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1、主讲教师：王克平ModalVerbs情态动词Ifyouwanttocrossastreet,youmustwaitforthegreenlight.Youmustn’tcrossinfrontofthetraffic.Ifthelightisyellow,youshouldwait.Ifyouarenotcareful,acarmayhityou.IfyouareintheUK,youhavetodriveontheleft.andfindout情态动词,顾名思义是用来表达感情和态度的动词。表明说话人的立场和口气,以及说话想达到的
2、目的常用的情态动词有：can(could),may(might),must,haveto,need,oughtto,shall,shouldSomeofuscanusethecomputernow,butwecouldn’ttenyearsago.Can/CouldIborrowthesebooks?Thestorycannotbetrue.1）能，会：表示能力，相当于beableto(beableto适用于任何时态)。2）可以，表示许可，(may较正式，could较婉转）3）可能，表示否定推测，can’tbe不可能（2012年济
3、南）-----Lisa,_____youspeakFrench?-----Yes,butonlyalittle.A.needB.mustC.mayD.can2013济南---_____Ihelpyou,sir?---Yes,IwantaT-shirt.ACanBShouldCMustDWould（2010年北京）------＿＿youturndownyourradio,please?------Yes,Ican.A.MayB.NeedC.MustD.Can（2009年济南）-----Who’sthatgirlswimmingint
4、hepool?IsitLucy?-----It＿＿beLucy.Sheissleepinginherbedroomnow.A.mayB.can’tC.mustD.should1.表推测2.表请求、允许1.---MayIwatchTVaftersupper?---Yes,youmay.---No,Youmaynot/can’t./You’dbetternot.No,youmustn’t.2.Ifyouarenotcareful,acarmayhityou.可以，表示许可，相当于can.(注意问句中的回答）2)可能，或许，表示推测ma
5、ybe可能1.---MayIwatchTVaftersupper?---Yes,youmay.---No,Youmaynot/can’t./You’dbetternot.No,youmustn’t.(2010年福州)-----Dad,mustIdomyhomeworknow?-----No,you＿＿＿playgameswithyourfriendsforalittlewhile.A.wouldB.needn’tC.mayD.should（2009年广州）—＿＿＿Itakesomephotosinthehall?—No,you＿＿
6、＿.A.Can;needn'tB.Must;mustn'tC.Could;won'tD.May;mustn't1必须，应该Youmustfinishyourtaskbeforeplayinggames.2表示推测，意为“一定”Hemustbeathomenow.3一般疑问句肯定回答用must，否定回答则用needn’t或者don’thaveto.三、must的用法Ifyouwanttocrossastreet,youmustwaitforthegreenlight.Youmustn’tcrossinfrontofthetraffi
7、c.---MustIbehomebefore8o’clock?---Yes,youmust.---No,youneedn’t/don’thaveto.3.Theremustbesomethingwrongwithmycomputer.must:必须；mustn’t:不准，禁止回答带有must的问句时，否定式常用needn’t或don’thaveto.3)一定，表示肯定的猜测。（否定猜测用can’t）2013泰安28.—MayIsmokehere?--No,you.Thisisno-smokingroom.A.needn’tB.mu
8、stn’tC.couldn’tD.wouldn’tIfyouareintheUK,youhavetodriveontheleft.Theanimalsweeathavetospendtheirliveslivingintinyspaces.have
