英语：必修2-unit1-tales-of-the-unexplained-grammar课件译林牛津版

1.PresentPerfectTense,2.PresentPerfectContinuousTense,M2U1Grammaryet:用于否定和疑问句,Daniel_(live)inBeijingsincehecametoChina.,haslived,came,现在完成时表示过去已经开始，持续到现在,也许还会持续下去的动作或状态。可以和表示从过去某一时刻延续到现在（包括现在在内）的一段时间的状语连用。如：for和since，sofar,uptonow,today,until/till,thisweek(month,year)during/over/inthepastfewyears(weeks,months),现在完成时用法2-未完成用法,小结：,Fillintheblanks:.a.ShehaslearntEnglish3years.b.ShehaslearntEnglish3yearsago.c.Theyhavelivedhere_1990.,for,since,since,I(see)hersofar.What_(happen)totheUSAinthepast35years?,haventseen,hashappened,Since的补充用法A.主句+since+从句Greatchangeshavetakenplacesinceyouleft.B.Itis+时间段+since+从句Itis/hasbeentwoyearssinceIleftmyhometown.b.Itwas/hadbeentwoyearssinceIhadleftmyhometown.c.ItisyearssinceIsmoked.d.ItisyearssinceIbegantosmoke.,IwenttoEgyptin1986.IwenttoEgyptin2004.I_(be)toEgypttwice.,havebeen,现在完成时可过去发生过一次或多次的情况，也可以说是一种经历。,现在完成时用法3-经验性用法,I（notsee）anythingsobeautifulinmylife.,haventseen,小结：,()1.Hehascomehere.()2.Hehascomeherefor3days.()3.Hehasntcomeherefor3days.()4.Hehasstayedherefor3days.()5.Hehasbeenawayfor3days.,现在完成时知识扩展一,与现在完成时有关的句型:1)This(That/It)isthefirst(second)time+that-clauseThisisthefirsttimethatI_(see)pandas2)This(That/It)istheonlytime+that-clauseItistheonlytimethatI_(travel)abroad.3)This(That/It)isthebest/finest/mostinteresting+that-clause.ItisthemostdeliciousfoodthatI_(taste),haveseen,havetraveled,havetasted,现在完成时知识扩展二,PresentPerfectContinuousTense,Unit1Grammar&usage,Theboystartedhavingdinnerfiveminutesago.Heisstillhavingdinnernow.Theboy_(have)dinnersincefiveminutesago.,hasbeenhaving,1.现在完成进行时,Themanstartedworkinginthefieldhalfanhourago.Heisstillworkingnow.Theman_(work)inthefieldforhalfanhour.,hasbeenworking,现在完成进行时的构成：have/hasbeendoing,现在完成进行时用法1现在完成进行时表示过去的动作持续到现在并有可能持续下去.,CCTVhasbeenbroadcastingEnglishprogramssince1984.,broadcasted,broadcast,broadcast,小结：,现在完成进行时用法2:现在完成进行时表示过去的动作持续到说话时刚结束。,Mavisstartedwaiting.,Kellyarrives.,Kelly:SorryImlate.Haveyoubeenwaitinglong?Mavis:Yes.Ivebeenwaitingforanhour.,wait,小结：,3.现在完成时和现在完成进行时的比较,Tom_(read)abookaboutStonehenge.(Shefinishedreadingthebook.)Tom_(read)abookaboutStonehenge.(Sheisstillreadingthebook.),hasread,hasbeenreading,比较一：,did,did,1.,2.,I_(travel)toBeijingthreetimes.I_(travel)inBeijingfor3days.,havetravelled,比较二：,havebeentravelling,_haveyoubeenswimminginthelake?_haveyouswuminthelake?,A.Howlong,B.Howmanytimes,比较三：,A,B,1.Shehashadthepenfor2years.2.Shehaswrittenmanycompositionswiththispen.3.Shehasbeenwritingcompositionswiththispen.,stateverb,actionverb,actionverb,比较四：,()1.IhavenevervisitedAmerica.()2.Ihavealread