现在完成时态.ppt

《现在完成时态.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、TalesoftheunexplainedUnit1Grammarandusage现在完成时态have/has+过去分词PresentperfecttenseThestructureofthePresentPerfectTenseis:subjectaux.vmainv+IhaveseenET.+Youhaveeatenmine._ShehasnotbeentoRome._Wehavenotplayedfootball.?HaveyoufinishedIt??HashedoneIt?通常使用现在完成时的几种情况：1表示发生在过去对现在仍有影响的动作。Wehavealr

2、eadycleanedtheclassroom.ThedisappearanceofJustinhasmadeKellyveryunhappy.Ihavealreadyreadthebook.Theboyhascomeback.2.表示一个刚刚完成的动作TheyhavejustreturnedfromFrance.3表示过去发生反复多次的动作。ThecityisveryfamiliartomebecauseIhavevisitedittwice.Youdon’tneedtodescribeher,forIhavemetherseveraltimes.Thismonth

3、IhavebeentoBeijingfor5times.常与twice,threetimes等连用4表示过去开始的动作或状态一直延续到现在表示动作只能用于某些带有延续意义的动词。Shehastaughtheresincetenyearsago.Since1949,Chinesepeoplehavelivedabetterlife.Wehavebeeninthisschoolfor3months.WehavelearnedEnglishfor10years.瞬间动作要用否定式才能延续Ihaven’tseenherfor3years.Ihaven’tseenhersinc

4、elastyear.since+时间点for+时间段thesedaysrecentlysofarinthepastfewyearslatelybynow延续性与非延续性动词：判断正误：延续性动词常与for,howlong,since等引导的表示一段时间的状语或状语从句连用。一些非延续性动词如come,go,leave,die,join,marry等用于现在完成时，一般不可以与表示一段时间的时间状语连用，此时应改为意义相近的延续性动词来表达。1Hehasdiedfor3years.2Hehasbeendeadfor3years.3Hedied3yearsago.4Ith

5、asbeen3yearssincehedied.5Howlonghaveyouborrowedit?FTTTFkept注意：非延续性动词的否定形式可以与表示延续时间的状语连用。即动作不发生的状态是可以持续的。判断正误：（）Ihavereceivedhisletterforamonth.（　　）Ireceivedthisletteramonthago.（）Ihaven'treceivedhisletterforalmostamonth.错对对1.I’llgiveyouthebookassoonasI______________(finish)it.2.Ifyou____

6、_________(see)thefilm,youwilllikeit.3.I’llgotothepartyassoonas(orwhen)I_____________(finish)myhomework.havefinishedhaveseen5.在时间或条件从句中表示在将来某个时间前要完成某个动作havefinished1We_____________(study)Englishforaboutfiveyears.2They______________(live)inthesouthsincetheirdaughterwasborn.3I___________(r

7、ead)yourarticlethreetimes.It’swellwritten.4Thestudent_________________(finish)herhomeworkalready.5Thepolice____________________(justfinish)searchingthearea.havestudiedhavelivedhavereadhasfinishedhavejustfinished现在完成时的时间标志1不表示具体或确定时间的一些状语往往可成为现在完成时的标志。（1）already和yetalready一般用于肯定