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1、延续性动词与非延续性动词在现在完成时中的运用一、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,如：for2years，foralongtime;since从句,如：sincehecamehere;since+时间点名词,如：sincelastyear,since5daysago;howlong等。二.非延续性动词也称终止性动词、瞬间动词或点动词,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(start),finish,come,go,move,borrow,lend,buy等。非延续性动词在肯定句
2、中与表示时间点的状语连用，如：twoyearsago;at5o'clock;eg：Hedied5yearsago.三、延续性动词与终止性动词之间的转换1、用相应的延续性动词替换句中的终止性动词：borrow---keep,buy---have,become/come/go---be,catchacold---haveacold,opensth.---keepsth.open,puton--wear,eg.Iboughtthebook5daysago.Ihavehadthebookfor5days.2、将终止性动词转换为be+介词短语begin/start---beon,
3、finish---beover,join---bein+组织机构/beamemberof+组织机构,gotoschool—beinschool,getto/arrive/reach/come/go/move---bein/at+sw.puton—beoneg.Hehasbeeninschoolfor9years.3、将终止性动词转换为be+名词jointhearmy—beasoldier,jointheLeague/Party—beaLeague/Partymembergotoschool—beastudenteg.HejoinedtheParty2yearsago.H
4、ehasbeeninthePartyfor2years.4、用be+adj./adv.结构替换非延续性动词close/open—beclosed/open,come/goback/return---beback,comehere---behere,die---bedead,fallasleep---beasleep,fallill--- beill,finish/end/complete→beover,gothere---bethere,go/leave---beaway（from）,go(get)out→beout,getup---beup,marry→bemarri
5、ed, move—beoutofeg.Theoldmandied4yearsago.Theoldmanhasbeendeadfor4years.5、去掉短语中的结束性动词begintostudy—study,cometowork=work,gettoknow---know,eg：Wehaveknowneachotherfor3years.6、用“Itis/Hasbeen+time+since…”句型表达原句的内容。但主句一般用现在时或完成时，since引导的时间状语或短语从句用一般过去时。eg：Itis/Hasbeenthreeyearssincewegottoknow
6、eachother.7，用“time+havepassedsince…”句型表达同样的意思。eg.Hehasbeenawayhishometownfor5years.Fiveyearshaspassedsincehelefthishometown.8，把一时间状语改为过去时间状语，原动词的完成时改为过去一般时。eg.Helefthishometownfiveyearsago.他参军三年了。Hehasjoinedthearmyfor3years.Hehasbeeninthearmyfor3years.Hehasbeenasoldierfor3years.Itis/Hasb
7、een3yearssincehejoinedthearmy.Hejoinedthearmy3yearsago.1.我买这本书三年了。(1).Iboughtthebookthreeyearsago.(2)Ihavehadthebookfor3years.(3)Ihavehadthebooksince3yearsago.Howlonghaveyouhadthebook?2.他借这本书两个月了（1）Heborrowedthebooktwomonthsago.(2）Hehaskeptthebookfor2months.(3)Hehaskeptth
