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1、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,fortwoyears;since从句,sincehecamehere;since+时间点名词,sincelastyear,sin
2、cefivedaysago;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。如：Ihaven’theardfromUncleWangforalongtime.
3、Wehaven’tseenhimsince1992.三．延续性动词与非延续性动词之间的转换：puton→wear或beonopen→beopen（keepsth.open）join→bein或beamemberof…+组织机构close→beclosedgotoschool→beastudentborrow→keepbuy/get→havecatch(acold)→have(acold)gettoknow→knowbegintostudy→studycometowork→workmoveto→liv
4、einfinish→beovercometo→beinsitdown→beseatedmarry→bemarrieddress→bedressedbecome→be一些短暂性动词及相应的延续性动词：arrive（getto/reach）→behere(in)begin(start)→beondie→bedeadcomehere（back）→behere（back）leave→beaway(from)fallill(sick,asleep)→beill(sick,asleep)getup→beupgo
5、/getout（there）→beout（there）finish→beover例:Theoldmandied4yearsago.--Theoldmanhasbeendeadfor4years.=---Itis4yearssincetheoldmandied.=---Fouryearshaspassedsincetheoldmandied.HejoinedtheParty2yearsago.=----HehasbeeninthePartyfor2years.Iboughtthebook5daysag
6、o.=--Ihavehadthebookfor5days.补充练习：1.Whenhearrivedatthebusstop,thebus________for20minutes.A.hasleftB.hadleftC.hasbeenawayD.hadbeenaway2.I______theLeague（共青团）for5yearssofar.A.joinedB.havejoinedC.havebeenin3.Thefactory________sincetheFebruaryof1988.A.hasb
7、eenopenB.hasopenedC.wasopenD.opened4.MaryandRose_______friendssincetheymetin2000.A.havemadeB.havebeenC.madeD.havebecome5.Youmustn't________untilhecomesback.A.beawayB.leaveC.beleft6.Themeeting_______foraweeknow.A.hasfinishedB.hasendedC.hasbeenover7.Miss
8、Gao______thisschoolfornearly5years.A.hasbeeninB.hascometoC.hastaught8.Ben______ateacherfor4years.A.hasbeenB.hasbecomeC.wasD.became9.I______homeforaweek.A.havereturnedB.havebeenbackC.returned10.Howlong_______he________?A.diedB.has,diedC.
