人教版必修三unit2 语法情态动词2

1.Oughtto•表应该做的事：Yououghttodoitcarefully.•表非常可能的事：Heoughttobeherebynow.oughtto表应该，语气＞should2.oughtto的否定句形式是oughtn’tto,一般疑问形式是将ought置于主语前.eg:Weoughtnottostartsolate.3.在反意疑问句中常常省略to,用oughtn’t或是shouldn’t.YououghttohavehelpedhimwithhisEnglish,________?A.won’tyouB.oughtnotyouC.shouldn’tyouD.wouldn’tyou2.haveto•haveto表示客观需要去做的事情，意为“必须，不得不。”•Ihavetogetthestationearlytocatchthefirsttrain.•Wemissedthebussowehadtowalkhome.•Wehavetoovercomeallkindsofdifficulties.•Haveto有多种时态。常见的有：•一般将来时•Wewillhavetogatherattheschoolgateat7tomorrow.•一般现在时•Ihavetotakemoremoneywithmebecausemygirlfriendhassomuchtobuy.•一般过去时•Finally,wehadtogiveupourideatoholdapicnicoutsideasitrainedforawholeafternoon.haveto（考点）•must表主观意志，而haveto表由于客观因素不得不做完成的事情。•Must没有过去式，除在间接引语中可表示过去的时间。在直接引语中表示过去的时间用hadto代替。•Itoldherthatshemustgiveupsmoking.•Shesaid,“Wehadtogeteverythingreadythatnight.”比较must&haveto即学即用:用haveto完成句子.1.天色太晚了,我现在的得回家了.Itistoolate,soI_____________now.2.昨天我不得不离开.I___________________yesterday.3.他们没必要担心核辐射.They________________thenuclearradiation.4.我必须马上做吗?----MustIdoitatonce?----No,______________________.选词填空:must,mustn’t,haveto5.现在我不得不走了,因为我妈妈生病了.I_________gonow,formymotherisill.6.我一定要戒烟.I_______stopsmoking.7.晚上你一定不能独自出去.You_________gooutaloneatnight.1.Johnny,you______playwiththeknife,you______hurtyourself.A.won’t;can’tB.mustn’t;mayC.shouldn’t;mustD.can’t;shouldn’tB2.--MayIpickaflowerinthegarden?--________.A.No,youneedn’tB.Not,please.C.No,youmustn’tD.No,youwon’tCNeedIdo…?Yes,youmust.No,youneedn’t.3.dare&need情态动词实义动词dare否，疑，条darenotdo否,疑don’tdaretododon’tdaredo不用于肯定句肯：daretodoneed否，疑needn’tdo(don’t)needsth(don’t)needtodo肯：must,haveto,oughtto,should注意对need问句的回答:--NeedIfinishtheworktoday?--Yes,________________.No,________________.No,________________.youmustyouneedn’tyoudon’thavetoneedn’t对其它情态动词的回答:--ShallItellJohnaboutit?--No,you__________.--No,you__________.--Mustwedoitnow?--No,you__________.--No,you__________.needn’tdon’thavetoneedn’tdon’thaveto1.You______returnthebooknow.Youcankeepittillnextweekifyoulike.A.can’tB.mustn’tC.needn’tD.maynotC2.MustIdrivetohishouseandpickupthechildren?No,.A.youshouldn'tB.youmightnotC.youneedn'tD.youmustn'tC情态动词+havedone的用法1.Must+havedone表示对过去发生的事情作出的肯定判断1).他们在玩篮球，他们一定完成了作业。Theyareplayingbasketball,theymusthavefinishedtheirhomework.2.路是湿的。昨天晚上一定下雨了。Theroadiswet.Itmusthaverainedlastnight.2.can/couldhavedone在否定句对过去发生行为的可能性进行推测.1.刚才我还看见他了，所以他不可能出国的。Isawhimjustnowsohecouldn’thavegoneabroad.2.门是锁着的，所以她不可能在家。Thedoorwaslocked.Shecouldn’thavebeenathome.could(不用can)+havedone,在肯定句中表示“本来能够…而没能…”，具有婉转的批评和责备之意,1.Icouldhavepassedmyexameasily,butImadetoomanystupidmistakes.我本来能够轻易通过考试，但我犯了太多不该犯的错误。2.Youcouldhavereportedtomeearlier.你本该早点告诉我的。3.might/may+havedoneMay/mighthavedonesth表示对过去的可能性推测“过去可能做了某事”其程度小于musthavedonesth。不用于疑问句。Shemighthavebeenhitbyacarormotocycle.她可能是被一辆小气车或摩托车撞了。TheJinshaRuinsmayhavebeenthepoliticalandculturalcentreoftheancientShuKingdom.金沙遗址可能是古代蜀国的政治和文化中心。3.might+havedone表示“本来可能…”，但实际上没有发生的事。另外，还可表示“本来应该或可以做某事”之意，含有轻微的责备语气。1.Youmightnothavetoldher.你本可以不告诉他的。（事实上你告诉他了）2.Youmighthavecomeearlier.你本可以早点来的。（但没有这样）4.should/oughttohavedone表示责备或批评,意为“本应该做到…但没有做到…”,用于否定则表示“本不该…但”oughtto的语气更强烈.Youshould/oughttohavetoldherthetruthearlier.Sheshouldn’thaveleftwithoutsayingaword.needn’t+havedone表示做了本来不必去做的事。1.Sheneedn’thavegonetothestationyesterday.昨天她本不必到火车站去的.（昨天她去了）2.Youneedn’thaveboughtit.你本可不必买它的。（你买了）Individualactivity1.Wedidn'tseeTomatthemeetingyesterday.Heit.A.mustn'thaveattendedB.cannothaveattendedC.needn'thaveattendedD.wouldhavenotattendedB2.---Therewerealreadyfivepeopleinthecar,buttheymanagedtotakemeaswell.----It____acomfortablejourneyA.can’tbeB.shouldn’tbeC.mustn’thavebeenD.couldn’thavebeenD3Whereismypen?I____it.A.mightloseB.wouldhavelostC.shouldhavelostD.musthavelost4.Ididn’thearthephone.I___asleepA.mustbeB.musthavebeenC.shouldbeD.shouldhavebeenDB5.----Guesswhat!IhavegotAformytermpaper.----Great!You______readwidelyandputalotofworkintoit.A.mustB.shouldC.musthaveD.shouldhave6.Theteacher_______havethoughtJohnsonwasworthitorshewouldn'thavewastedtimeonhim,Isuppose.A.shouldB.canC.wouldD.mustCD7.She______haveleftschool,forherbikeisstillhere。A.can’tB.wouldn’tC.shouldn’tD.needn’tA8.Thankyouforallyourhardworklastweek.Idon’tthinkwe______itwithoutyou。A.canmanageB.couldhavemanagedC.couldmanageD.canhavemanagedB9.Whatapity.Consideringhisabilityandexperience,he____better。A.needhavedoneB.musthavedoneC.canhavedoneD.mighthavedoneD10.–Ican’tfindmypurseanywhere。--You____havelostitwhileshopping。A.mayB.canC.shouldD.wouldA11.----Mycat'sreallyfat.----You______havegivenhersomuchfood.[2007浙江卷]A.wouldn'tB.couldn'tC.shouldn'tD.mustn't12.—I’msorry.I______atyoutheotherday。—Forgetit.Iwasabitoutofcontrolmyself。A.shouldn’tshoutB.shouldn’thaveshoutedC.mustn’tshoutC.mustn’thaveshoutedBHomework:Finishexerciseonpage89.