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1、Module4 Seeing the doctorUnit 3 Language in use一、Learningaims:Howlonghaveyou…?你做某事多久了？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。Ihave…fortwodays/sincetwodaysago.表示时间段的短语有:for+一段时间,for2years;since从句,sincehec
2、amehere;since+时间点名词,sincelastyear,since5daysago;howlong;foralongtime等。例:Hehaslivedherefor6years.Youcankeepthebookfor5days.Istayedtherefor2weekslastyear.Howlongdidyoustaytherelastyear?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,
3、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;例:Hedied5yearsago.否定的终止性动词可以与表示时间段的时间状语连用。例:Ihaven'tleftherefor3years.Ihaven'theardfromhimfor3weeks.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,bea
4、memberof+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→hav
5、eacold等。例:（1）Theoldmandied4yearsago.----Theoldmanhasbeendeadfor4years.----Itis4yearssincetheoldmandied.----Fouryearshaspassedsincetheoldmandied.（2）HejoinedtheParty2yearsago.-----HehasbeeninthePartyfor2years.（3）Iboughtthebook5daysago.----Ihavehadthebookfor5days.一、预习自测：语法专练1.Whenhear
6、rivedatthebusstop,thebus_______for20minutes. A.hasleft B.hadleft C.hasbeenaway D.hadbeenaway 2.I______theLeaguefor5yearssofar. A.joined B.havejoined C.havebeenin 3. Thefactory________sincetheFebruaryof1988. A.hasbeenopen B.hasopened C.wasopen D.opened 4.
7、 MaryandRose_______friendssincetheymetin2000. A.havemade B.havebeen C.made D.havebecome 5.Youmustn't________untilhecomesback. A.beaway B.leave C.beleft 6.Themeeting _______foraweeknow. A.hasfinished B.hasended C.hasbeenover 7.MissGao______thisschoolfornear
8、ly5years. A.hasbeenin B.h
