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1、WelcometoEnglishClass!宁夏平罗县第四中学王燕MODELVERBSWelcometoNicetomeetyou!IcanreadEnglish!IcanspeakEnglish!Heissleeping.ButI…Ihavetodomyhomework.Ican'tsleep.We’relateforschool.MayIcomein?Ishouldn'tbelateforschool!What’sthis?Itmay/mightbeabasketballball.Itmustbeabal
2、l.情态动词有一定的词义，但词意不完整,不能单独作谓语，必须和实义动词连用,表说话人对某一动作或状态的态度和看法。情态动词后面跟动词原形，没有人称和数的变化。情态动词否定式否定式简略形式CanCouldMayMustShallShouldWillwouldCannot/cannotCouldMaynotMustnotShallnotShouldnotWillwouldCan’tCouldn’tMayn’tMustn’tShan’tShould’t常见情态动词1)can和could例句1)Mymothercan
3、usethecomputernow.2)Shecanswimfast,butIcan’t.3)CanIplayfootballnow,Mum?4)Youcanusemydictionary.5)Canthenewsbetrue?6)Hecan’thavegonetherealone.用法can表能力表请求、允许表推测(否、疑)could1)Hecouldwritepoemswhenhewasten.2)Shecouldn’tunderstandmeatthattime3)CouldIaskyouaquesti
4、on?表过去能力表委婉请求can和beableto表示能力时用法相同。can只有现在和过去时，而beableto则有更多的时态形式。表经过努力,成功地完成某事，通常不用can,而用beableto(相当于manageto/succeedindoingsth)。Thewoundedman___________gettothevillageandwassavedintheend.A.couldB.wasabletocan/could,beableto区别2）may与mightmay例句1)MayIborrowyo
5、urtypewriter?Yes,youmay.No,youmustn’t./No,youcan’t.2)Itmayraintomorrow.Shemaybeathome.用法表请求许可肯定句表推测might1)Heisawayfromschool.Hemightbesick.表推测可能小3)must/havetomust例句用法1)YoumuststayhereuntilIcomeback.2)MustIhandinmyhomeworkrightnow?No,youneedn’t./don’thaveto.
6、Yes,youmust.3)Thelightison,sohemustbeathomenow.4)Itmusthaverainedlastnight.表主观看法肯定句表推测haveto1)It’stoolate,Ihavetoleavenow.2)Youwon’thavetowaitforme.表客观需要haveto表客观上的需要,可用于现在时、将来时和过去时。Must表个人意志和主观上的需要，用于现在时和将来时;表规章制度Must为必须,mustn’t为禁止,回答must问句,肯定用must,否定用need
7、n’t或don’t/doesn’thaveto表不必;must还表示肯定的推测。用Must,haveto填空1.IknowI______studyhard.2.Mymotherisill.I________lookafterherathome.Must,haveto区别musthavetocan,may/might,must表推测Can用于否定句和疑问句,相当于beimpossible;may/might相当于benotcertain,用于肯定句,might可能性低于may;must相当于becertain,
8、表有把握的揣测。用can,may/might,must填空1.Pleaseaskthatman.He______knowthat.2.Thelightison,sohe______beathome.3.It______beWeiFang.Sheisatschoolnow.4.—AreyoucomingtoJeff’sparty?—I’mnotsure.I______gototheconcertins
