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ID:49885204
大小:1.37 MB
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时间:2020-03-03
《中考专项复习——现在完成时复习课件[1].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、现在完成时复习ReviewofthePresentPerfectTenseWelcome时态不同时间发生的动作,动词要用不同形式已学习过的时态名称时间动动词形式一般现在时平时,经常1.v原形2.v+s/es(三单现)现在进行时正在进行am/is/are+v-ing一般将来时即将,计划1.will/shall+v原形2.am/is/aregoingto+v原形一般过去时过去(与现在无关)1.v-ed(规则动词)2.不规则动词过去进行时过去某一时间,在进行was/were+v-ing1.v原形2.v+s/es(单三)am/is/are+v-
2、ing1.will/shall+v原形2.am/is/aregoingto+v原形1.v-ed(规则动词)2.不规则动词was/were+v-ing判断下列句子的时态1.Sheworksinafactory.2.Iwasdoingmyhomeworkatthistimeyesterday.3.WearegoingtohaveapicnicthisSunday.4.Theyheldasportsmeetinglastweek.5.Areyouhelpingyourmother.现在完成时表示到目前为止已经完成,并对现在留下某种后果和影响的
3、动作。现在完成时的构成:have/has+动词的过去分词注:动词过去分词的构成分为规则变化和不规则变化,规则变化的动词过去分词与过去式是一样的,不规则变化的动词须特殊记忆。规则动词过去分词的构成1.一般在动词后直接加-ed构成规则2.以不发音的e结尾的动词,直接加-d3.末尾只有一个辅音字母的重读闭音节词,先双写这个辅音字母,再加-ed4.结尾是“辅音字母+y”的动词,先变“y”为“i”再加-ed例词looklookedplayplayedlivelivedhopehopedstopstoppedplanplannedstudystud
4、iedcarrycarried写出下列动词的过去分词:worklikecrystaylearnusehelpfinishcookarriveworkedlikedcriedstayedlearnedusedhelpedfinishedcookedarrived不规则动词过去分词的构成1.三个主要动词is,ambearewaswerebeenhave/hashadhaddo/doesdiddone2.AAA型(三者一致)cutcutcutletletletputputputcostcostcostreadreadread3.ABA型(过去
5、分词与原形一致)comecamecomebecomebecamebecomerunranrun4.ABB型(过去分词与过去式一致)bringbroughtbroughtfindfoundfoundhearheardheardkeepkeptkeptmakemademade此外还有leave,win,tell,spend,say,meet等等。5.ABC型(三者不一致)eatateeatengivegavegivenwritewrotewrittenseesawseengetgotgottenbeginbeganbegun此外还有go,t
6、ake,know,speak,swim等等。现在完成时的用法:1.表示已完成的某一动作对现在造成的影响或结果1)标志词:already:yet:多用于陈述句,位于have/has后,有时位于句末。e.g.Ihavealreadyfinishedmyhomework.用于疑问句和否定句,位于句尾。e.g.Haveyoufoundyourlostbookyet?Ihaven'thadbreakfastyet.ever:never:多用于疑问句,问初次经历。e.g.HaveyoueverbeentoBeijing?用于否定句,位于have/h
7、as后e.g.Hehasneverarguedwithotherpeople.just:before:多用于陈述句,位于have/has后e.g.Lucyhasjustwashedherclothes.可用于各句式,位于句尾。e.g.Ihavereadthisbookbefore.Hehasn'tbeenabroadbefore.HaveyouflowntoHainanbefore?2)无标志词的:e.g.Heisnotfeelingwellnow.Hehascaughtacold.Ihavelostthekey.Ican'tgoint
8、omyroom.2.表示从过去已经开始,持续到现在的动作或状态。标志词:1)for+一段时间e.g.Wehavelivedinthiscityfortenyears.2)since+过去点时间since+一
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