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情态动词的基本用法can/couldmay/mightwill/wouldshallshouldmustneeddareoughttohaveto能力;许可;请求;猜测请求;许可;可能性决心,意愿;请求;习惯性动作(would)征求对方意见;（二三）警告,允诺；强制…劝告,建议,命令;竟然；推测必要;很有把握的推测情态动词表推测be＋n./adj.dobedoingHavebeendoinghavedone情态动词(not)＋构成板书现在/将要现在/将要正在一直在已发生情态动词表推测一、肯定的陈述句：must,should/oughtto,could,may,might,等，一般不用can。1.HemustbePierreCardin.2.AskJim.Hemayknowtheanswer.3.Hurryup.Yourmothermustbewaitingforus.4.It’swetoutside.Itmusthaverainedjustnow.情态动词表推测二、否定句：can’t,couldn’t,maynot,mightnot等，不能用mustn’t，因为mustn’t表示“禁止;不准”。1.Johncan’tbeabasketballplayer,forheistooshort.2.Theboymaynotbehungry.3.Shecan’tbesleepingrightnow,forIjustsawhimintheplayground.4.Hecouldn’thavespokenatthemeetingthismorning,forIsawhiminthestreetthen.情态动词表推测三、疑问句：can,could表示“有可能……吗？”但不能用may,might或must。因为在句首时may,might表示“可以”，must表示“必须”，都不用于推测。1.Canitbemorebeautiful?它有可能更美吗？（暗含“它美得不能再美了”）2.Couldthenewsbetrue?Shewondered.这消息可靠吗？她表示怀疑。情态动词＋完成式(havedone)musthavedonecould/may/mighthavedonecan/couldnothavedone过去肯定做过某事过去可能做过某事不可能做过某事couldhavedoneshould/oughttohavedoneshouldn’thavedoneneedn’thavedonewouldhavedone本可能做而没有做本应该做而未做本不应该做而做了本不必要做而做了愿意做但没有做推测遗憾责备(虚拟)1.A:MayI…?B:Yes,youcan./No,youmustn’t.2.A:Mustwe…?B:Yes,youmust.No,youdon’thaveto./No,youneedn’t.3.A:Needthey…?B:Yes,theymust.No,theyneedn’t.4.A:ShallItellhimaboutit?B:Yes,youcan/may.No,youcan’t/needn’t/shouldn’t.may,must,need,shall的疑问句的回答BD1.Ididn’thearthephone.I___asleep.A.mustbeB.musthavefallenC.shouldbeD.mightbefalling2.–Therewerealreadyfivepeopleinthecarbuttheymanagedtotakemeaswell.–It___acomfortablejourney.A.can’tbeB.shouldn’tbeC.mustn’thavebeenD.couldn’thavebeen3.Peter___comewithustonight,butheisn’tverysureyet.AmustBmayCcanDwill4.Itmusthaverainedlastnight,___it?Ahasn’tBmustn’tCdidn’tDhadn’t5.Youmusthaveheardaboutthisaccident,___you?A.mustn’tBhaven’tCdon’tDdidn’tBCBC情态动词+havedone:已发生e.g.–IenjoyedmytriptoPairsbutthehotelsthereweremuchtooexpensive.–Really?You___withBarbara.A.musthavestayedB.shouldstayC.couldhavestayedD.mightstay6.Westillhadanothertwentyminutesleftwhenwereachedthestation.We___ataxi.Ashouldn’ttakeBneedn’thavetakenCmustn’ttakeDmightnothavetaken7.You___herthat.Seehowupsetsheis!Ashouldn’ttellBoughtn’ttohavetoldCmustn’thavetoldDneedn’ttell8.Mary,you’relateagain.You___tenminutesearlier.AmustarriveBmayhavearrivedCshouldhavearrivedDoughttoarriveBBCTranslationEnglishtoChineseYoumustn'ttalktogirlslikethat.你绝不能那样对女孩子说话。Itmusthaverainedlastnightforitissowetoutside.外面这么湿，昨晚肯定下雨了。Youmustbetiredafterworkingsolong.你工作这么久以后，肯定累了吧。Youmusthurryuporyou‘llbelate.你必须得快点儿，不然会迟到的。Weoughttostudyhardforthesakeofourmotherland.我们应该为了我们的祖国而努力学习。Theyoughttohavecompletedtheirworkmuchearlier.他们本应该在更早一些的时候完成他们的工作的。Yououghtn'ttohaveleftyourkeysintheofficewhenyouwentout.你不该出去的时候将钥匙留在办公室里。Youshouldwritetoyourparentsatleastonceamonth.你应该至少每月给你父母亲写一封信。Thisbookshouldbepublishedintwomonthsatmost.这本书最多两个月后就会出版的。Thedoctorinsistedthatthegirlshouldbehospitalized.大夫坚持认为那个女孩要住院治疗。WhyshouldIbewaitingherewithoutdoinganything?我凭什么在这儿白等?Youshouldn'thaveleftyoursonaloneathome.你不该将你儿子一个人留在家里的。Atthismoment,ourteachermustbecorrectingourexampapers.这时，我们老师想必在批改试卷。Mikecan‘thavefoundhiscar,forhecametoworkbybusthismorning.迈克一定还没有找回他的车，因为早上他是坐公共汽车来上班的。Idressedverywarmlyforthetrip,butIneedn'thavedoneso.Theweatherwashot.Iwouldliketohavereadthearticle,butIwasverybusythen.情态动词＋完成式(havedone)表推测注意：1.“过去不可能做过某事”不能用“mustnothavedone”，只能用“can/couldnothavedone”2.can/couldhavedoneA.过去可能做过某事;B.表示“遗憾、惋惜、责备”，意思是“本可能做而没有做”1.musthavedone过去肯定做过某事2.may/might(not)havedone过去可能做过某事3.can/couldnothavedone不可能做过某事