They have left. --他们已经离开了,也就是说现在他们人不在这里
I have had my lunch. --我已经吃过午饭了,也就是说我现在不饿 也可表示持续到现在的动作或状态，或有可能有可能停止，或有可能继续延续下去。。 He has learned English since 2001. -从2001年开始学的,现在还在继续学着呢
现在完成时的构成形式： have /has (助动词)+done(过去分词)
I/You/They/We have talked . He/She has talked.
I/You/They/We haven’t(have not) talked . He/She hasn’t(has not) talked.
Have I/You/They/We talked . Has he/she talked.
肯定的简略回答是：Yes，主语＋have/has.，否定的简略回答是：No，主语＋have/has not.。 如： I have seen the film. →Have you seen the film？
Yes， I have./No， I haven’t.
1. “过去的经历”：动作发生在过去的某一时刻且已经结束，但未说明动作发生的具体时间或情景，强调该经历(即动作发生后)对现在所造成的影响或产生的结果。如： I have heard of the man. 我听说过这个人。
? I have lived in Shanghai since I was ten years old. 我从十岁起就住在上海。
②说明“到说话时为止，已完成了多少”。即句中，含有表示“完成了多少”的宾语或表示动作发生次数的状语。如：I have read the book three times. 这本书我看了三遍。
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。）
一般过去时的时间状语: yesterday, last week，…ago, in1990, in October, just now,from..on, -- 具体的过去时间状语
现在完成时的时间状语: for, since, so far, ever, never, just, yet, till/until,
up 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，
（错）Tom has written a letter to his parents last night.
（对）Tom wrote a letter to his parents last night.
teach, learn, work, study, know.
一般过去时常用的非持续性动词有come, go, leave, start, die, finish, become,
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)
He has finished the work. 他已完成了那项工作。 (表结果)
I’ve known him since then. 我从那时起就认识他了。(表经历)
? He joined the Party three years ago. 他入党三年了。(他三年前入党的)
2. 用“It is/has been＋时间段＋since…”句型。如：It is/has been three years since I bought the book. 这本书我买了三年了。(从买这本书起到现在已三年了)
He has been in the Greener China for three years.----
He has been a member of the Greener China fot three years.他加入“绿色中国”已经三年了。 The old man died 4 years ago. ----The old man has been dead for 4 years.
He joined the Party 2 years ago. -----He has been in the Party for 2 years.
I bought the book 5 days ago. ---- I have had the book for 5 days.
延续性动词表示能够延续的动作,如：learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。延续性动词可以与表示时间段的状语连用。
for+一段时间:for 2 years; since从句,since he came here;
since+时间点名词,since last year, since 5 days ago;
how long; for a long time等。
非延续性动词也称终止性动词、瞬间动词,表示不能延续的动作,这种动作发生后立即结束。 如:open, die, close, begin, finish, come, go, move, borrow, lend, buy等。
非延续性动词在肯定句中与表示时间点的状语连用，如：two years ago; at 5 o'clock;
例:He died 5 years ago.
leave --- be away borrow --- keep buy --- have
begin/start --- be on die --- be dead finish --- be over
open sth --- keep sth open fall ill --- be ill get up---be up
catch a cold --- have a cold come here --- be here go there --- be there
become --- be come back --- be back fall asleep --- be asleep
get to/ arrive/reach --- be (in) leave --- be away from get to know --- know
go (get) out →be out put on→ wear
since 用来说明动作起始时间— “自从……”
I have lived here for more than twenty years.
I have lived here since I was born.
My aunt has worked in a company since 1949.
I have not heard from my uncle for a long time.
I worked here for more than twenty years. (我现在已不在这里工作。)
I have worked here for many years. (现在我仍在这里工作。)
比较 have/has been to have/has gone to have/has been in
He went to Shanghai last week 上周他[做了一件事:那就是]去了上海
He has been to Shanghai. 他(曾经)到/去过上海 [在他人生中曾经有过这样的经历,但他人现在肯定不是在上海而是回来了]
He has gone to Shanghai. 他已经去上海了 [也许刚动身出发,也许已经到了,也许还在路上,反正他人不在这里]
He has been in Shanghai for 10 years. 他呆在上海迄今为止已经10年了 [现在还在上海没有离开呢]
He lived in Shanghai for 10 years. 以前他在上海住过10年 [现在不在上海了]
1.He died 10 years ago. --- He ____ ____ ____ for 10 years / since 10 years ago.
