现在完成时课件(上课用)

ThePresentPerfectTense一)构成:have/has+动词过去分词三、过去分词的构成原形过去分词原形过去分词travelvisitmovestopstayfinishownshoplearnrepairtravelledmovedstayedownedlearnedvisitedstoppedfinishedshoppedrepairedA规则动词的过去分词•规则动词的过去分词的变化规律•1一般情况下，动词词尾加-ed，如：•work---workedplay---played•want----wantedact----acted•2、以不发音的-e结尾动词，动词词尾加-d，如：•live---livedmove----moved•taste---tastedhope---hoped•3、以辅音字母+y结尾的动词，把-y变为-i再加-ed，如：•study---studiedcopy---copied•cry---criedcarry---carried•4、以一个辅音字母结尾的重读闭音节动词，双写词尾辅音字母，再加-ed，如：stop---stopped•动词过去分词记忆口诀：•一加ed，二加d•三要双写，四注意：y变成ied.1.work-workedopen-openedanswer-answered2.hope-hoped3.drop-droppedstop-stopped4.study-studiedB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不规则动词原型-过去式-过去分词形式：1）AAA型(三种都一样)如：costcostcostcutcutcuthurthurthurtshutshutshutsetsetset2）ABB型(过去式与过去分词相同)如:bring-brought-broughtcatchcaughtcaughtleadledled3）ABC型(三种都不一样)如：begin-began-begungrowgrewgrownringrangrungbreakbrokebroken4）ABA型(原形与过去分词相同)如:come-came-comebecomebecamebecomerunranrunI.写出下列动词的过去分词形式.1.wake______2.teach______3.sell________4.see________5.ride_______6.pay_____7.choose______8.throw_____9.think_______10.eat_____11.drive______12.catch______13.bring______14.break______15.give_______16.get_________17.know_______18.open_______19.write_______20.forget________WokentaughtSoldseenRiddenpaidChosenthrownThoughteatenDrivencaughtBroughtbrokenGivengottenKnownopenedWrittenforgotten二)含义:(一)表示过去发生的动作或事情对现在的影响和产生的结果.它强调的是过去的动作同现在的联系.常用的时间状语有already,yet,ever,never,just,before等.(定义二)表示一个从过去开始,一直持续到现在,有可能继续下去的动作或状态.通常和for或since引导的时间状语连用.句式构成1.肯定句:S(主语）+have/has(助动词）+PP(过去分词)+(其他）。2.否定句:S(语)+have/has+not+PP(过去分词)+(其他）。3.一般疑问句Have/has+S(主语)+PP(过去分词)?Yes,S+have/has.No,S+have/hasn’t.（改为否定句和一般疑问句并肯否回答)Ihaveseenhimsincehisweddingday.→Ihaven’tseenhimsincehisweddingday.→Haveyouseenhimsincehisweddingday?•HehaswrittentomesinceIhavebeenill.(改为一般疑问句)→Hashewrittentoyousinceyouhavebeenill?→Hehasn’twrittentomesinceIhavebeenill1.现在完成时中标志词的用法区别1.Already肯定句:句中(助后实前)/句末“己经”一般疑问句:句末(表示惊讶的语气)“难道”Eg.I’vealreadyhadbreakfast.(更常见)=I’vehadbreakfastalready.(表示强调)Haveyouhadbreakfastalready?注:有already的句子在时态上并不都是现在完成时,判断时要看该词后是否有动词的过去分词.Eg.She’salreadyeightyyearsold.Itwasalreadyverylate.2.yet在现在完成时中的用法否定句:句末“还(没)”疑问句:句末“己经”Eg.Ihaven’thadbreakfastyet.Haveyouhadbreakfastyet?注:带already的肯定句变成否定句或疑问句时,将already要变成yet放在句末.Eg.Ihavealreadydonemyhomework.