高中英语情态动词详解(必修三unit1-2)课件.ppt

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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/ne

2、ed/dare/dared/will/would/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.The

3、firespreadthroughthehotelveryquicklybuteveryonewasabletogetout.1.can表示现在的能力(ability)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”(permission)could用来表示请求的时候比can更委婉CanyouhelpmewithmyEnglish?HesaidIcouldborrowhisbike.CouldIuseyourbike?—CouldIborrowyourdictiona

4、ry?—Yes,ofcourseyou____．A.mightB.willC.canD.should3.表“可能性”(possibility)P5,4can,could用在肯定句中表示理论上的可能性，“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，forIsawh

5、erinthetownonlyafewminutesago．A．mustn'tB．can'tC．shouldn'tD．maynot2.MyMP4playerisn’tinmybag.Where____Ihaveputit?A.canB.mustC.shouldD.would(08湖南28)Youdon’thavetoknowthenameoftheauthortofindabook.Youfindthebookbythetitle.A.must                   B.need                 C.can     

6、             D.would答案Ccan表示“可以，能够”。(08浙江11)Youbehungryalready—youhadlunchonlytwohoursago!A.wouldn’t              B.can’t               C.mustn’t             D.needn’t答案B解析 句意为：你不可能饿了，你两个小时之前才吃的午饭！can’t指不可能；mustn’t表猜测时，不能用于否定句；Needn’t指没有必要。(08福建24)Itisusuallywarminmyhometow

7、ninMarch，butitberathercoldsometimes.A.must                   B.can                  C.should               D.would答案B解析must必然，一定；can可能；should应该；would（过去）将，总会。本题提供的语境是“有时可能会……”。Peterbereallydifficultattimeseventhoughhe’sanicepersoningeneral.A.shall                  B.should 

8、              C.can                  D.must答案C解析 句意为：虽然彼得总体上来说是一个好人，