Unit 1 Tales of the unexplained Grammar and usage 教学设计2

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1、Unit1TalesoftheunexplainedGrammarandusage教学设计2单元：Unit1Talesoftheunexplained板块：GrammarTeachingaims:Learnthedifferencesbetweenthepresentperfecttenseandthepresentperfectcontinuoustense.Teachingimportantpoints:1.Learnhowtoformandusethepresentperfecttense.2.Unders

2、tandwhenthepresentperfectcontinuoustenseisusedinsentences.Teachingmethods:Explainingandpracticing.Teachingaids:Themulti-media.Teachingprocedures:Step1Comparethetwotenses1.Weusethepresentperfecttensetotalkaboutanactioncompletedintherecentpast,andthepresentperf

3、ectcontinuoustenseforanactionthatstartedinthepastandisstillhappening.现在完成时和现在完成进行时都表示动作从过去开始,但现在完成时可表示事件或动作刚结束,而现在完成进行时则强调动作仍在继续。LiJiahasreadabookaboutStonehenge.(表示她已经读完了。)LiJiahasbeenreadingabookaboutStonehenge.(表示她仍在读。)2.Wecanusethepresentperfecttenseforre

4、peatedactions,andthepresentperfectcontinuoustensefornon-stopactions.Weusuallyusethepresentperfecttensetoaskquestionsbeginningwithhowmany/much,andthepresentperfectcontinuoustensetoaskquestionsbeginningwithhowlong.现在完成时可表示反复发生的动作,提问时用howmany/howmuch。而现在完成进行时则表示

5、持续的、不间断的动作,提问时用howlong。—HowmanytimeshaveyouvisitedEgyptthismonth?—IhavevisitedEgypttwicethismonth.—HowlonghaveyoubeentouringEgypt?—IhavebeentouringEgyptfortwomonths.3.Wecanuseeitherastateverboranactionverbwiththepresentperfecttensebutweusuallycanonlyuseanacti

6、onverbwiththepresentperfectcontinuoustense.现在完成时可以用表示状态的动词或表示动作的动词做谓语。而现在完成进行时则只能用表示动作的动词做谓语。Ihavehadthiscameraforfiveyears.(had是表示“拥有”状态的动词)IhavetakenphotosofUFOswiththiscamera.(taken是表示动作的动词)IhavebeentakingphotosofUFOswiththiscamera.(taking是表示动作的动词)4.Weuset

7、hepresentperfecttense,notthepresentperfectcontinuoustense,withthewordslikenever,yet,alreadyandever.现在完成时的句子中可以用像never、yet、already和ever这样的词,而现在完成进行时的句子中则不可以用这样的词。Exercise:(T)IhavenevervisitedAmerica.(T)IhavealreadybeentoAmerica.(F)IhaveneverbeenvisitingAmerica

8、Step2Practice1.PartA:Readtheconversationandcircletherightwordstocompleteit.Answers:(1)heard(2)beendoing(3)beenresearching(4)beendoing(5)started(6)done(7)read(8)found(9)started(10)beendoin