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Unit10I’vehadthisbikeforthreeyears.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work,keep,have,sleep,live,stay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open,die,close,come,go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borrowkeepopenbeopenbuyhaveleavebeawayfrombecomebediebedeadputonwearfinishbeovermovetoliveinreturnbebackrecognizeknowfallinbeinbegin/startbeonfallasleepbeasleepcome/gobehere/theregetto/arrive/reachbe(in)comebackbebackgettoknowknowgo/getoutbeoutgetupbeupcatchacoldhaveacoldgetmarriedbemarriedjoinbein/beamemberofshowbeon4.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。Ihavebeenheresince2005.自2005年开始我就在这里。Ⅰ.根据句意用for或since填空1.Ihavekeptthedictionaryfortwoweeks.2.Ihaven’theardfromhimsincelastyear.3.Myunclehastaughtatthisschoolsincetenyearsago.4.AuntWangcameherelastyear.She’sbeenhereforaboutayear.5.GreatchangeshavetakenplaceinmyhometownsinceIleftthere.Ⅱ.根据句意用所给词的适当形式填空1.Ihavebeen(be)atworksinceeighto’clock,butI’mleavingsoon.2.Wehaven’tmet(notmeet)eachotherforfiveyears.Bothofusleft(leave)thefactoryfiveyearsago.3.Iwaited(wait)attherestaurantforanhour,andthenIleft.4.Wemustgetanewcar.Wehavehad(have)thisonefortenyears.Ⅲ.单项填空(A)1.—Howlonghaveyou?—Foralmost10years.A.ownedthisgardenB.boughtthiscarC.arrivedinShanghaiD.cometothistown(C)2.—WillyouwatchtheprogramKeepRunninginZhejiangTVtonight?—Yes,ofcourse.Itoneofthemostpopularshowssince2015.A.wasB.becameC.hasbeenD.hasbecome(A)3.Since2009,ModernFamilyusthefunny,sadandmovingstoriesofthreeAmericanfamilies.A.hasgivenB.willgiveC.gaveD.gives(C)4.—Isthatanewcoat?—No,Iitforalongtime.A.boughtB.haveboughtC.havehadD.hadbought