高中情态动词课件大全

modalverbsGrammar情态动词表本义表推测的含义cancouldmaymightshallshouldwillwouldoughttomusthavetodare(daren’t)need(needn’t)usedto情态动词有一定的意义，但没有人称和数的变化，不能独立使用，它和后面的动词构成谓语．只作情态动词的can/could,may/might,shall/should,will/wouldoughtto，must可作情态动词也可当实义动词：need,dare/dared相当于情态动词：haveto,usedto1）may表示许可，翻译成：可以MayIopenthedoor?Wemaykeepthebookfortwoweeks.2）用于祈使句，表示祝愿。Mayyousucceed!Mayyouhaveanicetrip!may/might的用法3.may/might表示可能性推测时，翻译成：或许Theymaycomeheretomorrow.Theymaybestillwaitingforus.4.maynot与cannot的区别反馈训练2page185must的用法must1.must表示推测时，翻译成：“一定”只能用于肯定句。Theremustbesomethingwrongwiththecomputer.Youhaveworkedhardallday.Youmustbetired.2.must还表示：必须Imustgotoschoolnow,orIwillbelate.3.must引导的疑问句时肯定用must回答否定要用needn’t或don’thaveto来回答MustIhandinmyhomework?Yes,youmust.No,youneedn’t或No,youdon’thaveto.mustn’t表示“禁止，不允许”4.must+bedoing/do表示对现在的动作进行肯定推测Hemustbereadingnovelsnow.Theyhavejustboughtanewexpensivecar.Theymusthavealotofmoney.shall/should的用法1.shall用于第二、三人称陈述句中，表示说话人给对方的命令，警告，允诺或威胁。1)Youshallgowithme.(命令)2)YoushallhavethebookwhenIfinishit.(允诺)3)Heshallbepunished.(威胁)2.shall用于第一、三人称疑问句中，表示说话人征求对方的意见和向对方请示。4)Shallwebeginourclass?（征求意见）5)WhenshallMikebeabletoleavehospital?(请示)3.用于条约，法律，规定，规章等文件中，表示一种义务，多用于第三人称中。6)“Theinterest___bedividedintofiveparts,accordingtotheagreementmadebybothsides.”declaredthejudge.A.mayB.shouldC.mustD.shall4.should=oughttodo翻译成：“应该”should常表示劝告、建议、命令，oughtto多表示责任、义务，语气强烈。两者可以随时互换Youngpeopleshouldlearnhowtousecomputers.Everycitizenoughttoobeylaw.Yououghtnottogo.Youshouldhavetoldherthetruth.Sheshouldn’thaveleftwithoutsayingaword.4.shouldhavedonesth“本应该做某事…而没有去做…”shouldn’thavedonesth否定则表示“本不该做某事…而已经做了”反馈训练3Page1871.Will/Wouldyoudo…?(表请求would更委婉)表意志，愿望，决心2.would与usedto的区别would表过去常常做某事，现在还有此习惯。“总是,总要”usedto表过去常常做某事，但现在已没有这种习惯）“过去常常”will/would的用法need/dare的用法Page188讲解反馈训练4Page189