否定句:一般疑问句:Ihaven’tdonemyhomeworkyet.Haveyoudoneyourhomeworkyet?3.ever在现在完成时中的用法肯定句/疑问句:句中“曾经”Eg.I’veeverbeentoBeijing.HaveyoueverbeentoBeijing?4.never在现在完成时中的用法否定句:句中“从来没有”Eg.I’veneverbeentoBeijing.注:带ever的肯定句变否定句时,要将ever变成never;带ever的一般疑问句作否定回答时可用“No,never.”Eg.Hehasevermadedumplings.否定句:Havetheyevertravelledbytrain?No,never.Hehasnevermadedumplings.5.just在现在完成时中的用法用于句中,表示“刚刚”Eg.I’vejusthadbreakfast.Whathavetheyjustdone?6.before在现在完成时中的用法用于句末,表示“以前”Eg.I’veseenitbefore.Hassheriddenabikebefore?(定义二)表示一个从过去开始,一直持续到现在,有可能继续下去的动作或状态.通常和for或since引导的时间状语连用.1.for+Eg.Ihavebeenherefor5weeks.He’sstudiedEnglishfor3years.一段时间2.since+从句(一般过去时)词组(表示过去某一时间的)时间点Eg.Ihavebeenheresince2000.Ihavebeenheresince5yearsago.IhavebeenheresinceIgraduatedin2000.注2):对for或since引导的时间状语提问必须用howlong,决不能用when.Eg.Ihavelivedherefor10years.Howlonghaveyoulivedhere?Shehasstoodheresince2hourago.Howlonghasshestoodhere?注3):短暂性动词不能和for或since引导的时间状语连用,当然也不能用于howlong引导的问句中.Eg.(误)Ihavelefttherefor5years.(正)Ihavebeenawaytherefor5years.※短暂性动词与延续动词间的转换5.短暂动词和延续动词转换短暂性动词延续性动词becomefinishreturngo/leaveopen/closebegin/startenddiecatchacoldbecomeinterestedingetmarriedbebeoverbebackbeaway(from)beopen/beclosedbeonbeoverbedeadhaveacoldbeinterestedinbemarried瞬间动词vs延续动词瞬间性动词延续性动词putongetupwakeupfallasleepjoinarrive/reachwear/beonbeupbeawakebeasleepbein=beamemberofbein/at练习•判断：他到达车站半个小时了•Hehasarrivedatthestationforhalfanhour()Hehasbeenatthestationforhalfanhour.orHearrivedatthestationhalfanhouragoHe_______theLeaguesincetwoyearsagoA.JoinedB.hasjoinedC.hasbeenin翻译：这个电影已经放映十五分钟了——------------------------------------------------------------Thefilmhasbeenonforfifteenminutes.have/hasbeento，have/hasgoneto，have/hasbeenin的用法区别1“Have/hasbeento+地名”表示曾经去过某地，说话时已经回到说话地点，常与once、twice、ever、never等时间连用。2“have/hasgoneto+地名”表示去某地了，现在没有回答，人不在说话地点。3“have/hasbeenin+地名”表示“在某地”。指一种存在状态巧记：beento，gonetobeenin意不同，三者用法要记清；have/hasbeento+地名，曾经到过某地行；have/hasgoneto+地点，到某地去了已走远。have/hasbeenin+地名，已经在某地了。•用have/hasbeento和have/hasgoneto填空•1.—Hi，Lucy，youeverBeijing？•—No，I.•2.—Whataboutyoursister，Lily？•—Oh，sheChengdu，•shewillcomebacknextweek.•—Ok，thanks.•—You’rewelcome.havebeentohaven’thasgoneto四)Itis+一段时间+since+句子(一般过去时)=一段时间+haspassed+since+句子(一般过去时)Eg.ItisfiveyearssinceIjoinedthearmy.=FiveyearshaspassedsinceIjoinedthearmy.练习自从我来到这正好两天ItisjusttwodayssinceIcamehereTwodayshaspassedsinceIcamehereIt___________(be)tenyearssinceI_________(finish)middleschool.is\hasbeenfinished（一）现在完成时与一般过去时的区别现在完成时表示过去发生或已经完成的某一动作对现在产生的影响或结果，强调的是现在的情况。所以它不能和表示过去时间状语连用；而一般过去时只单纯表示过去的动作或状态，和