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1、英语语法情态动词情态动词情态动词是髙考的重点考查项目，对学习情态动词的要求是：首先、了解情态动词各自的基本意义及用法，然后掌握情态动词表示推测的用法（其小重点是对表过去推测的用法）还要注意带有情态动词的反意疑问句的用法。情态动词的特征：1•本身有词义，但完全。因此不能独立作谓语，只能和动词原形一起构成谓语。2•后接动词不定式一律不带to3.不随人称和数的变化。情态动词各口的基本意义及用法表一、can与could用法对比表对比点cancould1、表"能力”Canyouliftthisheavybox?Icouldn'tunderstandwhathesaidatal
2、l.2、表"许可"Youcanuseadiflerentmaterialinstead.HesaidIcouldborrowhisbike.3、"怀疑"No,no,itcan'tbetrue.Whatonearthcanthismean?Wethoughtthestorycouldnotbetrue.Howcouldyoubesocareless?4^can与beableto区别1.could代替can,表示语气更为婉转。Eg.CouldIuseyourbike?Yes,Ican2.can（能够）=beableto（仅表能力时）,但beableto表示一番努力后,才
3、能做得到，且有更多的时态。Hewasagoodswimmer,soheswimtotheriverbankwhentheboatsank.A.couldB.mightC.shallD.wasableto表二、may与might用法对比表对比点mayMight1.表“询问"MayI...?（=CanI...?）MightI...?（=Could【...?）（但比用may更客气）2.表"允许"Youmaytaketheboythere.Hetoldmehemightcome.（might与told相呼应）3.表"可能""或许"Shemaynorlikethisplace
4、.Tmafraidhemightnotlikethisplay.注：l.Mayl...?的答语。2.may可表示期望或祝愿Mayyousucceed!3.may（might）用于目的状语从句中肯定：Yes,youmay.否定：No,youmustn't不行（语气强硬）No,youmaynot或No,you'dbetternot.Theemperorgavethemsomegoldinorderthattheymightbegintheirworkatonce.表三、must与haveto的用法对比表对比点musthaveto1.表“必须（主观看法）必须；没有过去式，
5、可用于间接引语中°HetoldmeImustdoaccordingtowhathesaid.（客观需要）不得不,有多种时态。Ifsrainingheavily,wecan^tgonow.2.疑问句MustI...?Yes,youmust・（一定）No,youneednt/youdoifthaveto.（不必）Doyouhavetogotoday?Yes,wedo.否定句:Youdon'thavetoworryaboutthat.表四、need与dare的用法对比表对比点needdare1.情态动词+动词原形1）否定式2）疑问式Heneednot（needn,t）go
6、.-…Needwedoitagain?—No,youneedn'tdoitagain.Hedarenotsayso.Dareshegooutaloneatnight?HowdareyousayFmunfair?Ifhedaredothat,he'llbepunished/条件句）Idaresay.（固定用法）2.行为动词+带to不定式1）肯定式2）否定式3）疑问式Heneedstogo.Hedoesn't（doesnot）needtogo.Doesheneedtodoitagain?No,hedoesn'tneedotdoitagain.Hedarestosay・H
7、edoesnot（doesn^t）daretosay.Ifyoudaretojumpintothewaterfromhere,sodareI・3.didnotneedtodo表示过去没有必要做Shedidn'tneedtoattendthemeetingyesterday,andshestayedwithherchildren/她没有参加）表五、should与oughtto用法对比表对比点shouldoughtto1、表“应该”表劝告、建议Youshouldlistentothedoctor'sadvice・WcshouldteamfromZhangHua表示"
