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1、现在完成时延续性动词的用法,现在完成时的构成形式,have done has,助动词,过去分词,瞬间性动词例如come,go,leave等，不和表示延续性的时间状语连用，例如for two hours或者是since last month。如果我们想用它们来表达延续性的状态，就要把他们转化成对应的延续性动词。,延续性动词和瞬间性动词之间的转化,1.He died 10 years ago. - He for 10 years / since 10 years ago.2. He borrowed the book 2 weeks ago. - He has kept the book for
2、2 weeks.,has been dead,for +时间段以及since+时间点要用延续性动词，die要延续为be dead,for +时间段以及since+时间点要用延续性动词， borrow要延续为 keep-kept -kept,3. He bought the motorbike a month ago. (ago 表过去buy变 bought) -He the motorbike for a month.,has had,for +时间段要用延续性动词， buy要延续为 have-had-had,4. He arrived here three days ago. - He he
3、re since three days ago.,has been,for +时间段以及since+时间点要用延续性动词， arrive要延续为 be的过去分词是been,5. They turned off the light 2 hours ago. - The light for 2 hours.6. He left here 2 years ago. - He from here for 2 years.,has been on,has been away,leave-left-left延续为be away/be away from +place,7. The film began 3
4、0 minutes ago. - The filmfor 30 minutes.,has been on,has been open,8. They opened the door an hour ago. - The doorfor an hour.,begin 延续为be on,open延续为be open,9. They closed the door an hour ago. - The door for an hour.,has been closed,close 延续为be close,10. He joined the army last year. - He has been
5、a soldier for a year. - He has been in the army for a year. - It is a year since he joined the army.,1.I like Guilin. I _ there twice. A. go B. went C. have gone D. have been 此题中的twice（两次）表示经历过，去过Have/has been要用现在完成时，因此选D。 2. Where”s Li Lei? He _ Beijing. A. goes to B. went to C. has gone to D. has
6、been to,此题的语境是李雷不在说话的地方，因此要选 C。Have/has gone去了,3. He went to Toronto two years ago, so he _ Toronto for two tears. A.has been to B. has gone to C. has been in D. has gone,题目有for two years这一个段时间，而have been to 和have gone to都不能和段时间连用，因此选C has been in +地点+for+时段,现在完成时与一般过去时的比较,1）一般过去时表示过去某时发生的动作或单纯叙述过去的
7、事情，强调动作；现在完成时为过去发生的，强调过去的事情对现在的影响，强调的是影响。,I saw this film yesterday.（强调看的动作发生过了。）I have seen this film. （强调对现在的影响，电影的内容已经知道了。）,2）一般过去时 常与具体的表示过去的时间状语连用;,一般过去时的时间状语: yesterday, last week，ago, in1990, in October, just now, - 具体的时间状语现在完成时的时间状语: for, since, so far, ever, never, just, yet, till/until, up
8、 to now, in the past few years, recently, -模糊的时间状语,句子中如有过去时的时间副词（如 yesterday, last, week, in 1960）时，不能使用现在完成时，要用过去时 （错）Tom has written a letter to his parents last night. （对）Tom wrote a letter to his parents last night.,2）一般过去时 常与具体的表示过去的时间状语连用;,一般过去时的时间状语: yesterday, last week，ago, in1990, in Octob
9、er, just now, 现在完成时的时间状语: for, since, so far, ever, never, just, yet, till/until, up to now, in the past few years, recently, -模糊的时间状语,（错）Tom has written a letter to his parents last night. （对）Tom wrote a letter to his parents last night.,3）现在完成时可表示持续到现在的动作或状态，动词一般是延续性的，如live, teach, learn, work, st
10、udy, know. 一般过去时常用的非持续性动词有come, go, leave, start, die, finish, become, get married等。,She joined the League three years ago. (加入的动作不是延续的)She has been in the League for three years (since three years ago). (在团内的状态可延续)She has been a League member for three years (since three years ago).(是团员的状态可持续),一、选择
11、填空 ( )1.Jims been to the Great wall before ,_he?(A)isnt(B)wasnt(C)hasnt (D)doesnt( )2.Shes never been to England, _she?(A)has (B)hasnt(C)isnt (D)is( )3._has Hanmei been in the library.(A)How long (B)How soon(C)How far (D)How often,C,A,A,( )4.Mr Green isnt in the office , He _to the library(A)has gon
12、e (B)went (C)has been (D)will go,( )5.Mr smith _to Tokyo and he will be back in a week(A)has been (B)has visited (C)has sent (D)has gone,A,D,( )6.They_China for two years (A)have been to(B)have been in(c)have gone to(D)have come to,B,句型转换1. He has never surfed, _(改成反意疑问句）? 2. They have been here sin
13、ce 2000 . (对划线部分提问) _ have they been here?,has he,How long,die,3. The old man _last year. He_ for a year.(die),died,has been dead,4. This factory opened twenty years ago.(改写句子，句意不变)This factory _ for twenty years.hour.,5. Miss Gao left an hour ago. （同上） Miss Gao_ an hour ago,has been open,has been away since,Its +time since +过去式,6.The Green Family moved to France two years ago. （同上） _ two years_ the Green family moved to France.,Its,since,7. The bus has arrived here. It arrived ten minutes ago. （同上）_ ten minutes _ the bus arrived here,Its,since,
