Unit6NurturingnatureUsinglanguageGrammar课件高中英语选择性

Unit6NurturingnaturePresentperfectcontinuousB4U6WhendidyoubegintolearnEnglish?HowlonghaveyoubeenlearningEnglish?Think:What’sthedifferencebetweenthetwoquestions?Presentperfectcontinuous基本结构现在完成进行时have/has

＋

been

＋

v­ing与现在完成时的区别？aWildanimalssuchastheseTibetanantelopeshavenowbeenusingthesepassagesforyears.b

...beforeIknowit,wehavereachedTanggulaStation.Lookatthesentencesfromthereadingpassageandanswerthequestions.1Whichofthesestatementsaretrueaboutsentence(a)?(1)

Wildanimalsstartedusingthesepassagesinthepast.(2)Wildanimalsusedthesepassagesonlyonce.(3)Wildanimalsstillusethesepassagesnow.aWildanimalssuchastheseTibetanantelopeshavenowbeenusingthesepassagesforyears.b

...beforeIknowit,wehavereachedTanggulaStation.Lookatthesentencesfromthereadingpassageandanswerthequestions.2Whatisthedifferencebetweentheexpressionsinboldinsentences(a)and(b)?Theyaredifferentinformandmeaning.ForSentence(a)theformis“havebeendoing”,whilefor(b)is“havedone”.Inmeaning,theboldpartSentence(a)meanstheactioniscontinuousfromthepast;whiletheactionhappenedonceinthepast.Nowlookformoresentenceswiththepresentperfectcontinuousinthereadingpassage.Allthistime,thesong“SkyRailway”hasbeenplayinginsidemyhead.Thejourneyhasbeenflyingby,...TheQing-TibetPlateauhasbeenattractingpeople’sadmirationforcenturies.现在完成进行时的状语往往和

since+时间点,for+时间段等表述一段时间的时间状语连用；与lately,recently,thesedays,till/until,uptonow,sofar

等表示到目前为止的时间状语连用。Ihavebeenlivingheresince1988.Ihavebeenwaiting

fortwohours.Sheisverytired.Shehasbeenworking

allmorning.基本用法表示动作从过去某时开始，一直延续到现在，将来还可能延续下去，强调动作的延续性。Ihavebeenwaitingforanhour,butshehasn’tcomeyet.我都等了一个小时了，但是她还没来。（可能还会继续等）ButIhavebeenwritingallmylife.我一生都在坚持写作。(动作还将继续下去)基本用法表示从过去某时开始到现在这一段时间内动作一再重复发生。ShehasbeenphoningJimeverynightforthepasttwoweeks.两星期以来，她每天晚上都给吉姆打电话。Youhavebeentellingmenottobelatealltheway.一路上你一直在告诉我不要迟到。基本用法表示动作刚刚结束，该动作一般不再继续，有时会指出结果。Ihavebeenplayingping­pongallmorning,soI'msweating.整个上午我一直在打乒乓球，所以我浑身是汗。I'vebeenpaintingthedoor,somyhandsareverydirty.我一直在给门刷油漆，所以我的手很脏。基本用法表示某种感情色彩。Youhavebeendaydreamingbutnevermakeaneffort.你一直在做白日梦，但从不努力。(指责)Youhavebeenlyingtome.你一直在对我说谎。(气愤)不能用现在完成进行时的情况有些动词不能用于现在完成进行时，但可用于现在完成时状态动词：be,have,exist情感动词：like,love,have感觉动词：see,hear,know,feel,sound短暂性动词：finish,marry,getup,come,go等Ihaveknownhimforyears.Theyhavefinishedthework.havebeenhearinghasbeenmakingismovinghavebeenflyinghavebeengivenhavebeenusingCompletethepassagewiththecorrectformoftheverbinbrackets.Lookatthechartsandmakesentencesusingthepresentperfectcontinuoustense.Thenumberoftreeshasbeenincreasinginthelast20years.Desertareashavebeenreducinginthelast20years.Butterflypopulationhasbeenincreasing/hasbecominglargerandlargerinthelast20years.practice!翻译练习：使用现在完成进行时1.这些年来,他们一直为我们杂志写稿。2.从下午四点钟到现在,她一直在写信。3.我们一直在这所学校学习了三年。4.你看了多久电视了?HowlonghaveyoubeenwatchingTV?Wehave