现在完成时公开课 ppt课件.ppt
,专项复习之？,Unit14 Have you packed yet?,现在完成时 The Present Perfect Tense,滑县八里营乡初级中学 黄利英,Studying aims,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.have been 与have gone 比较 5.与一般过去时的用法比较,夏天还会远吗?will it still be far in summer?,春天已经来了,Spring has already come,现在完成时态,Springhas already come.,一)构成:,have/has+动词过去分词,The present perfect tense,助动词（可以帮助构成肯定、疑问和否定句）,1.He has cleaned his room.(写一个一般疑问句）,Has he cleaned his room?,2.She has lived in London for four years.(划线部分提问）,How long has she lived in London?,3.He has been to China,_ _?（写出反义疑问句部分）,hasnt he,4.They have come back from work.(写否定句）,They havent come back from work.,(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:_ your brother _ his homework yet?(finish)B:Yes,he s already done it.,Key words,Has finished,yet,already,注意：already 用于肯定句，yet 用于疑问句和否定句中,A:_ you ever _ to the park?(be)B:No,never.,Key words,Have been,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 _ the desk,you can take it to your classroom.(mend),Key words,have mended,yet,ever,never,just,already,Just 刚刚 与现在完成时连用 一般置句中Just now 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 _ in the factory since he left school ten years ago.(work),Key words,has worked,since,since 后面带过去时间或有一般过去时的句子,A:How long _ you _ in this school?(teach)B:For 6 years.,Key words,have taught,since,for,+一段时间,We _ only _ 100 trees so far.(plant),Key words,have planted,so far,到目前为止,Key words,yet,ever,never,since,for,just,before,already,so far,in the past 10 years,twice,也可以是其他表示次数的词,how long,Some verbs cant often be used with for or since,Please point out any mistakes and correct,She has bought the computer for two years.,had,Please point out any mistakes and correct,How long have you come to the United States？,been in,Please point out any mistakes and correct,Ann has gone to China since three months ago.,been in,Please point out any mistakes and correct,I have left Shanghai for 3 days.,been away for 3 days.,Please point out any mistakes and correct,I have borrowed the dictionary since 3 days ago.,kept,Please point out any mistakes and correct,The film has begun for 10 minutes.,been on,Please point out any mistakes and correct,The concert has finished for half an hour.,been over,Please point out any mistakes and correct,His dog has died for two years.,been dead,can you distinguish?,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how long 提问,去了某地还没回来只用于第三人称,Her sister _ Australia,She left this morning.,has gone to,can you distinguish?,去过常与ever,never,once,twice,连用,在与时间段连用用how long 提问,去了说话时某人不在只用于第三人称,A:How long _ you _ China?B:I _ here for 3 years.,have been,have been in,can you distinguish?,去过常与ever,never,once,twice,连用,在与时间段连用用how long 提问,去了说话时某人不在只用于第三人称,A:_ you ever _ the city?B:No,never.,Have been to,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,The past tense or the present perfect tense,know,have known,knew,The past tense or the present perfect tense,saw,have,lost,The past tense or the present perfect tense,did,has finished,see,saw,用动词的适当形式填空,1.-_ you _your pen?(mend)-Yes,I _.-When_ you _ it?-I _ it yesterday.2.-How do you like the film?-I _(not see)such a moving film before.3.Millies sister _(join)the club last week.So she _(be)in the club for nearly one week.,Have,mended,have,did,mend,mended,havent seen,joined,has been,Exercises,4.My father_(give)up _(smoke).He doesnt _(smoke)now.5.The Green family_(not come)back yet from the cinema.They_(go)to see a film one hour ago.,has given,smoking,smoke,havent come,went,6.She has known Sam_ nine years.(for,never,since)7.They have_arrived.(ever,just,yet)8.Have you_ ridden a horse?(ever,for,yet)9.She has known Fred_ they were at primary school.(already,just,since)10.We have not completed the project_.(already,for,yet),for,just,ever,since,yet,Write a passage about travel to use the present perfect tense.,Homework,
