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1、过去分词的构成,上一页,下一页,AAA,主菜单,ABB,ABC,ABC,present(now),future,past,do my homework,The present perfect tense,现在完成时,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?
2、,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.,1.过去某一时间点发生的动作对现在产生影响。,功能：,2.过去某一时间点发生的动作持续 到现在或还将持续下去。,What are the key words for the Present Perfect Tense?,A:_ your brother _ his homework yet?(finish)B:Yes,he s already done i
3、t.,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
4、,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,Tom _ in the factory since he left school ten years ago.(work),Key words,has worked,yet,ever,never,since,already,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,yet,ever,never,since,for,already,+一段时间,We
5、 _ only _ 100 trees so far.(answer),Key words,have planted,yet,ever,never,since,for,just,already,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,since:(自以来)1)since+时间点Hehasstayedheresince5oclock.2)since+时间段+agoHehasstayedher
6、esince5hoursago.3)since+从句ShehastaughtEnglishsincehecamehere.for:(长达）for+时间段He has kept the book for 2 weeks.,since,for 的用法:,Take notes,用for 或since填空,Mr.Brown has had his TV _ 15 years.Ive taken driving lessons _ last month.My sister has had her cell phone _ a month.My friends havent visited me _ my
7、 birthday.We havent used our car _ a long time.She hasnt had a good cup of coffee _ years.Tom has worn glasses _ he was 7 years old.,for,since,for,since,for,for,since,实义动词分为:1)瞬间动词 2)延续动词,瞬间动词,注意:瞬间动词不能和时间段连用.,Some verbs cant often be used with for or since,Please point out any mistakes and correct,
8、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,My brother has joine
9、d the army for five years.,been in,been a soldier,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 be
10、gun 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
11、回来不与只用于第三人称,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:Where is Bob?B:He _ Japan with his sister.,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
12、,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,Sam got sick two days ago.,Sam has been sick for two days.,Sherry got her drivers license(执
13、照)in 1999.,Sherry has had her drivers license since(自从)1999.,Arnold started to play tennis in Jan.,Arnold has played tennis since Jan.,Maggie moved to Hawaii in 1996.,Maggie has lived in Hawaii for about 8 years.,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,have,did,move,lived,The past tense or the present perfect tense,did,has finished,see,saw,
