译林版八年级英语下册Unit1-Grammar课件

UnitIPastandpresentGrammarDoyoustillrememberthefollowingsentences?Haveatry!你看见我的食物了吗？你已经吃了我的食物！你变了！从我出生我就住在这儿。从那时起我们就住在这个地区。RevisionThePresentPerfectTense(现在完成时)一、现在完成时的含义现在完成时用来表示之前已发生或完成的动作或状态，其结果和现在有联系，动作或状态发生在过去但它的影响现在还存在；也可表示持续到现在的动作或状态；还可以表示一个动作到现在为止发生了多少次。二、现在完成时的构成

现在完成时的肯定句句型:主语（第一、二人称单复数）+have+过去分词

We

havelivedinNanjingfor10years.e.g.I

havefinishedmyreport.主语（第三人称复数）+have+过去分词e.g.They

havemovedaway.主语（第三人称单数）+has+过去分词e.g.He

hasbeeninBeijingfortwomonths.

2.现在完成时的否定句句型主语+have/has+not+过去分词

e.g.Ihavenotseenthefilmyet.Hehasn’tbeentoTianjinsincethen.3.现在完成时的一般疑问句

句型Have/Has+主语+过去分词

Haveyou….?Hashe….?Yes,Ihave.Yes,hehas.No,Ihaven’t.No,hehasn’t.

三、现在完成时的时间副词和时间短语1.副词already和yet。already一般用于肯定句中，yet一般用于否定句和疑问句中。如:Wehavealreadyfinishedourhomework.

我们已完成作业了。Theyhaven'tfinishedtheirhomeworkyet.

他们还没有完成作业。-IhaveneverwatchedtheWorldCup.

我从未看过世界杯。2.副词ever和never。多用于否定或疑问句中，表示“曾经”或“从未“等。

如:-HaveyoueverwatchedtheWorldCup?

你曾经看过世界杯吗?Hehasbeentheretwicethelastfewdays.近几天他去过那里两次了。3.用表示到说话时为止的时间状语,

如:just,before,uptonow,thepast/lastfewyears等。如:Ihaveseenherbefore,butIcannotrememberwhere.

我以前见过她，但记不起在哪里见过。如:Ihaven'tseenhimfortwoyears.Ihaven’tseenhimsince2yearsago.It’s2yearssinceIsawhim.

我两年没有见过他了。4.表示动作或状态从某一时刻开始，一直持续到现在的时间状语:sofar,for+一段时间,since+过去时间或一般过去时的句子。already肯定句中，否定句中变为yet.ever肯定句或疑问句中for各种句型，后加时间段,howlong提问just肯定句中never表示否定，句中since各种句型，后加过去的时间点或过去的时间状从句，howlongyet否定句或疑问句句尾recently各种句型句尾四、过去分词的构成原形过去分词原形过去分词travelvisitmovestopstayfinishownshoplearnsolvetravelledmovedstayedownedlearnedvisitedstoppedfinishedshoppedsolvedA.规则动词的过去分词Weadd‘-ed’toregularverbs.Mostverbs+edvisit→visitedVerbsendingine+dlive→livedVerbsendingin

aconsonant+y-yiedcarry→carriedShortverbsendinginavowel+aconsonantdoubletheconsonant+edstop→stoppedB.不规则动词的过去分词原形过去分词原形过去分词thinkputcatchcostgivegrowmakehurtwriterunthoughtcaughtgivenmadewrittenputcostgrownhurtrun原形过去分词原形过去分词feelbringfallwearflysinghaveforgetdrinkkeepfeltfallenflownhaddrunkbroughtwornsungforgottenkept

动词原形 动词过去式 动词过去分词ABB bring brought broughtABC do did doneAAA let let letABA comecame comeAAB beat beat beaten123FinishP14PartAMrWuasksthestudentstocompletethesentencesbelowusingthepresentperfecttense.Helpthemcompletethesentences.1.They_____________(finish)theirhomeworkalready.2.John____never______(visit)China.3.MrLi____________(repair)overtenbicyclessinceMonday.4.We____________(notsee)eachotherforyears.havefinishedhasvisitedhasrepairedhaven’tseen5.Myparents_____________(notcome)backyet.6.Ourteacher__________(teach)usalotaboutthehistoryofChina.haven’tcomehastaughtMillieandSandyaretalkingaboutafilmaboutthehistoryofBeijing.Completetheirconversationwiththecorrectformsoftheverbsinbrackets.Millie:______you_____(see)anyfilmsrecently,Sandy?Sandy:No,Ihaven’t.Whataboutyou?Millie:I_____(see)onelastSaturday.Sandy:What’sitabout?HaveseensawMillie:It’saboutthechangesinBeijingoverthepastcentury.Fromthisfilm,I____________(learn)moreab