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《For和since.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、现在完成时for和since的用法小结现在完成时中，当动作发生在过去,目前仍在继续或刚刚结束常和“for”加上“一段时间”,或“since”加上“一个确切的过去的时间”连用。for和since的区别Since用来说明动作起始时间，for用来说明动作延续时间长度。Ihavelivedhereformorethantwentyyears.IhavelivedheresinceIwasborn..IhaveknownXiaoLisinceshewasalittlegirl.MybrotherhasbeenintheYouthLeaguefortwoyears.Co
2、mmunicationsacrosstheAtlantichavedevelopedsteadilyforonehundredyears.Hehasbeentalkingabouttheaccidentsinceithappenedtwohoursago.注意：并非有for作为时间状语的句子都用现在完成时。Iworkedhereformorethantwentyyears.(我现在已不在这里工作。)Ihaveworkedhereformanyyears.(现在我仍在这里工作。)a)“for”用于过去的一段时间.(动词必须是可以延续的)Hehasbeenthe
3、reforsixmonths.她去那儿有6个月了。(直到现在)Hewentthere6monthsago.Hehasneverbeenthere.他从来都没去过那里。(直到现在)b)"since"用于过去的一个确切的时间,意思是"从那时一直到现在",总是和完成时一齐用,而且不能省略.(主句动词必须是可以延续的)TimhasbeeninNantongsinceJanuary.自从1月份以来他一直都在南通。(现在仍在南通)注意:“since”后面的确切的过去的时间也可以是一个含有过去时的从句.Hehasbeeninterestedincollectingcoin
4、ssincehewasachild.他打小时侯起就对收集硬币感兴趣。（现在还是如此）小窍门：当现在完成时+一段时间，这一结构中，我们用下面的公式转化，很容易就能排除非延续动词在完成时中的误使。1)(对)TomhasstudiedRussianforthreeyears.=TombegantostudyRussianthreeyearsago,andisstillstudyingitnow.2)(错)Harryhasgotmarriedforsixyears.=Harrybegantogetmarriedsixyearsago,andisstillgettin
5、gmarriednow.显然，第二句不对，它应改为Harrygotmarriedsixyearsago.或Harryhasbeenmarriedforsixyears.I.翻译：他死了已经3年了。1.Hedied3yearsago.2.Hehasbeendeadfor3years.3.Hehasbeendeadsince3yearsago.4.Itis3yearssincehedied.5.Threeyearshaspassedsincehedied.II.Completethesentences,using"for"and"since":1.we,stud
6、y,English,(fiveyears,1982)WehavestudiedEnglish____fiveyears.WehavestudiedEnglish____1982.2.he,work,inthisfactory,(morethantenyears,1976)Hehasworkedinthisfactory____1976.Hehasworkedinthisfactory___morethantenyears.forforsincesince3.it,notrain,(alongtime,October)Ithasn’trained_____Oc
7、tober.Ithasn’trained_____alongtime.4.i,notplay,football,(lastSunday,aweek)Ihaven’tplayedfootball_____aweek.Ihaven’tplayedfootball_____lastSunday.5.Ihaven’tmether_____Iarrivedhere.forforsincesincesinceIII.Askquestionsabouttheunderlinedparts:1.MissBrownhaslivedinChinafortenyears.____
8、____hasMissBrownlivedinChi