2. He borrowed the book 2 weeks ago. --- He ____ ____ the book for 2 weeks.
3. He bought the motorbike a month ago. ---He ____ ____ the motorbike for a month.
4. He arrived here three days ago. --- He ____ ____ here since three days ago.
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.
7. The film began 30 minutes ago. --- The film ____ ____ ____ for 30 minutes.
8. They opened the door an hour ago. --- The door ____ ____ ____ for an hour.
9. They closed the door an hour ago. --- The door ____ ____ ____ for an hour.
10. He joined the army last year. --- He ____ ____ a ____ for a year.
--- He ____ ____ ____ the army for a year.
--- It ____ a year ____ he joined the army.
1、Both his parents look sad . Maybe they ______what's happened to him .（呼和浩特）Ａ. knew Ｂ. have known Ｃ. must know Ｄ.will know
2、He has ___ been to Shanghai , has he ?Ａ. alreadyＢ.never Ｃ.ever Ｄ. still
3、Have you met Mr Li ____？Ａ. justＢ. agoＣ.before Ｄ. a moment ago
4、The famous writer _____ one new book in the past two year .
Ａ. is writing Ｂ.was writing Ｃ.wrote Ｄ.has written
5、—Our country ____ a lot so far . —Yes . I hope it will be even ______ .
Ａ. has changed ; wellＢ. changed ; goodＣ. has changed ; better Ｄ. changed ; better
6、Zhao Lan ______already ______in this school for two years .
Ａ. was ; studying Ｂ. will ; study Ｃ. has ; studiedＤ. are ; studying
7、We ______ Xiao Li since she was a little girl .
Ａ. know Ｂ. had known Ｃ. have known Ｄ. knew
8、Harry Potter is a very nice film .I_______ it twice .
Ａ. will see Ｂ. have seen Ｃ. saw Ｄ.see
9、—These farmers have been to the United States .
—Really ? When _____ there ?
Ａ. will they goＢ. did they go Ｃ. do they go Ｄ. have they gone
10、—______ you ___ your homework yet ?—Yes . I _____ it a moment ago .
Ａ.Did ; do ; finished Ｂ.Have ; done ; finishedＣ.Have ; done ; have finishedＤ.will ; do ; finish
11、 His father ______ the Party since 1978 .
Ａ. joined Ｂ. has joined Ｃ. was in Ｄ. has been in
12、—Do you know him well ? — Sure .We ______ friends since ten years ago .
Ａ. were Ｂ. have been Ｃ. have become Ｄ. have made
13、—How long have you ____ here ? —About two months .
Ａ. been Ｂ. gone Ｃ. come Ｄ. arrived
14、Hurry up! The play __________ for ten minutes .
Ａ. has begun Ｂ. had begun Ｃ. has been on Ｄ. began
15、 It ___ ten years since he left the army .Ａ. isＢ. hasＣ. willＤ. was
16、 Miss Green isn't in the office . she_______ to the library .
Ａ.has gone Ｂ. went Ｃ.will go Ｄ. has been
17、My parents ______ Shandong for ten years .
Ａ. have been inＢ. have been to Ｃ. have gone toＤ. have been
18、The students have cleaned the classroom, ____?
A. so they B. don’t they C. have they D. haven’t they
19、 to China?
A. How soon, comes B. How often, got C. How long, came D. How far, arrived
20、 for more than 9 years.
A. has come here B. has started to work C. has lived there D. has left the university
1、He has never surfed, ____________ ?（改成反意疑问句）
2、提问) _______________________ have they been here?
3、The old man _________ last year. He ____________for a year. (die) （动词填空）
4、This factory opened twenty years ago.(同义句转换)
This factory ____________________ for twenty years.
5、Miss Gao left an hour ago. (同义句转换)
Miss Gao ________ _______ ________ ________ an hour ago.
6、Her mother has been a Party member for three years .（同义句）
Her mother _______ the Party three years ________ .
7、The Green Family moved to France two years ago. (同义句转换)
_______ two years ________ the Green family moved to France.
8、The bus has arrived here. It arrived ten minutes ago. (把两个句子合并成一个句子)