初中现在完成时讲解.ppt

初中现在完成时讲解,Rebecca,PresentPerfectTens现在完成时,1:过去发生的事情一直持续到现在；(现在还在做)有尾巴IstudiedEnglishthreeyearsago.IhavestudiedEnglishsincethreeyearsago.2:过去发生的事情已经结束，影响持续到现在；(现在不再做)无尾巴Ihavereadthenovelmanytimes.,现在完成时和一般过去时区别,1:现在完成时:藕断丝连2:一般过去时:一刀两断过去现在,主语+have/has+过去分词（pp）,助动词,无意义,现在完成时的结构,Winterhasalreadycome，,肯定形式:主语+have/has+过去分词,否定形式havent(havenot）+过去分词hasnt(hasnot)+过去分词,疑问句把助动词have/has放在句首Haveyou?肯定:Yes,主语+have/hasHashe/she/it?否定:No,主语+havent/hasnt,现在完成时的结构,注：主语若是第三人称单数助动词用has,上一页,下一页,如何判断有尾巴?,主菜单,since+过去的时间点；since1990for+一段时间;forayearsofar,uptonow;untilnow;Inthelast/pastfewyearsThesedays/weeks/years,1:找延续性时间状语,2:谓语动词表示状态（延续性动词或短暂性否定式）,Johnhasboughtapairofshoesforayear.(had)Johnhasntboughtapairofshoesforayear.,上一页,下一页,如何判断无尾巴?,主菜单,Johnhashadapairofshoesforayear.Johnhasboughtapairofshoes,1:无延续性时间状语,2:动词可以用短暂性动词,Johnhasboughtapairofshoes.,两者有何不同呢?,时间标志词:already;yet;just;before;recentlylately;never;ever;once;manytimes,常见时间标志词讲解,1already往往用于肯定句，用在疑问句时表示强调或加强语气；Hehasalreadylefthere.他已经离开这里了。Hashealreadylefthere?他（真的）已经离开这里了吗？（表示加强语气）,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.Ihaventhadbreakfastyet.Haveyouhadbreakfastyet?,3never是否定词，表示“从来没有”，而ever表示“曾经”,WehaveneverbeentotheGreatWall.我们从来没有去过长城。HaveyoueverbeentoCanada?你们曾经去过加拿大吗？,4just表示“刚刚”（用于完成时态时，与already，never等副词的位置一样，多用在助动词have/has和动词过去分词之间）,Hehasjustcomeback.他刚刚回来。Theyhavejustfinishedthework.他们刚刚完成那项工作。,1、regularverbs规则变化（过去分词与过去时变化规则一样）,(1)、一般动词，在词尾直接加“ed”。work-worked-workedvisit-visited-visited(2)、以“e”结尾的动词，只在词尾加“d”。live-lived,过去分词动词变化,(3)、以“辅音字母+y”结尾的动词，将“y”变为“i”，再加“ed”。study-studied-studiedcrycried-cried(4)、重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加“ed”。stop-stopped-stoppeddrop-dropped-dropped,2、irregularverbs不规则变化（A-B-B）,havehadhadspendspentspentmakemademadesaysaidsaidfindfoundfoundhearheardheard,3、不规则变化（A-B-C）,taketooktakenspeakspokespokensingsangsungdrivedrovedrivenbewas/werebeengowentgone,4、不规则变化（A-A-A）,cutcutcutputputputletletletreadreadread,5不规则变化(A-B-A)comecamecomebecomebecamebecome,Ivealreadyhaddinner.I_dinner_.2.Hehasjustfinishedhishomework.He_hishomework_.3.Mumscookedthedinner.Mum_thedinner.4.SusanslearnedEnglishatschool.Susan_Englishatschool.,把下列句子改为否定句,Ivealreadyhaddinner.2.Hehasjustfinishedhishomework.3.Mumscookedthedinner.4.SusanslearnedEnglishatschool.,把下列句子改为一般疑问句,Ivealreadyhaddinner.2.Hehasjustfinishedhishomework.3.Mumscookedthedinner.4.SusanslearnedEnglishatschool.,对划线部分提问,第一节课堂出门测试,1:Hisfather_thepartysince1978A.joinedB.hasjoinedC.wasinD.hasbeenin2：_you_yourhomeworkyet?Yes.I_itamomentago.A.Did;do;finishedB.Have;done;finishedC.Have;done;havefinished3.Myfriendsaidhewouldwritetome,butI_anylettersfromhimsofar.A.wontreceiveB.haventreceivedC.hadntreceivedD.didntreceived4.Mrs.WengcamebackfromFrancein2010.She_thereforfouryears.A.worksB.workedC.hasworked5.Ourcountry_thesixthpopulationcensus(人口普查)already.A.finishedB.hasfinishedC.willfinishD.finishes,中考三大考点,a:时间标志词（for,since区别）b:非延续性动词和延续性动词转换c:have/hasbeento和have/hasgoneto区别,since:(自以来)1)since+时间点Hehasstayedheresince5oclock.2)since+时间段+agoHehasstayedheresince5hoursago.3)since+从句ShehastaughtEnglishsincehecamehere.for:(长达）for+时间段Hehaskeptthebookfor2weeks.,since,for的用法区别:,用for或since填空,Mr.BrownhashadhisTV_15years.Ivetakendrivinglessons_lastmonth.Mysisterhashadhercellphone_amonth.Myfriendshaventvisitedme_fewdaysago.Shehasnthadagoodcupofcoffee_years.Tomhaswornglasses_hewas7yearsold.,短暂性动词与延续动词间的转换,1.Whenhearrivedatthebusstop,thebus_for20minutes.hasleftB.hadleftC.hasbeenawayD.hadbeenaway2.I_theLeaguefor5yearssofar.A.joinedB.havejoinedC.havebeenin3.Thefactory_sincetheFebruaryof1988.A.hasbeenopenB.hasopenedC.wasopenD.opened4.MaryandRose_friendssincetheymetin2000.A.havemadeB.havebeenC.madeD.havebecome5.Youmustnt_untilhecomesback.A.beawayB.leaveC.beleft,练习题,辨析havebeento和havegoneto,MyfatherhasgonetoShanghaiforameeting.他（已经）去了上海。,MyfatherhasbeentoShanghaiforameeting.他（曾经）去了上海。,ShehasbeentoChina.她（曾经）去过中国。（人已经回来了）,havebeentosomeplace.曾经去过某地，已经回来hasgonetosomeplace.某人去了某地，还没有回来,ShehasgonetoChina.她去了上海。（人可能回来了也可能没回来）,用have/hasbeento,have/hasgoneto填空：1.Whereisyourbrother?He_theshop.Hellbebacksoon.2._youever_toAmerica?Yes,I_NewYorktwice.3.Hereyouareatlast!Where_you_?I_London.4.David_Australia.Imsurehesalreadyarrived.5.IsBennyhere?No,he_theschoollibrary.Heleftfiveminutesago.,做题方法小妙招,一看时间标志词:显性时间标志词(提问?)Eg:I_(study)Englishsincethreeyearsago.二看其他谓动词:句子里面谓语动词时态Eg:I_(apply)forajobasaguide,butIwasntsuccessful.三看结果一致否:发生动作与现在结果是否一致Eg:Thetownisverydifferentnow.It_(change)alot.,第二节课出门测试测试,1.Whereismybike?It_(be)outsidethehouse,butitsnottherenow.2.They_(go)away.TheyllbebackonFriday.3._(you/finish)paintingthebedroom?-Notyet.Illfin