复件 8B U1grammar.ppt

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1、8BUnit1GrammarPresentPerfectTense(1)Wehavejusthada20-dayholiday.Freetalk(aboutthewinterholiday)Ihavehadagoodtimethesedays.Wehavecomebackatschool.Thepresentperfecttense现在完成时hasnot=havenot=（1）肯定式：（2）否定式：havehesheitIweyoutheyhashas/have+V-pp(动词的过去分词)has/havenot+V-pphaven’thasn’t现在完成时的基本构成

2、：Haveyoueverdroppedlitterinapark?（3）一般疑问句：Has/Have主语+V-pp…?Yes,…has/have.No,…hasn’t/haven’t.动词的过去分词形式1.规则动词2.不规则动词finish--finished--finishedlive--lived--livedcarry--carried--carriedstop—stopped--stoppedgo—went—gonesee---saw—seenforget—forgot–forgotten…规则动词的过去分词变化与过去式相同不规则变化须单独记忆原形过去分词原

3、形过去分词travelvisitmovestopstayfinishownshoplearnrepairtravel(l)edmovedstayedownedlearnedvisitedstoppedfinishedshoppedrepairedA规则动词的过去分词B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feelbringfallwearflysinghavef

4、orgetdrinkkeepfeltfallenflownhaddrunkbroughtwornsungforgottenkeptHespeaksFrenchsofluently.HelearneditinParis.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。用法1：表示过去开始的动作或状态对现在造成了结果。（结果还存在）1.Theman______

5、_______(read)thebook3times.2.She______________(live)inNanjingbefore.3.She______________(visited)hererecently.4._____sheever_______(told)youthat?No,she_______never_______(tell)me.5.Today,she______just_______(have)aMathslesson.6.I____already________(finish)myhomeworkbutshe_______________

6、_(notfinish)hersyet.hasreadhaslivedhasvisitedHastoldhavefinishedhastoldhashadhasn’tfinishedFillintheblanks:常用时间状语：already,just,yet,ever,never,before(句末)Timeexpressionswiththepresentperfecttensealreadyyetjustnevereverrecently肯定句已经还，已经，仍否定句，疑问句刚刚肯定句从不，绝不，不曾否定句曾经肯定句，疑问句肯定/否定句，疑问句最近汉语意思适用

7、句式（肯，否，疑问）Fillintheblankswith“just,yet,never,already,ever,recently”Haveyoudoneyourhomework____?Ihave_____beentoChengdu.Iknownothingaboutit.Hehas____stayedthere.Heleftamomentago.Theyhave_____heardaboutthestory.Shehasbeenill________.Haveyou____riddenahorse?yetneveralreadyrecentlyjustev