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PresentPerfectTense用来表示现在之前已发生或完成的动作或状态，其结果和现在有联系。动作或状态发生在过去,但影响到现在或将来；也可表示持续到现在的动作或状态。构成:have/has+过去分词现在完成时PresentPerfectTensehas/have+pastparticipleIhavebeentoJapan.Wehaveknowneachother.Hehasfoundhisbook.规则动词的过去分词workvisitaskplaystayworkedvisitedaskedplayedstayedlikedlivedmovedlikelivemovecarriedworriedtriedcriedcarryworrytrycrystopdroprobplanpreferstoppeddroppedrobbedplannedpreferred三式相同不规则动词的过去分词costcuthithurtsetputshutreadbringbuythinkteachcatchbroughtboughtthoughttaughtcaughtbroughtboughtthoughttaughtcaughtfeelleavetellsellsaylayfeltlefttoldsoldsaidlaidfeltlefttoldsoldsaidlaidbeginfallflyforgettakewearwritecomebecomeruncamebecamerancomebecomerunbeganfellflewforgottookworewrotebegunfallenflownforgottentakenwornwrittenFormsofthepresentperfectStatement：have/has+p.p.Negative：have/hasnot+p.p.Question:Have/Has+sub.+p.p...?•----Haveyouseenthefilm?----Yes,I.----No,I.•e.g.Ihavefinishedmyhomework.•否定句：Imyhomework.•一般疑问句：youhomework?•肯定回答：Yes,I.•否定回答：No,I.•haven’tfinishedHavefinishedyourhavehaven’thavehaven't肯定：Shehasseenthefilm.否定：Shehasn't(hasnot)seenthefilm.疑问：----shethefilm?----Yes,she.----No,she.e.g.Shehasfinishedherhomework.否定句：Sheherhomework.一般疑问句：sheherhomework?肯定回答：Yes,she.否定回答：No,she.hashasn'thasn’tfinishedHasfinishedhashasn’tHasseenTimeyesterdayHehurthisfingeryesterday.Hehashurthisfinger.SimplePastPresentPerfectTime??????hurtTimethismorningHefoundhiscatthismorning.Hehasfoundhiscat.SimplePastPresentPerfectTime??????findthethief/takeawaymymoney(lastnight)(take—taken)he/catchabigfish(thismorning)(catch—caught)mother/washdishes(at6:00)(wash---washed)TimeSimplePastPresentPerfectTimeyesterday/lastweek/in1976/justnow/whenIcamein…/twodaysagonever/ever/yet/already/before/just/lately/sofar/recently/thesedays/sincetwodayago1.already(已经）(not)yet(还没有…）…yet?(…已经…吗？）；2.never(从不）,ever（曾经）3.just（刚刚）before(从前，以前）4.recently/lately（近来/最近）,inthelast/pastfew(days/weeks/months/years)在最近的几…5.thesedays/weeks/months（这些…来）6.sofar=uptonow（迄今为止，到目前为止）7.for+一段时间8.since+过去的时间(自从…到现在）•Shehasalreadycome.•Ihavemethimbefore.•Sofar,nomanhastraveledfartherthanthemoon.•Ihaven’tfinishedmyworkyet.•Hehasjusthaddinner.•HaveyoueverbeentoParis?“already”和“(not)yet”•在疑问句中、否定句中“already”必须换成“yet”。•e.g.•肯定句：Hehasfinishedhishomework.•疑问句：Hashefinishedhishomework?•否定句：Hehasn’tfinishedhishomework?•或：Hehasn’tfinishedhishomework.“have/hasjust+donesth”和“didsth+justnow”---Thestudentsjust(take)theMid-termexams.