延续动词与非延续动词动词按其动作发生方式、发生过程长短可分为延续性动词与非延续性动词。一.延续性动词表示能够延续动作,如：learn,work,stand,lie,know,walk,keep,have,wait,watch,sing,read,sleep,live,stay等。延续性动词能够与表示时间段状语连用。二.非延续性动词也称终止性动词、瞬间动词、短暂性动词,表示不能延续动作,这种动作发生后马上结束。如:open,die,close,begin,finish,come,go,move,borrow,lend,buy等。使用方法：3、还可改用普通过去时来表示．非延续性动词能够转换成延续性动词，主要有以下几个：Themeetingstarted15minutesago.Themeetinghasbeenonfor15minutes.Thetrainlefthalfanhourago.Thetrainhasbeenawayforhalfanhour.Hebegantoteachhere16yearsago.Hehastaughtherefor16years.JamesstartedtoworkforMAPAdvertisinglastyear.JameshasworkedforMAPAdvertisingforayear.Hestartedtoplaychessattheageoffive.Hestartedtoplaychesswhenhewasfive.Hehasplayedthechesssincehewasfive.Hehasplayedthechessforsevenyears.Istartedtoworkhere15yearsago.Ihaveworkedheresince15yearsago.Ihaveworkedherefor15years.TheymovedtoParistwoyearsago.Theyhavelivedherefortwoyears.Theyhavelivedheresincetwoyearsago.1.Iboughtthebooktwodaysago.Ihavehadthebookfortwodays.2.Heborrowedthebookthreemonthsago.Hehaskeptthebooksince3monthsago.3.IgottoknowJane2yearsago.IhaveknownJanefor2years.4.IjoinedtheLeaguethreeyearsago.IhavebeenaLeaguememberfor3years.巩固练习：（同义转换，每空一词）3.Thefactoryopenedin1996.Thefactorytenyears.Thefactorysince1996.4.Hisgrandfatherdiedfiveyearsago.Hisgrandfathersince.Hisgrandfatherfiveyears.fiveyearshisgrandfatherdied.Fiveyearshisgrandfatherdied.5.Mr.WangreachedBeijingfivedaysago.Mr.WangBeijingfivedaysago.Mr.WangBeijingfivedays.6.Thefilmbegantenminutesago.Thefilmfor.Thefilmsince.7.Kenjoinedthearmytwoyearsago.Kenhas_____________fortwoyears.Kenhas_______thearmyfortwoyears.8.Thefilmbegan10minutesago.Thefilmhas________for10minutes.9.Igotacoldtwodaysago.Ihave____acoldsincetwodaysago.10.Thefilmfinished5minutesago.Thefilmhas________for5minutes.11.Themancameheretenminutesago.Themanhas____herefor10minutes.12.LindaandFrank(got)marriedin1989.They_________________since1989.13.Helefthishometown10yearsago.Hehas_______________hishometownsince10yearsago/for10y