高中英语 Unit1 Tales of the unexplained Grammar and usage教案 牛津译林版必修2.doc

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1、Unit1TalesoftheunexplainedPeriod5GrammarandUsagePresentperfecttense&presentperfectcontinuoustenseTeachingaims:1.HelpSslearnhowtoformandusethepresentperfecttense2.HelpSslearnhowtoformandusethepresentperfectcontinuoustenseTeachingmethods:1.Reading2.PracticeTeachingprocedures:Stepone:Le

2、ad-in1.MakeSstolookatthefollowingsentencesandpointoutwhattenseortensesareusedinthemandthereasonwhytheyareused.1)WehavestudiedEnglishforaboutfiveyears.Webegantostudyitfiveyearsago.2)Theymovedtothesouthin1990andhavelivedtheresincethen.3)Thestudentisdoingherhomework.Shehasn’tfinishedity

3、et.4)Ericlefthomelastyearandhasjustcomeback.Takesentenceoneasanexample:ThetimewebegantostudyEnglishwasatadefinitetimeinthepast,soweusethepastsimpletense.Buttheactionstudyhappensagainandagain,soweusethepresentperfecttense.TellSs:Whenanactionhappensoveraperiodoftimethatbeganinthepastan

4、dcontinuestothepresent,thepresentperfecttenseisoftenused.Steptwo:ReadingAskSstoreadpoint1—6onpage8andexplainthereasonswhytheyareusedinthesesentences.ThenaskSstoreadpoint1—3onpage9.TellSsthatweusepresentperfectcontinuoustensetotalkaboutactionsthatstartedinthepastandarestillcontinuing,

5、orhavejustfinishedbutarestillconnectedtothepresentinsomeway.Examples:I’vebeenwaitingforanhourandhestillhasn’tturnedup.I’msosorryIamlate.Haveyoubeenwaitinglong?Stepthree:DifferencebetweenPresentperfectorpresentperfectcontinuousAskSstoreadpoint1-4onpage10andknowthedifferencebetweenthem

6、.Stepfour:Practicea)AskSstofinishdoingpartA&Bonpage11.b)AskSstofinishPartConpage88.