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    ӢZďͺ^ZõĎ׷Nʽǽ߿ğcͬrǽ̲е

ycͬWe} ͳõĎ׷Nʽһ\ڌͬW

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    I.B(ti)~ʽ

    1.B(ti)~can,could,may,might,will,would,shall,shouldc

ʽһʽB˼"" "S"""ҪʾF(xin)

ڻ򌢁ƜyrB(ti)~^ȥʽcһʽںxϲo ^(q)eֻ

ZD磺

    (1)--Could I borrow your dictionary?ҿԽo

    --Yes,of course you can.(NMET94-23)Ȼ

    (2)If there were no examination,we should have a much happier time

at school.(NMET94-30)Ҫ ԇ҂ڌWУ͕ø_Щ

    2.can,may,mustͲʽʽBãʾ^ȥl(f)Оڵ

B(ti)MƜyxǡ ѽ(jng)""Sѽ(jng)""һ"ȡ

    (3)Where is my pen?I must have lost it.(NMET92-35,SAM)ҵ䓹P

ҜŪGˡ

    (4)--Li Hua must have gone to Beijing.Aһȥ

    No,he can't have g

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