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1.PoliceinAmericahavesteppeduptheirsearchforaboywhowentmissing.2.Peoplehaveshowngreatinterestinhisdisappearanceduetosightingsofalienvisits…3.Ihaven’tseenJustinsince.4.SomepeopleinDoveralsosaythattheyhaveseenaliens.5.PeoplehavenotruledoutthepossibilitythatJustinwastakenbyaliens.6.…Peterson,whohastakenchargeofthecase.PresentperfecttenseReview:ThePresentPerfectTenseForm(结构):Summary:have/has+doneFindoutsomesentenceswhichareinthepresentperfecttenseinthetext.MrZhanghasjustboughtanewcar,buthehashadtoublewithmotorists.Whenhereturnshomeatnighthealwaysfindthatsomeonehasparkedacaroutsidehisgate.Becauseofthis,hehasnotbeenabletogethisowncarintothisgarageevenonce.Hehastowalkhomeafterheparkshiscar.“what’sthematter?Haveyouboughtacar?”“Yes,but…”MrZhanghasputupa“Noparking”signoutsidehisgate,butithasnotanyeffect.hasjustboughthashadhasparkedhasnotbeenHaveyouboughthasputup1.Theteacherintheblackjackethasleft.2.WehavestudiedEnglish.3.KungWeizhenghasalreadyfinishedthehomework.4.Hehashadhislunch.5.IhaveseenthefilmofTitanictwice.6.Moststudentshavemadegreatprogressinreading.7.MrFenghasjustreturnedfromBritain.Extension1Summary1：表示过去发生的某一动作对现在造成的影响或产生的结果.现在完成时这一时态强调是过去动作与现在的联系,也就是强调现在的影响和结果.通常与表示包括现在在内的时间副词just（刚刚）,already（已经）,before,yet（一般疑问：已经；否定句：还）never,ever等状语连用Drill11.I________(have)lunchalready.2.Hasthetrain_______(arrive),yet?3.Tome____never_______(beto)China.4.Thetwin______just_____(see)myfather.5.Thetwins____(see)myfatherjustnow.havehadarrivedhasbeentohasseensaw1.We＿＿＿＿＿＿(study)Englishforaboutfouryears.2.We＿＿＿＿＿＿(live)inHoujiMiddleSchoolsincethreemonthsago.3.Theoldman_____________（已经死了）fortwoyears.5.Justinhasbeenmissingfortwoweeks.6.Ihaven’tseenGuoYithesedays.Extension2havestudiedhavelivedhasbeendeadSummary2：强调某一动作或状态从过去某一时间开始延续到现在且有可能继续下去用延续动词。通常和for,since.sofar,bynow,untilnow,thesedays,inthelasttenyears,引导的时间状语连用。Drill21.Theprice_____recently,butIdoubtwhetheritwillremainso.Awentdown,BwillgodownChasgonedownDwasgoingdown2.Inthepastfewyearsthere____greatchangesinDaMiaotown.AisBwereChavebeenDwillbe.Timefriends1.迄今为止：sofar,uptillnow,uptonow,untilnow….2.最近的过去：inthelast/pastyears,recently,lately,thesefewdays….3.表示一段时间的短语：allday,allthisyear,allone’slife瞬间性动词如arrive,join,die,get,come,buy,sell,leave,borrow,marry等，以及终止性动词如start,begin,finish等，在现在完成时的肯定形式中不能与“for+一段时间”的时间状语连用，但可以用在否定句或这些动词对应的状态动词中。为了表述这种意思，我们常用相应的延续性动词have,keep,be..等来代替非延续性动词。Tips:Choosetherightanswers1.Ihavejoined/beeninthearmyfortenyear.2.Hehasbeento/gonetoDalianmanytimes.3.Shehasgotmarried/beenmarriedtoRobertsforayear.4.Allthepreparationsforthetaskarecompleted/havebeencompleted,andwe’rereadytostart.5.Hehasgone/beenawayfortwodays.6.Hehashad/hasboughtthisbookforayear.√√√√√√现在完成时与一般过去时的用法比较现在完成时属于现在时态范围，因此，不能和yesterday,lastnight,twoweeksago等表示过去的时间状语连用。Theplanehasarrived.（说明现在的情况：飞机在这儿）Theplanearrivedaquarterago.（动作发生在过去与现在无关）Ihavetaughthereforfifteenyears.（表示十五年前的动作一直延续到现在，还可能会继续。）Itaughthereforayear.（曾在这儿教过，但现在不在这儿任教了）ComparasionPutthefollowingsentencesintoEnglish.1.A:火车已经开走了.B:什么时候开走的?A:半个小时之前开走的.2.A:这本书我已经买了两年了.B:你在哪儿买的?A:在我老家买的.3.A:你看过这部电影吗?B:看过.A:什么时候看的.B:上周星期天看的.A:Thetrainhasleft.B:Whendiditleave.A:Itlefthalfanhourago.A:haveyouseenthefilm?B:Yes,Ihave.A:Whendidyouseeit?B:IsawitlastSunday.A:I`vehadthebookfor2years.B:Wheredidyoubuyit?A:Iboughtitinmyhometown.Correctthemistakes•Hisfatherhasdied.(for2years)•Thefootballmatchhasbegun.(since9:00a.m)•Thetwinshavejoinedthearmy.(sincetheyare18yearsold)•MyteacherhasjustleftNanjing.(for3days)Hisfatherhasbeendeadfor2years.Thefootballmatchhasbeenonsince9:00a.m.Thetwinshavebeensoldiers/beeninthearmysincetheyare18yearsold.MyteacherhasbeenawayfromNanjingfor3daysMakesomesentencesusingthepresentperfecttense.Competitiontranslation:不累啊？你已跳了三个小时啦！Aren’tyoutired？Youhavebeenjumpingforthreehours.她肯定累了，因为她一天一直在跳舞Shemustbetired,forshehasbeendancingallday.ThePresentPerfectContinuousTensePartB:Form:have/has+been+doingI_______________________(sleep)sincesveraldaysagohaven’tbeensleepingConnectionwiththepast:Connectionwiththepresent:Icouldn’tsleepseveraldaysago.Iamnotsleepingwellnow.Analysis(分析)意义：过去某时开始一直延续至今的动作，可能还要继续进行表示动作从过去某一时刻开始，一直延续到现在，现在这个动作可能刚刚终止，也可能仍然在进行着。Nowthatsheisoutofajob,Lucy______goingbacktoschool,butshehasn’tdecidedyet.A.hadconsideredB.hasbeenconsideringC.consideredD.isgoingtoconsiderReview链接高考1.Wherehaveyoubeen?We_____foryoueverywhere.A.lookB.werelookingC.havebeenlookingD.hadbeenlooked2.IwonderwhyJenny______usrecently.Weshouldhaveheardfromherbynow.A.hasn’twrittenB.doesn’twriteC.won’twriteD.hadn’twrittenGothroughtheexplanationsonpage10inourbook.Discussthedifferencesbetweenthepresentperfecttenseandthepresentperfectcontinuoustensecomparisoncomparison现在完成时现在完成进行时动作已完成动作在迄今为止的一段时间内曾经延续进行和目前还在进行强调动作的结果或影响强调动作持续进行1.Thetelephone________________(ring)forquiteawhile.Why_______anyone________(answer)it?2.They__________________(practise)thesongofwelcometoBeijingforsometimenow,buttheystill___________(notget)itrighthasbeenringinghavenotgothasnotansweredhavebeenpractising妙手填词1.自从2001年以来,中国人的饮食已经发生了很大的变化.GreatchangeshavetakenplaceinChinesediets