现在完成时中短暂性动词与延续性动词的转换

.,现在完成时中(点动词)短暂性动词与延续性动词的转化,.,短暂性动词,也称做点动词、非延续性动词或瞬间动词。表示动作不能延续，只是一瞬间就结束的动作。,.,常见的短暂性动词,come,go,arrive,reach,see,hear,close,open,leave,begin,start,lose,buy,fall,join,die,become,borrow,getup等,.,.它们可以用于完成时态，说明某个动作的结果还存在,e.g.Hehascomeback.Thefilmhasbegun.,.,2.在否定句中，非延续性动词也可以用表示一段时间的状语来修饰,e.g.IhaventheardfromUncleWangforalongtime.Wehaventseenhimsince1992.Shehasntlefthomeallherlife.,.,在以下句型中，短暂性动词要转换成延续性动词：,现在完成时态的肯定句中，有for或since引导的，或其他种类的表示一段时间的时间状语,例如：Hehasdiedfor20years.这句话就是错误的。die是一个瞬间动词，需要转化为延续性动词。句子改为Hehasbeendeadfor20years.,非延续性动词要转换成延续性动词，方法主要有以下三种：,.,1.实义动词转化成实义动词,1.borrow,keep,2.buy,have,3.puton,wear,.,2.转化成be+形容词或介词,1.gothere,bethere,ehere,behere,eback,beback,4.die,bedead,5.leave,beaway(from),6.open,beopen,7.close,beclosed,8.go/getout,beout,.,9.finish/end,beover,10.become,be,11.getup,beup,12.begin/start(上演),beon,.,3.转化成be+名词（词组）,20.jointheParty,beintheParty,beaPartymember,beamemberoftheParty,.,21.jointhearmy,beinthearmy,beasoldier,.,句型转换:,Hisgrandfatherdiedfiveyearsago.,.,句型转换:,Hisgrandfatherdiedfiveyearsago.,Hisgrandfatherhasbeendeadforfiveyears.,Hisgrandfatherhasbeendeadsincefiveyearsago.,Itsfiveyearssincehisgrandfatherdied.,Fiveyearshaspassedsincehisgrandfatherdied.,.,Hisbrotherborrowedthebooktwoweeksago.,.,Hisbrotherborrowedthebooktwoweeksago.,Hisbrotherhaskeptthebookfortwoweeks.,Hisbrotherhaskeptthebooksincetwoweeksago.,Itstwoweekssincehisbrotherborrowedthebook.,Twoweekshaspassedsincehisbrotherborrowedthebook.,.,Hisbrotherjoinedthearmytwoyearsago.,.,Hisbrotherjoinedthearmytwoyearsago.,Hisbrotherhasbeeninthearmyfortwoyears.,Hisbrotherhasbeeninthearmysincetwoyearsago.,Itstwoyearssincehisbrotherjoinedthearmy.,Two