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1、情态动词Modalverbs常用的情态动词can(could)may(might)shall(should)will(would)mustdare(dared)needhavetooughttobeabletousedtoThefeatures(特点)ofthemodalverbs:1.情态动词本身有词义,但词义不完全.2.不能单独作谓语,只能和动词原形一起构成谓语.3.情态动词没有人称和数的变化(除“haveto”).4.没有不定式、V-ing、V-ed形式.Hecan/could/must/may/might/shall/should/need/dare/dared/will/wo
2、uld/oughtto/usedto+workinthatfactory.Hehastogohomenow.Hehadtolookafterhissickmother.在情态动词的使用中,我们要注意以下考点:1.情态动词的基本用法。2.情态动词表推测的用法。3.情态动词+havedone的用法。1.表“能力”can,could的用法Ican/amabletoswim.Icould/wasabletoclimbatreewhenIwasachild.Iwillbeabletoswimnextweek.Thefirespreadthroughthehotelveryquicklybuteve
3、ryonewasabletogetout.1.can表示现在的能力2.could表示过去的能力3.beableto表能力,可用于多种时态4.beableto强调成功地做了某事2.表“请求,许可”could用来表示请求的时候比can更委婉CanyouhelpmewithmyEnglish?HesaidIcouldborrowhisbike.CouldIuseyourbike?—CouldIborrowyourdictionary?—Yes,ofcourseyou____.A.mightB.willC.canD.should3.表“可能性”can,could用在肯定句中表示理论上的可能性,“
4、经验之谈”Asahumanbeing,anyonecanmakeamistake.can,could用在疑问句中表推测,表示可能性Canshebeintheclassroom?can,could用在否定句中表推测,翻译成“不可能”Wethoughtthestorycouldn’tbetrue.1.Mary____beinParis,forIsawherinthetownonlyafewminutesago.A.mustn'tB.can'tC.shouldn'tD.maynot2.MyMP4playerisn’tinmybag.Where____Ihaveputit?A.canB.must
5、C.shouldD.would1.表“询问”(might比用may更客气.)MayI…?(=CanI…?)MightI…?(=CouldI…?)MayIborrowyourbook?may与might用法—MayIpickaflowerinthegarden?—________.A.No,youneedn’tB.Not,please.C.No,youmustn’tD.No,youwon’t注意:mayI…?的答语.肯定:Yes,youmay.否定:No,youmustn’t(语气强硬)No,youmaynot.或No,you’dbetternot.2.表“许可”Youmaytakethe
6、boythereHesaidthatImightusehistelephone.—MightIwatchTVaftersupper?—Yes,you________.A.mayB.mustC.mightD.could3.表推测,表示主观上的推测,“可能,也许”,不用于疑问句,might比may的可能性更小Shemaynotlikethisplace.I’mafraidhemightnotlikethisplace.Peter____comewithustonight,butheisn’tverysureyet.A.mustB.mayC.canD.will1.must表示主观上的必须,应该
7、,没有时态变化。YoumustdoeverythingasIdo.注意:—MustIfinishmyhomeworktoday?—Yes,youmust.—No,youneedn’t./No,youdon’thaveto.must的用法“必须、不得不”must表示的是说话人的主观看法。haveto表示的是客观需要。(是由于某种外界(客观)原因而“必须”,“不得不”做某事,也可表示经常的或习惯性的事“必须”做。)Ihavetobea