牛津译林版英语必修二Unit1Grammarandusage2教案

牛津高中英语教课方案单元：Unit1Talesoftheunexplained板块：GrammarTeachingaims:Learnthedifferencesbetweenthepresentperfecttenseandthepresentperfectcontinuoustense.Teachingimportantpoints:Learnhowtoformandusethepresentperfecttense.Understandwhenthepresentperfectcontinuoustenseisusedinsentences.Teachingmethods:Explainingandpracticing.Teachingaids:themulti-media.Teachingprocedures:Step1ComparethetwotensesWeusethepresentperfecttensetotalkaboutanactioncompletedintherecentpast,andthepresentperfectcontinuoustenseforanactionthatstartedinthepastandisstillhappening.此刻达成时和此刻达成进行时都表示动作从过去开始，但此刻达成时可表示事件或动作刚结束，而此刻达成进行时则重申换作仍在连续。LiJiahasreadabookaboutStonehenge.

（表示她已经读完了。

)LiJiahasbeenreadingabookaboutStonehenge.(表示她仍在读。)Wecanusethepresentperfecttenseforrepeatedactions,andthepresentperfectcontinuoustensefornon-stopactions.Weusuallyusethepresentperfecttensetoaskquestionsbeginningwithhowmany/much,andthepresentperfectcontinuoustensetoaskquestionsbeginningwithhowlong.此刻达成时可表示频频发生的动作，发问时用

howmany/howmuch

。而此刻达成进行时则表示连续的、不中断的动作，发问时用

howlong。—HowmanytimeshaveyouvisitedEgyptthismonth?—IhavevisitedEgypttwicethismonth.—HowlonghaveyoubeentouringEgypt?—IhavebeentouringEgyptfortwomonths.Wecanuseeitherastateverboranactionverbwiththepresentperfecttensebutweusuallycanonlyuseanactionverbwiththepresentperfectcontinuoustense.此刻达成时能够用表示状态的动词或表示动作的动词做谓语。而此刻达成进行时则只好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.Weusethepresentperfecttense,notthepresentperfectcontinuoustense,withthewordslikenever,yet,alreadyandever.此刻达成时的句子中能够用像never、yet、already和ever这样的词，而此刻达成进行时的句子中则不能够用这样的词。Exercise:IhavenevervisitedAmerica.IhavealreadybeentoAmerica.IhaveneverbeenvisitingAmericaStep2Practice1.PartA:Readtheconversationandcircletherightwordstocompleteit.Answers:(1)heard(2)beendoing(3)beenresearching(4)beendoing(5)started(6)done(7)read(8)found(9)started(10)beendoing(11)beenmakingTrytoanswerthefollowingquestionsaccordingtothecomicstrip.(1)Wheredoyouthinktheboyhasbeenwaiting?(Hehasbeenwaitingatanunder-groundstation.)(2)Whathavethealiensbeentravelingin?Whatdoesitlooklike?(TheyhavebeentravelinginanUFO.Itlookslikeasaucer.)(3)Whoelsehavethealienstalkedto?(Theyprobablyhavetalkedtoanimalsorplantsontheearthaswellascreaturesonotherplants.)(4)Whatotherplanetshavethealiensvisited?(Theyh