Presentperfecttenseandpresentperfectcontinuoustense现在完成时与现在完成进行时1.PoliceinAmerica_____________theirsearchforaboywhowentmissing.2.Theincident__________greatinterestduetoreportsofstrangelightsintheskyandof…3.I_________Justinsince.4.SomepeopleinDoveralsosaythatthey_________aliens.5.So,whilewe______________theidea,wearelookingintootherpossibilities______6.…Peterson,who_______________thecase.PresentperfecttenseReview:havesteppeduphasreceivedhaven’tseenhavenotdismissedaswellhastakenchargeofhaveseenThePresentPerfectTensePresentPerfectTenseForm(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.havehadarrivedhasbeentohasseensawSummary2：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。1.We＿＿＿＿＿(study)Englishforaboutfouryears.2.We＿＿＿＿＿＿(live)inHoujiMiddleSchoolsincethreemonthsago.3.Theoldman_____________（已经死了）fortwoyears.5.Justin_____________fortwoweeks.6.I_________GuoYithesedays.Drill2havestudiedhavelivedhasbeendeadhaven’tseenhasbeenmissingDrill31.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:Ihavereceivedhisletterfortwomonths.XIhaven’treceivedhisletterfortwomonths.√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...
