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….havefinishedhavefinishedhaslearnedhaslearned▲现在完成时态的含义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.Hehascleanedtheblackboard.(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。这种用法常与already,just,yet,ever,never,before(句末)等连用.•I________(do)myhomeworkalready.•He_____________(notfinished)hishomeworkyet.•____youever_____(be)toBeijing?•We______never______(see)suchanexcitingmatchbefore.•Mother_____just_______(clean)thehouse.Pleasedon’tcomein.•They_________________(practice)thisdialoguetwice.havedonehasnotfinishedHavebeenhaveseenhascleanedhavepracticed注意：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’tseenthefilmyet.●Ihavedonemyhomeworkalready.Ihaven’tdonemyhomeworkyet.●Motherhasjustcleanedthehouse.Motherhasn’tcleanedthehouseyet.●Ihaveseenthefilmalready.用法2：表示动作或状态从过去开始一直延续到现在甚至将来Mikeborrowedthebookstwodaysago.Mikehaskeptthebooksfortwodays.切记有些动词是非延续的，在此用法中要换成其相对应的延续性动词：buyborrowopencloseleavediejoinbegin---have--keep---beopen---beclosed--beaway---bedead--beamemberof---beonget/come/arrive—getup--finish—wake--fallill--become–catchacold--beinbeupbeoverbeawakebeillbehaveacold1.电影已开始十分钟了.2.这工厂开业一年了.3.他参军有3年了。4.这辆车你买了多久了。5.Jim离开家乡１０年了．6.他们到北京有两天了．Thefilm________________for10minutes.Thefactoryhas...
