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单元语法专练现在完成时三
1.延续性动词延续性动词表示能够延续的动作如workkeephavesleeplivestay等可以与表示时间段的状语连用
2.非延续性动词非延续性动词又称短暂性动词或终止性动词表示不能延续的动作这种动作发生后立即结束如opendiecloseego等在肯定句中与表示时间点的状语连用在否定句中可以与表示时间段的时间状语连用
3.延续性动词与非延续性动词的转换非延续性动词的完成时态表示动作完成并产生了影响或结果一般不能与表示时间段的状语连用若与表示时间段的状语连用则要把非延续性动词变成相应的延续性动词常见动词的转化如下表:非延续性动词延续性动词非延续性动词延续性动词borrowkeepopenbeopenbuyhaveleavebeawayfrombeebediebedeadputonwearfinishbeovermovetoliveinreturnbebackrecognizeknowfallinbeinbegin/startbeonfallasleepbeasleepe/gobehere/theregetto/arrive/reachbeinebackbebackgettoknowknowgo/getoutbeoutgetupbeupcatchacoldhaveacoldgetmarriedbemarriedjoinbein/beamemberofshowbeon
4.since和for的用法since和for都可用于现在完成时for后面接一段时间表示动作的持续时间;since后面接时间点表示动作的起始时间点例如:Ihavebeenherefortwoyears.我已经在这里待了两年了Ihavebeenheresincexx.自xx年开始我就在这里Ⅰ.根据句意用for或since填空
1.Ihavekeptthedictionary for twoweeks.
2.Ihaven’theardfromhim since lastyear.
3.Myunclehastaughtatthisschool since tenyearsago.
4.AuntWangcameherelastyear.She’sbeenhere for aboutayear.
5.Greatchangeshavetakenplaceinmyhometown since Ileftthere. Ⅱ.根据句意用所给词的适当形式填空
1.I havebeen beatworksinceeighto’clockbutI’mleavingsoon.
2.We haven’tmet notmeeteachotherforfiveyears.Bothofus left leavethefactoryfiveyearsago.
3.I waited waitattherestaurantforanhourandthenIleft.
4.Wemustgetanewcar.We havehad havethisonefortenyears. Ⅲ.单项填空A
1.—Howlonghaveyou —Foralmost10years.A.ownedthisgardenB.boughtthiscarC.arrivedinShanghaiDetothistownC
2.—WillyouwatchtheprogramKeepRunninginZhejiangTVtonight—Yesofcourse.It oneofthemostpopularshowssincexx. A.wasB.becameC.hasbeenD.hasbeeA
3.SincexxModernFamily usthefunnysadandmovingstoriesofthreeAmericanfamilies. A.hasgivenB.willgiveC.gaveD.givesC
4.—Isthatanewcoat—NoI itforalongtime. A.boughtB.haveboughtC.havehadD.hadbought。