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延续性动词与非延续性动词及其转换。动词按其动作发生的方式、发生过程的长短可分为延续性动词与非延续性动词。一.延续性动词表示能够延续的动作,如：learn,work,stand,lie,know,walk,keep,have,wait,watch,sing,read,sleep,live,stay等。延续性动词可以与表示时间段的状语连用。表示时间段的短语有:for+一段时间,for2years;since从句,sincehecamehere;since+时间点名词,sincelastyear,since5daysago;howlong;foralongtime等。二.非延续性动词也称终止性动词、瞬间动词,表示不能延续的动作,这种动作发生后立即结束。如:open,die,close,begin,finish,come,go,move,borrow,lend,buy等。非延续性动词在肯定句中与表示时间点的状语连用，如：twoyearsago;at5o'clock;否定的终止性动词可以与表示时间段的时间状语连用。三.延续性动词与非延续性动词之间的转换：leave---beaway,borrow---keep,buy---have,begin/start---beon,die---bedead,finish---beover,join---bein+组织机构,beamemberof+组织机构,opensth---keepsthopen,fallill---beill,getup---beup,catchacold---haveacold,comehere---behere,gothere---bethere,become---be,comeback---beback,fallasleep---beasleep,getto/arrive/reach---be(in),leave---beawayfrom,gettoknow---know,go(get)out→beout，puton→wear；catchacold→haveacold等。四.五.例:Theoldmandied4yearsago.----Theoldmanhasbeendeadfor4years.----Itis4yearssincetheoldmandied.----Fouryearshaspassedsincetheoldmandied.HejoinedtheParty2yearsago.-----HehasbeeninthePartyfor2years.Iboughtthebook5daysago.----Ihavehadthebookfor5days.补充练习：1.Whenhearrivedatthebusstop,thebus________for20minutes.A.hasleftB.hadleftC.hasbeenawayD.hadbeenaway2.I______theLeaguefor5yearssofar.A.joinedB.havejoinedC.havebeenin3.Thefactory________sincetheFebruaryof1988.A.hasbeenopenB.hasopenedC.wasopenD.opened4.MaryandRose_______friendssincetheymetin2000.A.havemadeB.havebeenC.madeD.havebecome5.Youmustn't________untilhecomesback.A.beawayB.leaveC.beleft6.Themeeting_______foraweeknow.A.hasfinishedB.hasendedC.hasbeenover7.MissGao______thisschoolfornearly5years.A.hasbeeninB.hascometoC.hastaught8.Ben______ateacherfor4years.A.hasbeenB.hasbecomeC.wasD.became9.I______homeforaweek.A.havereturnedB.havebeenbackC.returned10.Howlong_______he________?A.diedB.has,diedC.has,beendead11.He______ateightyesterdayafternoon.A.sleptB.wassleepingC.hassleepD.hadslept12.He________thecarforaweek.A.boughtB.hasboughtC.hashad13.-----Howlong_____you_____ill?-----Twoweeks.A.didfallB.have,fellC.have,been14.Since2000,he_____hishometown.A.hasleftB.hasmovedawayC.hasbeenawayfrom15.I'lllendyouthebook,butyoucanonly_____itfor2days.A.borrowB.keepC.take16.Thebus______ontheroadfor2hourssofar.A.hasstoppedB.stoppedC.hasbeen17.Areyou_____thejacketthesedays?A.wearingB.puttingonC.dressingD.on18.He________foe2hours.A.gotupB.hasgotupC.hasbeenup19.Tomisillinhospital.He_______acoldforseveraldays.A.isB.catchesC.hascaughtD.hashad20.-----HowlongcanI______thebook?------Twoweeks.A.borrowB.lendC.getD.keep情态动词专项复习()1.MrWang______beinNanjingnow,hewenttoBeijingonlythismorning.A.mustn’tB.maynotC.can’tD.needn’t()2.–MustIsatyathome,Mum?--No,you______.A.needn’tB.mustn’tC.don’tD.maynot()3.–Canyougoswimmingwithusthisafternoon?--Sorry,Ican’t.I_____takecareofmylittlesisterathomebecausemymotherisill.A.canB.mayC.wouldD.haveto()4.–MayIgotothecinema,Mum?--Certainly.Butyou______bebackby11o’clock.A.canB.mayC.mustD.need()5.Tomakeourcitymorebeautiful,rubbish______intotheriver.A.needn’tbethrownB.mustn’tbethrownC.can’tthrowD.maynotthrow()6.–MayIgoouttoplaybasketball,Dad?--No,you______.Youmustfinishyourhomeworkfirst.A.mustn’tB.maynotC.couldn’tD.needn’t()7.–WhereisJack,please?--He_____beinthereadingroom.A.canB.needC.wouldD.must()8.–Whoisthemanoverthere?IsitMrLi?--No,it______behim.MrLiismuchtaller.A.musn’tB.maynotC.can’tD.needn’t()9.Thesebooks______outofthereadingroom.Youhavetoreadthemhere.A.can’ttakeB.mustbetakenC.cantakeD.mustn’tbetaken()10.–Mum,mayIwatchTVnow?--Sure,butyou______helpmewithmyhouseworkfirst.A.canB.mayC.mustD.could()11.TheboysaidhehadtospeakEnglishinclass,buthe______speakitaftercalss.A.couldB.didn’thavetoC.mightD.shouldn’t()12.–Mustwehandinthepapersnow?--No,you______.A.can’tB.maynotC.mustn’tD.needn’t()13.John______gotherewithustonight,butheisn’tverysureaboutit.A.mustB.canC.willD.may()14.Eventhetopstudentsinourclasscan’tworkoutthisproblem.Soit______beverydifficult.A.canB.mayC.mustD.need()15.Putonmoreclothes.You______befeelingcoldwithonlyashirton.A.canB.couldC.wouldD.must()16.It’sstillearly.You______.A.mustn’thurryB.wouldn’thurryC.maynothurryD.don’thavetohurry()17.–MayIstophere?--No,you______.A.mustn’tB.mightnotC.needn’tD.won’t()18.Acomputer______thinkforitself,itmustbetoldwhattodo.A.can’tB.couldn’tC.maynotD.mightnot()19.–CouldIborrowyourdictionary?--Yes,ofcourseyou_______.A.mightB.willC.canD.should()20.Peter______comewithustonight,butheisn’tverysureyet.A.mustB.mayC.canD.will()21.Michael______beapoliceman,forhe’smuchtooshort.A.needn’tB.can’tC.shouldD.may()22.______Iknowyourname?A.MayB.WillC.ShallD.Must()23.You______bemorecarefulnexttime.A.havetoB.mayC.mustD.might()24.You______missthelesson,thoughwe______haveitonThursday.A.mustn’t;needn’tB.needn’t;mustn’tC.mustn’t;mustn’tD.needn’t;needn’t()25.Thispenlookslikemine,yetitisn’t.whose______itbe?A.mustB.mayC.wouldD.can()26.Whatkindsofhomeswillweliveinthefuture?Nobody______besure,butscientistsareworkingoutnewideasnow.A.willB.mayC.canD.must()27.I______liketoknowwhereyouwereborn.A.shallB.