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1、GrammarandusagePresentperfecttense&PresentperfectcontinuoustensePoliceinAmericahavesteppeduptheirsearchforaboywhowentmissing.2.Peoplehaveshowngreatinterestinhisdisappearanceduetosightingsofalienvisits…3.Ihaven’tseenJustinsince.4.SomepeopleinDoveralsosaythattheyhaveseenaliens.5.Peoplehavenotrul
2、edoutthepossibilitythatJustinwastakenbyaliens.6.…Peterson,whohastakenchargeofthecase.PresentperfecttenseReview:ThePresentPerfectTenseForm(结构):Summary:have/has+doneFindoutsomesentenceswhichareinthepresentperfecttenseinthetext.MrZhanghasjustboughtanewcar,buthehashadtoublewithmotorists.Whenheretu
3、rnshomeatnighthealwaysfindthatsomeonehasparkedacaroutsidehisgate.Becauseofthis,hehasnotbeenabletogethisowncarintothisgarageevenonce.Hehastowalkhomeafterheparkshiscar.“what’sthematter?Haveyouboughtacar?”“Yes,but…”MrZhanghasputupa“Noparking”signoutsidehisgate,butithasnotanyeffect.hasjustboughtha
4、shadhasparkedhasnotbeenHaveyouboughthasputup1.Theteacherintheblackjackethasleft.2.WehavestudiedEnglish.3.KungWeizhenghasalreadyfinishedthehomework.4.Hehashadhislunch.5.IhaveseenthefilmofTitanictwice.6.Moststudentshavemadegreatprogressinreading.7.MrFenghasjustreturnedfromBritain.Extension1Summa
5、ry1：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.Thetwin
6、s____(see)myfatherjustnow.havehadarrivedhasbeentohasseensaw1.We＿＿＿＿＿＿(study)Englishforaboutfouryears.2.We＿＿＿＿＿＿(live)inLifaSeniorSchoolsincethreemonthsago.3.Theoldman_____________（已经死了）fortwoyears.5.Justinhasbeenmissingfortwoweeks.6.Ihaven’tseenGuoYithesedays.Extension2havestudiedhavelivedhasb
7、eendeadSummary2：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.A.wentdownB.willgodownC.hasgonedownD.wasgoingdown2
