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1、英語語法情態(tài)動詞情態(tài)動詞情態(tài)動詞是髙考的重點考查項目，對學(xué)習(xí)情態(tài)動詞的要求是：首先、了解情態(tài)動詞各自的基本意義及用法，然后掌握情態(tài)動詞表示推測的用法（其小重點是對表過去推測的用法）還要注意帶有情態(tài)動詞的反意疑問句的用法。情態(tài)動詞的特征：1?本身有詞義，但完全。因此不能獨立作謂語，只能和動詞原形一起構(gòu)成謂語。2?后接動詞不定式一律不帶to3.不隨人稱和數(shù)的變化。情態(tài)動詞各口的基本意義及用法表一、can與could用法對比表對比點cancould1、表"能力”Canyouliftthisheavybox?Icouldn'tunderstandwhathesaidatal
2、l.2、表"許可"Youcanuseadiflerentmaterialinstead.HesaidIcouldborrowhisbike.3、"懷疑"No,no,itcan'tbetrue.Whatonearthcanthismean?Wethoughtthestorycouldnotbetrue.Howcouldyoubesocareless?4^can與beableto區(qū)別1.could代替can,表示語氣更為婉轉(zhuǎn)。Eg.CouldIuseyourbike?Yes,Ican2.can（能夠）=beableto（僅表能力時）,但beableto表示一番努力后,才
3、能做得到，且有更多的時態(tài)。Hewasagoodswimmer,soheswimtotheriverbankwhentheboatsank.A.couldB.mightC.shallD.wasableto表二、may與might用法對比表對比點mayMight1.表“詢問"MayI...?（=CanI...?）MightI...?（=Could【...?）（但比用may更客氣）2.表"允許"Youmaytaketheboythere.Hetoldmehemightcome.（might與told相呼應(yīng)）3.表"可能""或許"Shemaynorlikethisplace
4、.Tmafraidhemightnotlikethisplay.注：l.Mayl...?的答語。2.may可表示期望或祝愿Mayyousucceed!3.may（might）用于目的狀語從句中肯定：Yes,youmay.否定：No,youmustn't不行（語氣強硬）No,youmaynot或No,you'dbetternot.Theemperorgavethemsomegoldinorderthattheymightbegintheirworkatonce.表三、must與haveto的用法對比表對比點musthaveto1.表“必須（主觀看法）必須；沒有過去式，
5、可用于間接引語中°HetoldmeImustdoaccordingtowhathesaid.（客觀需要）不得不,有多種時態(tài)。Ifsrainingheavily,wecan^tgonow.2.疑問句MustI...?Yes,youmust?（一定）No,youneednt/youdoifthaveto.（不必）Doyouhavetogotoday?Yes,wedo.否定句:Youdon'thavetoworryaboutthat.表四、need與dare的用法對比表對比點needdare1.情態(tài)動詞+動詞原形1）否定式2）疑問式Heneednot（needn,t）go
6、.-…Needwedoitagain?—No,youneedn'tdoitagain.Hedarenotsayso.Dareshegooutaloneatnight?HowdareyousayFmunfair?Ifhedaredothat,he'llbepunished/條件句）Idaresay.（固定用法）2.行為動詞+帶to不定式1）肯定式2）否定式3）疑問式Heneedstogo.Hedoesn't（doesnot）needtogo.Doesheneedtodoitagain?No,hedoesn'tneedotdoitagain.Hedarestosay?H
7、edoesnot（doesn^t）daretosay.Ifyoudaretojumpintothewaterfromhere,sodareI?3.didnotneedtodo表示過去沒有必要做Shedidn'tneedtoattendthemeetingyesterday,andshestayedwithherchildren/她沒有參加）表五、should與oughtto用法對比表對比點shouldoughtto1、表“應(yīng)該”表勸告、建議Youshouldlistentothedoctor'sadvice?WcshouldteamfromZhangHua表示"