---I(meet)afriendonthestreetjustnow.alreadyyetyetyet“alreadyoryet”?havemettakenA:______you______thefilmHarryPotter?B:Yes,I______.Itisveryinteresting.A:When______you______it?B:I______itsixyearsago(in2000).A:Where______you______it？B:I______itattheNanguoCinema.HaveseenhavedidseesawdidseesawPractice（操练）:现在完成时（1）1.Wealready(buy)alotofthings.2.youever(be)totheGreatWall?3.They(not,see)thefilmyet.4.Hejust(finish)hishomework.5.Inever(hear)suchawonderfulstorybefore.6.RecentlyI(read)anewbook.7.you(win)anyracesinthepastfewyears.8.Shanghai(develop)fastinthelastfewyears.9.Thestudents(learn)overtwounitssofar.haveboughthaveheardhavereadHavewonhasdevelopedhavelearntHavebeenhasfinishedhaven’tseenbuybeseefinishhearreadwindeveloplearnboughtbeenseenfinishedheardreadwondevelopedlearntsince/forsince说明动作的起始时间，它和表示过去某一时刻的词或词组连用如：sincetwoyearsago;sincehecametoChinafor说明动作延续的时间长度。它和表示一段时间的词连用。fortwoyearsIhavelivedherefortwentyyears.Myaunthasworkedtheresince1949.在过去某时候开始的并持续到现在的动作或状态。…for+一段时间;...since+过去时间点/过去时动词;Howlonghaveyou...?1.Diana(be)inShanghaiforthreedays.2.I(not,see)youforalongtime.3.I(study)Englishforsixyears.4.Greatchanges(take)placeinShanghaisince1983.5.HarryPotter(live)inaverysmallroomsincehisparentsdied.6.---Howlongyou(work)here?---Ihereforanhour.hasbeenhaven’tseenhavestudiedhavetakenhaslivedhaveworkedhaveworkedSince的用法a.since+过去一个时间点(如具体的年、月、日期、钟点、1980,lastmonth/halfpastsix)。Ihavebeenheresince1989.b.since+一段时间+agoIhavebeenheresincetwodaysago.c.since+从句Greatchangeshavetakenplacesinceyouleft.Shehaschangedalotsincewegothere.d.Itis+一段时间+since从句ItistwoyearssinceIbecameagraduate.Itis=Ithasbeena.since+过去一个时间点b.since+一段时间+agoc.since+从句d.Itis+一段时间+since从句Ihavebeenheresince1989.=Ihavebeenheresince17yearsago.=Itis17yearssinceIcamehere.=Ihavebeenherefor17years.ItistwoyearssinceIbecameagraduate.=Ihavebeenagraduatefortwoyears.=Ihavebeenagraduatesincetwoyearsago.=Ihavebeenagraduatesince2004.have/hasgoneto(Beijing)have/hasbeento(Beijing)have/hasbeenin(Beijing)•have/hasgoneto...•“（某人）正在前往（某地）的途中”或“刚刚到达某地”，•所以，他/她现在“不在说话现场”,或“还没有回来”，你在教室里寻找Bob，但Bob不在，你就问Jack：•----(You):WhereisBob,Jack?•----(Jack):Oh,hetheschoollibrary.（在途中或刚到达）（曾去过但已返回）（去了并留在那里）hasgonetohave/hasbeento...•（某人）曾经去/到过（某地），但现在已经返回(=isbacknow)说话地。•（半小时后，Bob在图书馆借好了杂志回到教室，你看到手里拿着新杂志的刚回来Bob，你问Bob：）•(You):---Whereyou,Bob?•(Bob):---Oh,Itheschoollibrary.havebeenhavebeentohave/hasbeenin(Beijing)•Linda两星期前去了北京旅游，到今天还没有回来，所以“她在北京已经呆了两周了。”，我们说：•LindaBeijingfortwoweeks.•Or:•LindaBeijingsincetwoweeksago.hasbeen/stayedinhasbeen/stayedin用been/goneto填空：1．WhereisBetty?She______________Japan.2．MissZhao_____________toBeijing.Sosheisnot