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1、Unit1TalesoftheunexplainedPresentperfecttense&Presentperfectcontinuoustense导学案一、现在完成时1、构成have/hasdone2、用法I表示过去发生的事对现在具有影响。1)Justinhasdisappeared,soKellyisverysad.2)Theboyishappy.Hehascaughtabird.II表示过去开始的动作一直延续到现在或者还将持续下去。1)IhavenotseenJustinsinceLastFridaynight.2)DanielhaslivedinBeijing
2、sincehecametoChina.III表示动作的确切时间不明确或不重要。此时下列词汇经常和现在完成时连用:already,ever,never,for,just,lately/recently,since,yet。1)Theboyhasalreadycomehome.2)Ihaven’theardanythingfromhimyet.其中,for+一段时间,since+某个时间点。E.g.Wehaven’tseenhimfortwodays.Wehaven’tseenhimsincelastMonday.IV表示到现在为止的一段时间内重复的动作。1)Somevil
3、lagerssaythattheyhaveseenUFOsmanytimes.2)Ihaveadvisedhimtogiveupsmokingmanytimes,buthejustwon’tlistentome.V现在完成时还可用于下列句型中:This/Itisthebest/finest/mostinteresting…+that-clause,This/Itisthefirst/second…time+that-clause,that从句中的谓语动词一般用现在完成时。Itis/hasbeenaperiodoftimesince+一般过去时1)Thisisthebes
4、tbookthatIhaveread.2)ItisthefirsttimethatIhaveseenthefilm.3)Itis/hasbeenalongtimesinceIcametoWuxi.3、注意1)现在完成时不和明确的表示时间的词连用,如yesterday,lastweek,in1976等。2)表示短暂意义的动词,如begin,leave,arrive,return,stop,open,go,come,die等,不能与表示一段时间的状语连用。*ReadthefollowingsentencesandsayTorF.(1)HehascometoBeijingsi
5、ncelastyear.F(2)Hehasbeenhereforthreeyears.T(3)HehasjoinedthearmyforthreeyearsF(4)Hehasbeenasoliderfor3years.T(5)Itis3yearssincehejoinedthearmy.T(6)Hehasjoinedthearmy.T二、现在完成进行时1、构成have/hasbeendoinge.g.Ihaven’tbeensleepingwellsinceIreturnedhome.2、用法表示动作从过去开始一直延续到现在,可能刚刚停止,也可能仍然在进行。1)--So
6、rry,I’mlate.Haveyoubeenwaitinglong?--Yes.Ihavebeenwaiting(wait)foranhour.2)Sheisverytired.Shehasbeenworking(work)allmorning.3)Themanstartedworkinginthefieldhalfanhourago.Heisstillworkingnow.Themanhasbeenworking(work)inthefieldforhalfanhour.4)Theboystartedhavingdinnerfiveminutesago.Heisst
7、illhavingdinnernow.Theboyhasbeenhaving(have)dinnersincefiveminutesago.3、注意现在完成进行时多用持续性动词,如do,live,learn,lie,stay,wait,stand,study等,常和allthetime,thisweek,thismonth,allnight,allthemorning,recently等表示现在之前这一段时间的状语以及since和for引导的时间状语或从句连用。E.g.Hehasbeenwatchingtelevisionallday.I