios.  Securities
purchased include mortgages,  corporate bonds,  municipal bonds and a variety of
hedging instruments.

      BlackRock  has  developed  investment  products that respond to investors'
needs and has been  responsible  for several  major  innovations  in  closed-end
funds. In fact,  BlackRock  introduced the first  closed-end  mortgage fund, the
first taxable and tax-exempt  closed-end funds to offer a finite term, the first
closed-end  fund to  achieve a AAA rating by  Standard  & Poor's,  and the first
closed-end  fund to invest  primarily in North American  Government  securities.
Currently,  BlackRock's closed-end funds have dividend reinvestment plans, which
are designed to provide  ongoing  demand for the stock in the secondary  market.
BlackRock  manages a wide range of  investment  vehicles,  each having  specific
investment objectives and policies.

      In view of our continued  desire to provide a high level of service to all
our shareholders, BlackRock maintains a toll-free number for your questions. The
number is (800) 227-7BFM (7236).  We encourage you to call us with any questions
that you may have about your BlackRock  funds and we thank you for the continued
trust that you place in our abilities.


                      IF YOU WOULD LIKE FURTHER INFORMATION
           PLEASE DO NOT HESITATE TO CALL BLACKROCK AT (800) 227-7BFM

                                       23
<PAGE>

BLACKROCK

DIRECTORS
Laurence D. Fink, CHAIRMAN
Andrew F. Brimmer
Richard E. Cavanagh
Kent Dixon
Frank J. Fabozzi
James Grosfeld
James Clayburn La Force, Jr.
Walter F. Mondale
Ralph L. Schlosstein

OFFICERS
Ralph L. Schlosstein, PRESIDENT
Scott Amero, VICE PRESIDENT
Keith T. Anderson, VICE PRESIDENT
Michael C. Huebsch, VICE PRESIDENT
Robert S. Kapito, VICE PRESIDENT
Richard M. Shea, VICE PRESIDENT/TAX
Henry Gabbay, TREASURER
James Kong, ASSISTANT TREASURER
Karen H. Sabath, SECRETARY

INVESTMENT ADVISER
BlackRock Financial Management, Inc.
345 Park Avenue
New York, NY 10154
(800) 227-7BFM

ADMINISTRATOR
Prudential Investments Fund Management LLC
Gateway Center Three
100 Mulberry Street
Newark, N.J. 07102-4077

CUSTODIAN AND TRANSFER AGENT
State Street Bank and Trust Company
One Heritage Drive
North Quincy, MA 02171
(800) 699-1BFM

INDEPENDENT AUDITORS
Deloitte & Touche LLP
Two World Financial Center
New York, NY 10281-1434

LEGAL COUNSEL
Skadden, Arps, Slate, Meagher & Flom LLP
919 Third Avenue
New York, NY 10022

   The accompanying  financial  statements as of April 30, 1998 were not audited
and accordingly, no opinion is expressed on them.

   This report is for shareholder information. This is not a prospectus intended
for use in the purchase or sale of any securities.

                          THE BLACKROCK NORTH AMERICAN
                          GOVERNMENT INCOME TRUST INC.
                 c/o Prudential Investments Fund Management LLC
                              Gateway Center Three
                               100 Mulberry Street
                             Newark, N.J. 07102-4077
                                 (800) 227-7BFM


[LOGO]Printed on recycled paper                                      092475-10-2


THE BLACKROCK
NORTH AMERICAN
GOVERNMENT 
INCOME TRUST INC.
=================
SEMI-ANNUAL REPORT
APRIL 30, 1998

[GRAPHIC]



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