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现在完成时(课堂教学设计)一:现在完成时的定义和基本句式结构:通过例句导入,引导学生找出两个例句的不同之处,引出现在完成时的定义。Isawthefilmyesterday.(强调昨天看了这部电影)Ihavealreadyseenthefilmthreetimes.(强调已经看过这部电影,潜台词是对这部电影情节较熟悉了或是不想再看了)定义:1.过去发生并且已经完成的动作对现在造成影响或后果。2.过去某一时间开始并一直持续到现在并且有可能还会持续的动作或状态。结构:have/has+V过去分词例句:1、Ihaveplayedbasketballfor2years.2、Hehasdancedfor5years.3、Ihaven’tseenherthesedays.二:动词过去分词的构成:1.规则变化:(1)一般动词,在词尾直接加“-ed”。work---worked---worked(2)以不发音的“e”结尾的动词,只在词尾加“d”。live---lived---lived(3)以“辅音字母+y”结尾,将y变为i,再加“-ed”。study—studied—studied(4)重读闭音节结尾,末尾只有一个辅音字母(r、y、x除外),先双写该辅音字母,再加“-ed”。stop—stopped—stopped2.不规则变化:AAA型cut-cut-cutlet-let-letAAB型beat-beat-beatenABA型become-became-becomeABB型bring-brought-broughtdig-dug-dugABC型break-broke-broken练习:写出下列所给单词的过去式及过去分词cost_______meet______get______teach______control_______study______stop______live_______三、现在完成时的否定句及一般疑问句形式:例句:Hehasdancedfor5years.否:Hehasn’tdancedfor5years.一般疑问句:----Hashedancedfor5years?-----Yes,hehas./No,hehasn’t.练习:1、Juliahasgonehome.(改为一般疑问句)____Julia_____home?2、JimhasbeentoJapanbefore.(改为否定句)Jim_________toJapanbefore.3、MyparentshasbeentoHainanfortheirholidays(对画线部分提问)____________yourparents______fortheirholidays?四、现在完成时的时间标志词例句导入:Hehasnevermetthatkindofperson.Mymomhaschangedmybedroomalready.Haveyoufinishedyourhomeworkyet.Haveyouevermettheperson?现在完成时的时间标志:标志词中文释义用法位置already已经肯定句句末、动词与助动词之间yet还没有(否定句),已经(疑问句)否定句、疑问句句末ever曾经疑问句主语之后,动词与助动词之间never从不任何句式(表否定)动词与助动词之间just刚刚肯定句动词与助动词之间sofar到目前为止任何句式句首、句尾练习:1、Haveyou_______beentoshanghai?A、yetB、everC、already2、Haveyoufinishedyourworkbook______?A、alreadyB、yetC、never3、He______seenthefilm,sohedoesn’twanttoseeitagain.A、hasB、hasn’tC、have4、------_____theywateredtheflowers?------Yes,theyhave.A、DoB、DoesC、HaveD、Has五、现在完成时的重难点突破:难点(1):for和since的用法区别例句导入:Lookatthetwopicturesandfindthedifferencebetweenthem.(家乡变化的图片)引出:Ourhometownhaschangedsince10yearsago.Ourhometownhaschangedfor10years.Ourhometownhaschangedsince2008.OurhometownhaschangedsinceIcamehere.总结:for和since的用法区别for后面跟时间段。since后面跟过去的时间点、或者一段时间+ago、或者一般过去时的从句。用since和for填空。练习:1、Ihavebeenhere______2000.2、Ihavebeenhere_______5yearsago.3、Ihavebeenhere_______10years.4、Ihavebeenhere_______Iwasborn.难点(2):瞬间性动词和延续性动词的转换瞬间性动词不能和for、since连用,需要转换成延续性动词。转换方式如下:瞬间性动词延续性动词diebedeadbecomebeleavebeawayfromborrowkeepbuyhavejoinbeinmarrybemarried给出例句:Tom’sfatherhasbeendeadfor4years.Janehaskeptthebookforaweek.填空练习:1、Whenhearrivedatthebusstop,thebus_____(leave)for20mins.2、I______(join)theleaguefor5yearssofar.3、Ben______(become)ateacherfor4years.难点(3):hasgoneto与hasbeento的区别例句导入:1、IhavebeentoBeijing.2、-------Ican’tseeTom.Whereishe?-------Hehasgonetothelibrary.3、IhavebeeninBeijingsinceIwasborn.总结句型:have/hasbeento去了(已回)have/hasgoneto去了(未归)have/hasbeenin在某段时间一直待在某地练习:用have/hasbeento,have/hasgoneto,have/hasbeenin填空1、------Janeisn’there.She_______________London.------She______________theremanytimes.2、I________________BeijingforfiveyearsandIlikethecityalot.难点(4)现在完成时和一般过去时的区别(通过例题来导出):1、--------Haveyouseenthefilmbefore?--------Yes,I_________itlastnight.A、haveseenB、hasseenC、saw2、--------Haveyouseenthefilmbefore?--------Yes,I_________itthreetimes.A、haveseenB、hasseenC、saw时态用法时间状语一般过去时过去某时间发生的动作或存在的状态,与现在无联系。与表示过去的时间连用,如:yesterday,lastweek,twoyearsago,justnow,in2010等。现在完成时过去的动作对现在的影响或结果;或过去开始延续到现在的动作或状态,与现在有联系。与不明确表示过去的时间连用,如:already,yet,just,recently,ever,before,inthepast+时间段,for+时间段,since+时间点等。练习:1、Lilyismyclassmate.We______eachothersinceshecametoourschool.A、knowB、knewC、haveknownD、willknow2、Julia’sfather_______toLondonlastmonth.He_______therethreetimes.A、went;havegoneB、went;hasbeenC、hasgone;wentD、hasbeen;went3、Mother_____meanewcoatyesterday.I________iton,itfitsmewell.A、hadmade;havetriedB、made;havetriedC、made;triedD、made;tried4、BythetimeI______backthey_____uptensatellites.A、came;havesentB、came;hadsentC、come;havesentD、hadcome;sent
本文标题:现在完成时教案
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