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1、Presentperfecttense现在完成时态一、现在完成时谓语动词的构成：助动词have/has(not)+V-ed（过去分词）I______________(finish)thecompositionalready.He___________(learn)Englishforthreeyears.We/You/They….She….havefinishedhaslearned过去分词的构成规则形式--ed不规则形式repair-repaired---e+d(见表格121双写辅音+edstop/mop/travel▲现在完成时态的含义
2、是表示过去发生的或已完成的动作对现在造成的影响或结果。特点是既涉及过去，又联系现在：动作是过去发生的，结果是现在存在的。Shehasgone.(她走了。)从这句话中动词所用的现在完成时态可以看出“走”的动作是过去发生的，而对现在所造成的结果是她不在这里了。HespeaksFrenchsofluently.HelearneditinParis.Hewastherefortwoyears.HehasstudiedFrench.(他学过法语。)这句话所说明的结果是他现在懂法语。Look!Theblackboardissocleannow.Heha
3、scleanedtheblackboard.(他已经擦过黑板了。)这句话所表示的结果是黑板现在是干净的。现在完成时用法（一）过去的(结束性)动作产生的影响或结果现在还存在。常用短暂性动词做谓语动词.如arrive,get,finish,borrow,open,stop,begin,go,come,die,fall,…时间状语常用already,just,yet,ever,before,once(一次),recently等不具体的过去时间或不带有时间状语I________(do)myhomeworkalready.He____________
4、_(notfinished)hishomeworkyet._______youever______(be)toHaiwaii?We______never______(see)suchanexcitingmatchbefore.Mother_____just_______(clean)thehouse.Pleasedon’tcomein.They_________________(practice)thisdialoguetwice.havedonehasnotfinishedHavebeenhaveseenhascleanedhavepra
5、cticedI_____________(nothear)fromheryet._____they_______(be)hererecently?Yes,theyhave.I___________(be)busyrecently.---_____yourfatherever______(travel)toNewYork?---No,never.He__________________(nottravel)byplaneyet.haven’theardHavebeenhavebeenHastravelledhasn’ttravelled注意：
6、当在肯定陈述句中含有already或just时，在转换成否定句或疑问句时，要把句中的already或just去掉，在句末加上yet.Ihaven’tseenthefilmnamedKingLionyet.●Ihavedonemyhomeworkalready.Ihaven’tdonemyhomeworkyet.●Motherhasjustcleanedthehouse.Motherhasn’tcleanedthehouseyet.●IhavealreadyseenthefilmnamedKingLion.For….Since…Howlong
7、have/hassb…….? lived learnedownedThedoorhasbeenopenforawholeday.Thewindowshavebeenclosedsince7:30Ihavehadthisbikeforayear/sincelastyear.Myteachershavebeenbusy/freethesedays.现在完成时用法二:过去开始的动作或状态一直持续到现在1.常用延续性动词,如be,sleep,live,learn,stay,have,keep,work,walk,…2.时间状语须表达过去到现在的一段
8、时间.fortwoyearssofarsince短语,duringthepast2yearssince从句inthepast2years表示一段时间的主要结构2000lastwe
