<PAGE> PAGE 1
000 B000000 02/28/99
000 C000000 0000885408
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 DREYFUS BASIC U.S. GOVERNMENT MONEY MARKET
001 B000000 811-6606
001 C000000 2129226774
002 A000000 200 PARK AVENUE
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10166
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
018 000000 Y
019 A000000 Y
019 B000000 161
019 C000000 DREYFUSFAM
022 A000001 UBS AG
022 B000001 13-2932996
022 C000001 6920445
022 D000001 0
022 A000002 BARCLAYS DE ZOETE WEDD SECURITIES, INC.
022 B000002 13-3551367
022 C000002 2646025
022 D000002 0
022 A000003 DONALDSON, LUFKIN & JENIRETTE SECURITIES CORP
022 B000003 13-2741729
022 C000003 2341952
022 D000003 0
022 A000004 J.P. MORGAN SECURITIES INC.
022 B000004 13-3224016
022 C000004 2097510
022 D000004 0
022 A000005 LEHMAN BROTHERS INC.
022 B000005 13-2518466
022 C000005 1069055
022 D000005 0
022 A000006 MORGAN STANLEY DEAN WITTER INCORPORATED
022 B000006 13-2655998
022 C000006 951628
022 D000006 0
022 A000007 HSBC JAMES CAPEL SECURITIES INC.
<PAGE> PAGE 2
022 B000007 13-2650272
022 C000007 430820
022 D000007 73879
022 A000008 CIBC OPPENHEIMER
022 B000008 13-5942430
022 C000008 411000
022 D000008 0
022 A000009 CS FIRST BOSTON CORPORATION
022 B000009 13-5659485
022 C000009 333929
022 D000009 0
022 A000010 GOLDMAN, SACHS & CO.
022 B000010 13-5108880
022 C000010 276480
022 D000010 0
023 C000000 17826791
023 D000000 86878
025 A000001 UBS AG
025 B000001 13-2932996
025 C000001 D
025 D000001 9631
025 A000002 DELETE
025 D000002 0
025 A000003 DELETE
025 D000003 0
025 A000004 DELETE
025 D000004 0
025 A000005 DELETE
025 D000005 0
025 D000006 0
025 D000007 0
025 D000008 0
028 A010000 76941
028 A020000 4889
028 A030000 0
028 A040000 91491
028 B010000 92830
028 B020000 4682
028 B030000 0
028 B040000 78756
028 C010000 82641
028 C020000 4710
028 C030000 0
028 C040000 76644
028 D010000 88032
028 D020000 4419
028 D030000 0
028 D040000 176767
028 E010000 119519
028 E020000 4065
028 E030000 0
<PAGE> PAGE 3
028 E040000 111134
028 F010000 64308
028 F020000 3951
028 F030000 0
028 F040000 61812
028 G010000 524271
028 G020000 26716
028 G030000 0
028 G040000 596604
028 H000000 0
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 Y
053 B000000 Y
053 C000000 N
055 A000000 Y
055 B000000 N
057 000000 N
062 A000000 Y
062 B000000 0.0
062 C000000 98.2
062 D000000 0.8
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 84
063 B000000 0.0
064 A000000 N
070 A010000 Y
070 A020000 Y
070 B010000 N
070 B020000 N
070 C010000 N
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 N
070 E020000 N
<PAGE> PAGE 4
070 F010000 N
070 F020000 N
070 G010000 N
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 Y
070 J020000 N
070 K010000 N
070 K020000 N
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 N
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 0
071 B000000 0
071 C000000 0
071 D000000 0
072 A000000 12
072 B000000 66562
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 6142
072 G000000 0
072 H000000 0
072 I000000 1091
072 J000000 98
072 K000000 0
072 L000000 25
072 M000000 27
072 N000000 67
072 O000000 1
072 P000000 0
072 Q000000 31
072 R000000 18
072 S000000 5
072 T000000 0
072 U000000 0
<PAGE> PAGE 5
072 V000000 0
072 W000000 15
072 X000000 7515
072 Y000000 2017
072 Z000000 61064
072AA000000 4
072BB000000 15
072CC010000 0
072CC020000 0
072DD010000 60956
072DD020000 0
072EE000000 0
073 A010000 0.0495
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 2278
074 B000000 9631
074 C000000 1161284
074 D000000 0
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 9666
074 M000000 18
074 N000000 1182877
074 O000000 0
074 P000000 161
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 117
074 S000000 0
074 T000000 1182599
074 U010000 1182932
074 U020000 0
074 V010000 1.00
074 V020000 0.00
074 W000000 0.9992
074 X000000 9659
074 Y000000 0
075 A000000 1228406
075 B000000 0
076 000000 0.00
077 A000000 Y
077 B000000 Y
<PAGE> PAGE 6
077 Q010000 Y
080 A000000 NATIONAL UNION FIRE INSURANCE CO. OF PITT/PA
080 B000000 VIGILANT INSURANCE COMPANY
080 C000000 125000
081 A000000 Y
081 B000000 182
082 A000000 N
082 B000000 0
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
SIGNATURE STEPHANIE D. PIERCE
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000885408
<NAME> DREYFUS BASIC U.S. GOVERNMENT MONEY MARKET FUND
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> FEB-28-1999
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 1170915
<INVESTMENTS-AT-VALUE> 1170915
<RECEIVABLES> 9666
<ASSETS-OTHER> 2296
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1182877
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 278
<TOTAL-LIABILITIES> 278
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1182932
<SHARES-COMMON-STOCK> 1182932
<SHARES-COMMON-PRIOR> 1309078
<ACCUMULATED-NII-CURRENT> 295
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (628)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 1182599
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 66562
<OTHER-INCOME> 0
<EXPENSES-NET> 5498
<NET-INVESTMENT-INCOME> 61064
<REALIZED-GAINS-CURRENT> (11)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 61053
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (60956)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1024400
<NUMBER-OF-SHARES-REDEEMED> (1208431)
<SHARES-REINVESTED> 57885
<NET-CHANGE-IN-ASSETS> (126049)
<ACCUMULATED-NII-PRIOR> 187
<ACCUMULATED-GAINS-PRIOR> (617)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 6142
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7515
<AVERAGE-NET-ASSETS> 1228406
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .049
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.049)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .005
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
