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返回返回②Hismotherisill.Hehastostayathometolookafterher.③ImustfinishtheworkbeforeFriday.④—NeedIhandinmypapernow?—Yes,youmust./No,youneedn't.①Bynowhisrestaurantoughttobefullofpeople.⑤SomethingterriblemusthavehappenedifLiChangwasnotcomingtoeatinhisrestaurantashealwaysdid.返回1.用haveto完成句子①天色太晚了,我现在得回家了。It'stoolate,soInow.②昨天我不得不离开。Iyesterday.③你们没有必要担心考试。Youtheexam.havetogohomehadtoleavedon'thavetoworryabout返回④我必须马上做吗?—MustIdoitatonce?不,你不必。—No,.22.选词填空:must,mustn't,haveto①现在我不得不走了,因为我妈妈生病了。Igonow,formymotherisill.②我一定要戒烟。Istopsmoking.③晚上你一定不能独自出去。Yougooutaloneatnight.youdon'thavetohavetomustmustn't返回2.need的用法1.need作情态动词,常用于否定句、疑问句和条件句。Youneedn'tcomesoearly.NeedIcomeearlytomorrow?[点津]由need引出的一般疑问句的肯定回答常用must或haveto,否定回答常用needn‘t。2.作为实义动词Youdon'tneedtocomesoearly.DoIneedtocomeearlytomorrow?返回31.用need或must完成句子①你现在不必去那儿。Yougotherenow.needn't②他有必要留在这儿吗?—hestayhere?是的,他必须。/不,他不必要。—Yes,he./No,he.mustneedn'tNeed返回我们不必告诉他真相。Wedon'tneedtotellhimthetruth.Weneedn’ttellhimthetruth.返回3、oughtto的用法1.oughtto“应该”。与should相比较oughtto语气重,偏重“责任、义务、道德、法律”等方面,意为“应该”。Weoughttostoppollutingnature.我们应该停止污染大自然。2.oughtto表示较大的可能性,但语气比must要弱。Maryoughttobeheresoon.玛丽应该很快就来了。返回3.oughtto的否定形式为oughtnotto或oughtn'tto,其一般疑问句形式是将ought置于主语前。Weoughtnottostartsolate.—Oughtwetodoitatonce?—Yes,yououghtto.返回•4.在反义疑问句中,常省掉to用oughtn't或shouldn't。–Heoughttotakebackwhathehassaid,oughtn't/shouldn'the?–他应该收回他说的话,是吗?返回12.用ought完成句子①你不该责备他。Youhim.oughtn't/oughtnottoscold②我明天该动身吗?—tomorrow?是的,你应该。—Yes,.③我们现在应该走,是吗?Weoughttogonow,?OughtItoleaveyououghttooughtn't/shouldn'twe返回四、情态动词+havedone的用法1.musthavedone用于肯定句,表示“过去一定做过某事”。Howcanyoubelateagain?You你怎么又迟到了?你一定是睡过头了。musthaveoverslept.返回•2.can/couldhavedone一般用于疑问句和否定句中,表示对过去所发生事情的推测。–HeTVlastnight,forheknewhewouldhaveatest.–昨天晚上他不可能看电视,因为他知道就要考试了。can't/couldn'thavewatched返回–couldhavedone用于肯定句时,表示“本有能力做某事而未做”。–Wecouldhavearrivedtherebeforedark,butwedidn't.–天黑前我们本来能够到那里的,但是没到。返回3.should/oughttohavedone表示“过去本应该做某事而(实际上)没有做”,含有责备或遗憾的语气;其否定形式表示某种行为不该发生却发生了。YoushouldhavetoldmeearlierorImighthavegonewiththem.你应该早点告诉我,不然的话我就会和他们一块去了。Youshouldn'thaveletanyoneelseknowthesecret.你本不应该让其他任何人知道这个秘密的。返回4.may/mighthavedone表示对过去发生的事情的推测,意为“也许已经做了某事,可能已经做了某事”,多用在肯定句中,用might时表示语气更加不肯定。Ifyouhadstudiedhard,youmighthavepassedtheexam.如果你努力学习的话,你可能会及格的。返回•5.needn'thavedone表示“本不必做某事而实际做了”。–It'ssonear!Weneedn'thavetakenataxi.–这么近!我们根本没有必要坐出租车。返回根据汉语意义,用“情态动词+havedone”填空①你肯定看过电影《淘金热》。YouthefilmTheGoldRush.②史密斯先生不可能去北京了,我刚才还在图书馆看见他。Mr.SmithtoBeijing,forIsawhiminthelibraryjustnow.③本来他能够通过考试,但是他太粗心了。Hetheexam,buthewastoocareless.musthaveseencan'thavegonecouldhavepassed返回④以前你应该多进行锻炼的。Youmoreexercisebefore.⑤你可能已经在报上看过这个消息。Youaboutitinthepapers.⑥你本不必告诉我这个消息,我已经知道了。Youmethenews.Ihavealreadyknownit.shouldhavedonemight/mayhavereadneedn'thavetold返回1.(2012·天津高考)It'squitewarmhere;we________turntheheatingonyet.A.couldn‘tB.mustn'tC.needn'tD.wouldn't解析:选。考查情态动词。句意:这里相当暖和,我们没有必要还开着暖气。needn't“不必”;couldn't“不能”;mustn't“禁止”;wouldn't“不肯,不会”。根据句意可知选C。C返回2.(2012·江西高考)We________haveboughtsomuchfoodnowthatSuziewon'tbewithusfordinner.A.maynotB.needn'tC.can'tD.mustn't解析:选。考查情态动词表推测的用法。本题要注意后面的nowthat从句:Suzie不与我们一起吃饭。所以前面是在说我们本没有必要买那么多饭。needn'thavedone表示某事已经做了,但后来觉得没必要去做,因此常含有责备或遗憾之意,译成汉语通常是“本来不必……”,句意:我们本来不必买这么多食物的,因为Suzie不与我们一起吃饭。B返回3.(2012·江苏高考)—Happybirthday!—Thankyou!It'sthebestpresentI________for.A.shouldhavewishedB.musthavewishedC.mayhavewishedD.couldhavewished解析:选。考查情态动词。句意:“生日快乐!”“谢谢你!这是我所能期望的最好的礼物了。”couldhavewished意为“可能希望”,符合句意。D返回4.(2011·江苏高考)—Ileftmyhandbagonthetrain,butluckilysomeonegaveittoarailwayofficial.—Howunbelievabletogetitback!Imean,someone________it.A.willhavestolenB.mighthavestolenC.shouldhavestolenD.musthavestolen解析:选。句意:“我把我的手提包落在火车上了。但幸运的是,有人拾到交给了铁路部门。”“失而复得,简直难以置信!我是说,本来可能有人会偷了去。”mighthavedone过去可能做过,语气比较婉转或不肯定。B返回5.(2010·湖南高考)You________buyagift,butyoucanifyouwantto.A.mustB.mustn'tC.havetoD.don'thaveto解析:选。考查must和haveto的区别。句意:你没有必要买礼物,但如果你想买的话,你也可以买。don'thaveto意为“没有必要”,符合语境。D返回点击下图片进入第3步
本文标题:wy人教必修三Unit 2 healthy eating 语法 Grammar ― 情态动词(Ⅱ)
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