高一英语精品教案：Unit1Talesoftheunexplained-grammarandusage（牛津译林版必修2）Presentperfecttense1.Usedifferentmethodstopresentthepresentperfecttense.Herearesomeideas:1)Pleaselookatthescreen.Payattentiontothedifferentformsoftheverbs:2)Let’scompletethefollowingsentences,inwhichthepredicatepartismissing.We_____(study)Englishforaboutfiveyears.They_____(live)inthesouthsincetheirdaughterwasborn.I_______(read)yourarticlethreetimes.It'swellwritten.Thestudent________(finish)herhomeworkalready.Eric__________(go)backtohishometowntoday.Answers:havestudiedhavelivedhavereadhasfinishedhasgone3)Readthefollowingsentencesandpointoutwhattenseortensesareusedinthemandthereasonswhytheyareused.WehavestudiedEnglishforaboutfiveyears.Webegantostudyitfiveyearsago.Theymovedtothesouthin1990andhavelivedtheresincethen.Thestudentisdoingherhomework.Shehasn'tfinishedityet.Ericlefthomelastyearandhasjustcomeback.2.Wemaywonderwhysomeverbscan'tbeusedinthepresentperfecttense.Let’sreadthefollowingsentences,andtrytofinddifferentusagesofsomeverbs.Justinhasbeenawayfromhomeforseveraldays.HedisappearedlastFriday.Theyboughtthishousethreeyearsagoandtheyhavelivedheresincethen.Mybrotherwenttoseemygrandpalastweek.Hehasvisitedhimthreetimesthismonth.Soyouseewhenanactionhappensoveraperiodoftimethatbeganinthepastandcontinuestothepresent,thepresentperfecttenseisoftenused.Whenanactionhappenedatadefinitetimeinthepast,thepastsimpletenseisoftenused.3.ReadPoints1and2onpage8tomakesurewhythepresentperfecttenseisusedinthesetwosentences.4.GooverPoint3onpage8tolearnwhattimeexpressionscanbeusedwiththepresentperfecttense.Payattentiontothedifferentusagesbetweenalreadyandyet,orforandsince.5.ReadPoint4onpage8tolearnthatthepresentperfecttensecanbeusedinasituationwheretheactionwascompletedonlyamomentago.Inthiscase,justisused.6.GooverPoints5and6onpage8andnotethatwhenwewanttoexpressarepeatedaction,weusethepresentperfecttensewiththetimeexpressionsonce/twice/threetimes...7.Let’sreadthediaryentryandthencompleteitusingthecorrectformsoftheverbsinbrackets.Answers:(2)saw(3)hasvisited(4)loves(5)hasn'tvisited(6)hasswum(7)hasnevermet(8)hasdived(9)hasfound(10)hasn'tfound(11)Has,beenSummaryofThePresentPerfecttense:1.Weusethepresentperfecttensetotalkaboutthingsthathappenedintherecentpast,butareconnectedtothepresent.Danielhaslived(live)inBeijingsincehecametoChina.(Connectionwiththepast:DanielcametoChina.Connectionwiththepresent:DanielislivinginChina.)2.Weusethepresentperfecttensetotalkaboutsomethingthatstartedinthepast,andisstillhappeningnow.camehaslived________________________________________pastnowfuture3.Weusethepresentperfecttensetotalkaboutactionsthatwerecompletedonlyashorttimeago.IwenttoEgyptin1986.IwenttoEgyptin2004.Ihavebeen(be)toEgypttwice.4.Wecanalsousethepresentperfecttenseforrepeatedactions.Hasiteversnowed(snow)inHongKong?No,ithasneversnowed(snow)there.5.Weusethepresentperfecttensewhentheexacttimeofanactionisnotclearorimportant.Weuseitwithtimeexpressionssuchas:already,ever,for,just,lately,never,recently,since,yetNotes:1.Weusealreadyforaffirmativestatementsandyetfornegativestatementsandinterrogativesentences.2.Weusefor+aperiodoftimeandsince+apointoftime.3.Structuresconnectedwiththepresentperfecttense:1)Itis(hasbeen)+aperiodoftime+since-clause.2)This(That/It)isthefirst(second…)time+that-clause(presentperfecttense).3)This(That/It)istheonly)...
