初中现在完成时复习课件1.ppt
冬天来了，春天还会远吗？If winter has already come,can spring be far behind?现在完成时知识链接：八年级下册八年级下册Unit9Have you ever been to an amusement park?1.现在完成时的概念1）表示）表示过去发生过去发生或或已完成已完成的动作的动作对现在对现在造成的影响造成的影响或结果；或结果；2）表示过去已经开始并表示过去已经开始并一直持续一直持续到现在的动作或到现在的动作或状态。状态。E.g.He has learned English since 2001.pastnowfuture现在完成时现在完成时一般过去式一般过去式现在进行时现在进行时一般将来时一般将来时2.现在完成时的结构现在完成时的构成：Have/has+done助动词助动词过去分词过去分词主语+have/has+过去分词+其他Have:第一、二第一、二/复数复数Has:第三人称单数第三人称单数规则动词：规则动词：直，去，双，变直，去，双，变不规则动词不规则动词：AAA，ABB，ABA，ABC规则动词(1)一般动词，在词尾直接加“ed”。work-worked-worked,visit-visited-visited(2)以“e”结尾的动词，只在词尾加“d”。live-lived-lived(3)以“辅音字母+y”结尾的动词，将y变为i，再加“ed”。study-studied-studied,cry-cried-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-stopped,drop-dropped-dropped重点1：写出下列动词的过去式和过去分词Work_Live_Stay_Stop_Clean_Study_worked workedlived livedstayed stayedstopped stoppedcleaned cleanedstudied studied不规则动词AAA型costcostcost；cutcutcutAAB型beatbeatbeatenABA型runranrun；comecamecomebecomebecamebecomeABB型buyboughtbought；buildbuiltbuiltABC型beginbeganbegun；choosechosechosen3.现在完成时的否定与疑问现在完成时的否定式直接在助动词have或has后面加上not、疑问式是把助动词提到主语之前。否定句疑问句Ihavenot(havent)studied.HaveIstudied?Youhavenot(havent)studied.Haveyoustudied?Hehasnot(hasnt)studied.Hashestudied?例题例题Rewrite the sentences.1.IhavebeentoShanghaibefore.(改为否定句)I_beentoShanghaibefore.2.Hehasntcometoschoolbecausehewasill.(就划线部分提问)_hecometoschool?havenotWhyhasnt重点2：现在完成时态的否定与疑问比较havebeento/in和havegonetoHe has gone to Shanghai.他他(已经已经)去上海了。去上海了。He has been to Shanghai.他他(曾经曾经)去过上海。去过上海。have(has)beenin表示“在某地呆多长时间”，常与表示一段时间的状语连用，如：since,for,howlong等。例如：Mr.BrownhasbeeninShanghaiforthreedays.布朗先生来上海已经有三天了。小结词组含义搭配Havegoneto到某地去了，表示到了某地或正在去某地的途中。说话时该人不在现场Havebeento曾经去过某地，现在已经不在那里了。just,ever,neverHavebeenin在某地呆多长时间since,for,howlong1.Jane has _ to BeiJing.She will come back tomorrow.A.been B.never been C.went D.gone 2.Hello,this is Mr.Green speaking.Can I speak to Mr.Black?-Sorry.He _ the Bainiao Park.A.has been to B.has gone to C.went to D.will go to重点3havebeento/in和havegoneto的对比例题3.-_ you ever _ to the US?-Yes,twice.A.Have,gone B.Have,been C,Do,go D.were,going
