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1、ThePresentPerfectTense现在完成时一.（结构）肯定句:主语+have/has+V-pp+其他否定句:主语+have/has+not+V-pp+(其他）一般疑问句:Have/has+主+V-pp?肯定回答：Yes,主+have/has.否定回答：No,主+haven’t/hasn’t.二、过去分词的变化1.一般-edworked，called2.哑音e-dlived,liked,loved3.以辅元辅结尾，双写末尾辅音字母-edplanned,stopped４.以辅音字母＋y结尾
2、,变y为i-edtry-tried,study-studied,cry-cried三、特征词：already(肯定句)yet(否定句和疑问句)never，ever(疑问句)just(谓语动词之前)before(句末）sofar=uptonow=bynow（迄今为止）inthepast/lastfewyears(过去几年来)thesedays（这些天）eversince（自从，从那时起）for+一段时间（fortwoweeks）since+过去的时间点（since8:00）since＋一段时间＋ag
3、o(sincetwoweeksago)since+从句(一般过去时)用for和since填空:1.Wehaven’tseeneachother______alongtime.2.Hisfatherhasbeeninthefactory______10yearsago.3.Thefilmhasbeenon______20minutes.4.MrGreenhasworkedhere______hecametoChina.5.Hisgrandparentshavebeendead______severa
4、lyears.6.Itisfiveyears_______wemetlasttime。forsinceforsinceforsince四、用法:表示过去发生的某一动作对现在造成的影响或结果Eg:Ihavealreadyseenthefilm.我已经看过这部电影了。（还记得内容）Jimhasjustlosthisbook.吉姆刚才把书丢了。（还没找到）2.表示从过去某一时刻开始并一直延续到现在的动作或状态,但动作或状态可能仍在继续Eg:.Shehaslivedheresinceshewasborn.
5、WehavelearntEnglishfortwoyears.时态填空：1.We____already_____(copy)thesewords.havecopied2.Jim_______________(just,watch)afootballmatch.Heissotiredandhungry.hasjustwatched3.______youever_______(travel)onatrain?Havetravelled4.---______they_______(see)thefilm
6、yet?---Yes.They_____________(see)italready.Haveseenhaveseen5.----________hersister____________(be)toShanghai?----No,she_________(never,be)therebefore.Hasbeenhasneverbeen五、短暂性动词与时间段的关系短暂性动词在肯定句、疑问句中不能与时间段连用，Eg：become(成为),begin（开始）,buy（买）,borrow（借）,arri
7、ve（到达）,come（来）,go（去）,die（死）,finish（完成）,join（加入）,leave（离开）,marry（结婚）,open（打开）,close（关闭）等。要表达这种意思，我们要转换成相应的延续性动词来代替短暂性动词.buy→borrow→arrive/come/go→leave→join→die→become→begin/start→非延续性动词转化为延续性动词havekeepbebeaway(from…)bein…/beamemberof…bedeadbebeonhadke
8、ptbeenbeenbeenbeenbeenbeenbeenhas/have短暂性转换延续性:()1.---HowlongcanI____thisbook?---Twoweeks.A.borrowB.keepC.lendD.return()2.Herfather_____formorethanfiveyears.A.diedB.hasdiedC.hasbeendeadD.hasdied()3.Ihave___thisbookfortwoyears.A.hadB.boughtC.bo
