现在完成时公开课课件.ppt

,专项复习之？,Unit14Haveyoupackedyet?,现在完成时ThePresentPerfectTense,滑县八里营乡初级中学黄利英,Studyingaims,1.现在完成时的构成2.现在完成时的主要用法及相关的时间状语3.短暂性动词与时间段的关系4.havebeen与havegone比较5.与一般过去时的用法比较,夏天还会远吗?willitstillbefarinsummer?,春天已经来了,Springhasalreadycome,现在完成时态,Springhasalreadycome.,一)构成:,have/has+动词过去分词,Thepresentperfecttense,助动词（可以帮助构成肯定、疑问和否定句）,1.Hehascleanedhisroom.(写一个一般疑问句）,Hashecleanedhisroom?,2.ShehaslivedinLondonforfouryears.(划线部分提问）,HowlonghasshelivedinLondon?,3.HehasbeentoChina,_?（写出反义疑问句部分）,hasnthe,4.Theyhavecomebackfromwork.(写否定句）,Theyhaventcomebackfromwork.,(一)表示过去发生的动作或事情对现在的影响和产生的结果.它强调的是过去的动作同现在的联系.常用的时间状语有already,yet,ever,never,just,before等.,现在完成时的主要用法,A:_yourbrother_hishomeworkyet?(finish)B:Yes,hesalreadydoneit.,Keywords,Hasfinished,yet,already,注意：already用于肯定句，yet用于疑问句和否定句中,A:_youever_tothepark?(be)B:No,never.,Keywords,Havebeen,yet,already,ever,never,注意：ever曾经用于疑问句中never从不带有否定意义,I_just_thedesk,youcantakeittoyourclassroom.(mend),Keywords,havemended,yet,ever,never,just,already,Just刚刚与现在完成时连用一般置句中Justnow刚才与一般过去时连用,(二)表示一个从过去开始,一直持续到现在,有可能继续下去的动作或状态.通常和for或since引导的时间状语连用.,Tom_inthefactorysinceheleftschooltenyearsago.(work),Keywords,hasworked,since,since后面带过去时间或有一般过去时的句子,A:Howlong_you_inthisschool?(teach)B:For6years.,Keywords,havetaught,since,for,+一段时间,We_only_100treessofar.(plant),Keywords,haveplanted,sofar,到目前为止,Keywords,yet,ever,never,since,for,just,before,already,sofar,inthepast10years,twice,也可以是其他表示次数的词,howlong,Someverbscantoftenbeusedwithfororsince,Pleasepointoutanymistakesandcorrect,Shehasboughtthecomputerfortwoyears.,had,Pleasepointoutanymistakesandcorrect,HowlonghaveyoucometotheUnitedStates？,beenin,Pleasepointoutanymistakesandcorrect,AnnhasgonetoChinasincethreemonthsago.,beenin,Pleasepointoutanymistakesandcorrect,IhaveleftShanghaifor3days.,beenawayfor3days.,Pleasepointoutanymistakesandcorrect,Ihaveborrowedthedictionarysince3daysago.,kept,Pleasepointoutanymistakesandcorrect,Thefilmhasbegunfor10minutes.,beenon,Pleasepointoutanymistakesandcorrect,Theconcerthasfinishedforhalfanhour.,beenover,Pleasepointoutanymistakesandcorrect,Hisdoghasdiedfortwoyears.,beendead,canyoudistinguish?,去过某地已经回来常与ever,never,once,twice,连用,一直留在某地与for/since连用用howlong提问,去了某地还没回来只用于第三人称,Hersister_Australia,Sheleftthismorning.,hasgoneto,canyoudistinguish?,去过常与ever,never,once,twice,连用,在与时间段连用用howlong提问,去了说话时某人不在只用于第三人称,A:Howlong_you_China?B:I_herefor3years.,havebeen,havebeenin,canyoudistinguish?,去过常与ever,never,once,twice,连用,在与时间段连用用howlong提问,去了说话时某人不在只用于第三人称,A:_youever_thecity?B:No,never.,Havebeento,与一般过去时的用法比较,现在完成时和一般过去时都是说过去的事情，但现在完成时注意的不是事情本身,而是强调事情与现在保持的某种密切联系（如现在的结果，影响,一直延续到现在等）;而一般过去时，则只讲述发生在过去的动作和事情与现在没有关系。,上一页,下一页,主菜单,Thepasttenseorthepresentperfecttense,know,haveknown,knew,Thepasttenseorthepresentperfecttense,saw,have,lost,Thepasttenseorthepresentperfecttense,did,hasfinished,see,saw,用动词的适当形式填空,1.-_you_yourpen?(mend)-Yes,I_.-When_you_it?-I_ityesterday.2.-Howdoyoulikethefilm?-I_(notsee)suchamovingfilmbefore.3.Milliessister_(join)theclublastweek.Soshe_(be)intheclubfornearlyoneweek.,Have,mended,have,did,mend,mended,haventseen,joined,hasbeen,Exercises,4.Myfather_(give)up_(smoke).Hedoesnt_(smoke)now.5.TheGreenfamily_(notcome)backyetfromthecinema.They_(go)toseeafilmonehourago.,hasgiven,smoking,smoke,haventcome,went,6.ShehasknownSam_nineyears.(for,never,since)7.Theyhave_arrived.(ever,just,yet)8.Haveyou_riddenahorse?(ever,for,yet)9.ShehasknownFred_they