tales of unexplained grammar and usage教案

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1、●    GrammarandUsagePresentperfecttense1.Usedifferentmethodstopresentthepresentperfecttense.Herearesomeideas:1)Pleaselookatthescreen.Payattentiontothedifferentformsoftheverbs:  2)Let’scompletethefollowingsentences,inwhichthepredicatepartismissing.   We_____(study)Englishforaboutfiveyears. 

2、      They_____(live)inthesouthsincetheirdaughterwasborn.       I_______(read)yourarticlethreetimes.It'swellwritten.        Thestudent________(finish)herhomeworkalready.         Eric__________(go)backtohishometowntoday.          Answers:havestudied   havelived   haveread   hasfinished   ha

3、sgone3)Readthefollowingsentencesandpointoutwhattenseortensesareusedinthemandthereasonswhytheyareused.   WehavestudiedEnglishforaboutfiveyears.Webegantostudyitfiveyearsago.   Theymovedtothesouthin1990andhavelivedtheresincethen.Thestudentisdoingherhomework.Shehasn'tfinishedityet.Ericlefthome

4、lastyearandhasjustcomeback.2.Wemaywonderwhysomeverbscan'tbeusedinthepresentperfecttense.Let’sreadthefollowingsentences,andtrytofinddifferentusagesofsomeverbs.Justinhasbeenawayfromhomeforseveraldays.HedisappearedlastFriday.Theyboughtthishousethreeyearsagoandtheyhavelivedheresincethen.Mybrot

5、herwenttoseemygrandpalastweek.Hehasvisitedhimthreetimesthismonth.Soyouseewhenanactionhappensoveraperiodoftimethatbeganinthepastandcontinuestothepresent,thepresentperfecttenseisoftenused.Whenanactionhappenedatadefinitetimeinthepast,thepastsimpletenseisoftenused.3.ReadPoints1and2onpage8tomak

6、esurewhythepresentperfecttenseisusedinthesetwosentences.              4.GooverPoint3onpage8tolearnwhattimeexpressionscanbeusedwiththepresentperfecttense.Payattentiontothedifferentusagesbetweenalreadyandyet,orforandsince.5.ReadPoint4onpage8tolearnthatthepresentperfecttensecanbeusedinasituat

7、ionwheretheactionwascompletedonlyamomentago.Inthiscase,justisused.6.GooverPoints5and6onpage8andnotethatwhenwewanttoexpressarepeatedaction,weusethepresentperfecttensewiththetimeexpressionsonce/twice/threetimes...7.Let’sreadthediaryentryandthencompleteitusingthe