情态动词虚拟.ppt

《情态动词虚拟.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、情态动词一些补充musthavedone表示对过去已经发生的行为的推测，意为“想必、准是、一定做了某事”。如：Itmusthaverainedlastnight,fortheroadwasquitemuddy.cannothavedone表示对过去发生的行为的怀疑和不肯定。如：Hecannothaveforgottenit.couldhavedone用于肯定句中，表“本来可以…”eg.Youcouldhavedonebetter,butyouweretoocareless.Mighthavedon

2、e“本来可能…”，但实际上没有发生。另外，还可表示“本来可以或可以做某事”之意，含有责备语气。如：Youmighthavegivenhimmorehelp,thoughyouwerebusy.Should/oughttohavedone用于肯定句时表示“本该做某事，而实际上未做”，用于否定句时则表示“不该做的反而做了”Eg.Youshouldhavecometothemeetingearlier.Youshouldn’thavetoldherthetruth.needn’thavedone表示做了

3、本来不必去做的事。如：Youneedn’thavetakenataxihere,foritwasveryclosetomyhouse.情态动词练习题1)You____allthoseclothes!WehaveawashingmachinetodothatsortofthingA)needn'thavewashedB)shouldn'thavewashedC)mustnothavewashedD)cannothavewashedA2)John'sscoreonthetestisthehigh

4、estintheclass;he____lastnight.A)shouldstudyB)shouldhavestudiedC)musthavestudiedD)musthavetostudyC3)Theroomisinaterriblemess;it____cleaned.(CET-4,1996,6)A)can'thavebeenB)shouldn'thavebeenC)mustn'thavebeenD)wouldn'thavebeenA4)Nobodyknowshowpeoplefirstca

5、metotheseislands.They____fromSouthAmericaonrafts.A)musthavesailedB)cansailC)mighthavesailedD)shouldhavesailedC5)Marywasnotinherbedroomyesterdayafternoon.She____inherclassroom.A)shouldhavebeenB)musthavebeenC)mustbeD)shouldbeB6)Bobsaidhewasgoingtojoinou

6、rclubbuthedidn't.He____hismind.A)can'thavechangedB)wouldn'thavechangedC)musthavechangedD)shouldn'thavechangedC7)You____totowntoseethefilmyesterday.ItwillbeonTVtonight.A)needn'tgoB)hadbetternotgoC)shouldnotgoD)needn'thavegoneD8)We____theletteryesterda

7、y,butitdidn'tarrive.A)mustreceiveB)oughttoreceiveC)musthavereceivedD)oughttohavereceivedD9)Withalltheworkonhand,he____tothecinemalastnight.A)mustn'tgoB)shouldn'thavegoneC)couldnotgoD)couldn'thavegoneD9)He____the9:20trainbecausehedidn'tleavehometill9:2

8、5.A)canreachB)couldcatchC)maynotcatchD)couldn'thavecaughtD10)Evewaslateforclassagain.She____earlier.A)shouldgetupB)mustgetupC)needtogetupD)shouldhavegotupD11)Iamfeelingsick.I____somuchchocolate.A)needn'thaveeatenB)couldn'thaveeatenC)mustn'thav