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1、I’vehadthisbikeforthreeyears单元语法聚焦十since和for的用法现在完成时常和since或for引导的时间状语连用，此时的谓语动词要用延续性动词。1．since后面可以接表示过去的时间点，也可以接表示过去的从句。表示从过去某一时间开始直到现在的一段时间。如：TonyhastaughtEnglishinourschoolsincelastyear.自从去年，托尼就在我们学校教英语。TonyhastaughtEnglishinourschoolsincehecametoCh
2、inalastyear.自从去年来到中国，托尼就在我们学校教英语。2．for后面可以接一个表示时间段的短语，表示动作或状态延续多长时间。如：WehavelivedinBeijingforthreeyears.我们已经住在北京三年了。3．since和for的相互转换：(1)since＋一段时间＋ago＝for＋时间段 如：Ihavekeptthebooksincetwoweeksago.＝Ihavekeptthebookfortwoweeks.(2)since＋时间点＝for＋时间段 如：It's10
3、o'clocknow.Ihavebeenheresince8o'clock.＝It's10o'clocknow.Ihavebeenherefortwohours.4．常用的since句型：(1)since＋从句(常用一般过去时) 如：TheGreenshavelivedinBeijingsincetheymovedtoBeijingfromParis.自从他们从巴黎搬到北京后，格林一家一直住在北京。(2)Itis/hasbeen＋一段时间＋since＋从句(常用一般过去时)．如：Itis/hasbe
4、entwoyearssincemybrotherjoinedthearmy.我哥哥参军已有两年了。[拓展]短暂性动词在肯定句、疑问句中不能与时间段连用，如become,begin,buy,borrow,arrive,come,die,fall,finish,go,join,leave,marry等。为了表述这种意思，我们常用相应的延续性动词have,keep等来代替非延续性动词。如：Ihaveboughtthebookforaweek.(×)Ihavehadthebookforaweek.(√)我买
5、这本书一周了。( )1.xx·眉山—Areyouabasketballplayerinyourschool?—Yes.I________theteam3yearsago.I________initfor3years.A．joined;wasB．wasjoined;amC．havejoined;havebeenD．joined;havebeen( )2.xx·桂林Daming________inthisplacesincetwoyearsago.A．havelivedB．haslivedC．liv
6、es( )3.xx·武汉—Doyoustillplaybasketball?—Oh,no.I________itforthepasttwoyears.A．haven'tplayedB．didn'tplayC．won'tplayD．hadn'tplayed( )4.xx·乐山—I'msorryforbeinglate.—Nevermind.Themeeting________foronly5minutes.Thisway,please.A．hasbegunB．hasendedC．hasbeenon
7、( )5.xx·龙东—Hurryup,themovieWolfWarriorⅡ________for10minutes.—OK,I'mcomingrightnow.A．beganB．hasbegunC．hasbeenon( )6.xx·上海ThefilmOperationRedSea________alotofpraisesinceitsfirstshowmonthsago.A．winsB．winC．willwinD．haswon( )7.xx·北京Lilyismyclassmate.We__
8、______eachothersinceshecametoourschool.A．knowB．knewC．haveknownD．willknow( )8.xx·黄石—Whereisyouruncle,Jane?—HeisinGuangzhou.He________foramonth.A．hasleftB．hasgoneC．leftD．hasbeenaway教师详解详析1．D 2.B 3.A 4.C 5.C 6.D7．C 考查动词的时态。根据从句“sincesheca
