高中英语Unit 3 Period 4 Grammar and usageVIP免费

Unit3Period4GrammarandusageTheGeneralIdeaofThisPeriod:ThemaintaskofthisperiodistolearnandmasterThePastPerfectTense.MakedifferencesbetweenthePastPerfectTense,theSimplePastTenseandPresentPerfectTense.Finishsomeexercisesaboutdifferentkindsofverbtenses.TeachingAims:1.MastertheusageofThePastPerfectTense.2.MakedifferencesbetweenthePastPerfectTense,theSimplePastTensethePresentPerfectTense3.PracticeaboutallkindsofverbtensesTeachingImportant&DifficultPoint:Howtousethepastperfecttensescorrectly.LearnthedifferencebetweenthepastperfecttenseandthepresentperfecttenseTeachingMethods:l.Explanationandpractice.2.Explainsomeimportantanddifficultpointstostudents.3.Finishsomeimportantexercisesaboutverbtenses.TeachingAids:1.themultimedia2.theblackboardTeachingProcedures:Step1greetingsGreetthestudentsasusualCheckthehomeworkStep2lead-inWritesomesentencesontheblackboardandleadthestudentstoThenshowsomesentencesandleadthestudentstorecognizesituationswherethepastperfecttenseisusedaswellaswhattimeexpressionscanbeusedtogetherwiththetense.Also,theywillseehowthetenseisformedandknowthedifferencebetweenthepastperfecttenseandthesimplepasttense.T:LookatthesentencesontheBb.Whatcanyoufindthecommonpointsofthesesentencesare?(Showthefollowingontheblackboard)◆Uponenteringthetomb,Carter'sluckypetbird,whichhadledhimtotheplace,waseatenbyasnake.◆"Weemptiedthetombofeverythingitcontained,''saidCarter.Cartersaidthattheyhademptiedthetombofeverythingitcontained.S:Theyallincludethepastperfecttense.T:Good!Weformthepastperfecttensebyusing"had"andthe"verb-ed"form.Iwillshowyouwhyandwhenweusethepastperfecttense.PleaselookatthesentencesontheBb.Wecanseefromthefirstsentence:Carter'sluckypetbirdledCartertothesite,andthenitwaseatenbyasnake.Weusethesimplepasttensetotalkaboutapastaction.Whenwewanttotalkaboutsomethingthathappenedatanearliertimeinthepast,weusethepastperfecttense.Wecanfindmoreexamples.Suchas,Theticketshadbeensoldoutwhenwearrivedatthetheatre.Itmeanstheticketsweresoldoutbeforewearrivedatthetheatre.Doyouknowwhyweusethepastperfecttenseinthesecondexample?S:Ithinkit'sbecausewe'vechangethesentencefromthedirectspeechintothereportedspeech.And"said”isusedinthemainclause,sowemustchangethesimplepasttensetothepastperfecttense.用心爱心专心116号编辑T:Quiteright!Wecanusethepastperfecttenseinreportedspeechtorefertoanactionthathadalreadyhappenedatthetimeofspeaking.Wecanchangethesimplepasttenseandpresentperfecttenseinthedirectspeechtothepastperfecttenseinthereportedspeech.Nowreadthefollowingtwoexamples.1.IhaddonemyhomeworkthismorningbeforeIwenttothemuseum.2.ThenafewmonthsafterCarterhadopenedthetomb,LordCarnarvonfellillwithafeveranddied.T:Aswecanseeinthefirstexample,theuseofthepastperfecttensesimplyindicatesthatanactioncomesbeforeanotherpastaction.Itdoesnotmeanthatthepastactionhappenedalongtimeago.Andweoftenusethepastperfecttensewithtimeexpressionssuchaswhen,after,before,assoonas,until,since,by,forandalready.(Showmoresentencesandaskthemtojointhepairsofsentencesusingthepastperfecttensesothatstudentscanunderstandthepastperfecttensebetter.)T:Lookatthesesentences.Jointhesepairsofsentencesusingthepastperfecttense.Youcanaddwordsifneeded.1.Ienjoyedtheplayverymuch.Isawitoncebefore.2.Ilookedformyfriendsattheendoftheplay.Theyleft.3.Wegottotherestaurant.Itclosed.Suggestedanswers:1.Ienjoyedtheplayverymuch,althoughIhadseenitoncebefore.2.Ilookedform...