unit2 healthy eating grammar情态动词

Grammar情态动词情态动词表示推测不表示推测cancouldmaymightshallshouldmustwillwouldoughttohavetoneed(needn’t)dare(daren’t)usedto表示推测——情态动词的重要用法肯定的推测可能的推测否定的推测疑问的推测must对将来对现在对过去情态动词may,mightcan’t,couldn’tcan,could+V.+V.+havedone常见mustbe+bedoing+V.+V.+havedone+bedoing可以用not表示“可能不”+V.+V.+havedone+bedoing+V.+V.+havedone+bedoinge.g.Youngpeopleshouldlearnhowtousecomputers.Everycitizenoughttoobeylaw.Yououghtnottogo.should常表示劝告、建议、命令，与oughtto意义相近，但oughtto多表示责任、义务，语气强烈。在疑问句中通常用should代替oughtto。must&havetomusthaveto主观／客观主观客观时态现在，将来多种表推测√×询问意愿√×否定意禁止，不允许不必must&havetomust用于一般问句中,肯定回答用must否定式用needn’t或don’thaveto，做“不必”,mustn’t表示“禁止，不允许”e.g.—MustIfinishallassignmentsatatime?—Yes,youmust.No,youneedn't.Youmustn’tgetoffwhilethecarisstillmoving.must+havedone表示对过去已经发生的行为进行推测，意为“想必/准是/一定作了某事”。1.Itmusthaverainedlastnight,fortheroadwasverymuddy.昨晚一定是下雨了，因为地上很泥泞。2.Wemusthavelearned2,000wordsbytheendoflastterm.到上学期为止我们一定学了有两千个单词。3.HemusthavegonetoBeijing.他一定已经去北京了。can/could+havedone表示对过去的行为的怀疑和不肯定，通常用在否定句和疑问句中。1.Cantheyhavewonthebasketballmatch?他们可能赢了篮球赛吗？2.Itcouldn’thavebeenMr.Green.HehasgonetoNewYork.那不可能是格林先生的，他已经去北京了。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。may/might+havedone表示对过去已发生行为的推测，意为“也许/或许已经…”。一般只用于肯定句和否定句中，不用于疑问句。might比may更委婉、含蓄和不肯定。1.It’stoolate.Ithinkhemayhavegonetobed.太晚了，我想他可能已经睡觉了。2.Hemay/mightnothavefinishedthework.他可能没有完成工作。might（不用may）+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）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）1.---Iwonderwhytheyarelate?---They_____thetrain.A.can’thavemissedB.couldmissC.musthavemissedD.mightmissC2.Oh,I’mnotfeelingwellinthestomach.I____somuchfriedchickenjustnow.A.A.shouldn’teatB.shouldn’thaveeatenB.C.mustn’teatD.mustn’thaveeatenB5.---HasMikestarted?Hesaidhewouldjoinintheparty.---He____.Heisamanofkeepinghisword.A.couldhaveleftB.musthaveleftC.can’tcomeD.won’tbecoming6.---Therewerealreadyfivepeopleinthecar,buttheymanagedtotakemeaswell.---It___acomfortablejourney.A.can’tbeB.mustn’thavebeenC.shouldbeD.couldn’thavebeenBD7.---Whyhasn’tJanearrivedyet?---She____againinthemorning?A.shouldn’thaveoversleptB.mayhaveturnedoffthealarmclockC.musthavenoonetocallherD.shouldhavesomeonetowakeherup8.---Didyougotothemoviethedaybeforeyesterday?----No.We___,butwedecidednotto.A.shouldhavegoneB.couldgoC.shouldgoD.couldhavegoneBA情态动词考题:1.---Didthetrainarriveintime?----No.It_______twohoursago.A.musthavearrivedB.oughttohavearrivedC.mustarriveD.oughttoarrive2.MustIdrivetohishouseandpickupthechildren?No,.A.youshouldn'tB.youmightnotC.youneedn'tD.youmustn'tBC3.Wedidn'tseeTomatthemeetingyesterday.Heit.A.mustn'thaveattendedB.cannothaveattendedC.needn'thaveattendedD.wouldhavenotattendedB4.You________suchalongcomposition.Theteacheronlyaskedfor300words.Youhavewritten600.A.mustn’thavewrittenB.couldn’thavewrittenC.needn’thavewrittenD.donothavetowriteC5.Thereissomeoneknockingatthedoor.itbeTom?A.canB.mustC.shouldD.oughtto6.Twoyearsago,myhusbandboughtmeabicycle.Ifyouliveintown,itisoftenfasterthanacarandyouworryaboutparking.A.mustnotB.maynotC.shouldnotD.don'thavetoAD