作品介绍：
现在完成时代
构成：
1.肯定句：have（has）＋过去分词。
2.否定句：haven’t（hasn’t）＋过去分词。
3.疑问句：把助动词have或has提到主语之前。
回答用yes,…have（has）./
no,…haven’t（hasn’t）.
连用时间状语：already,yet,ever,never,
just,befｏｒe等。
“仍然，还”用在疑问句和否定句..[ 查看全部]
现在完成时代
构成：
1.肯定句：have（has）＋过去分词。
2. 否定句：haven’t（hasn’t）＋过去分词。
3. 疑问句：把助动词have或has提到主语之前。
回答用yes, …have（has）. /
no, …haven’t（hasn’t）.
连用时间状语：already, yet, ever, never,
just, befｏｒe 等。
“仍然，还 ” 用在疑问句和否定句中，放在句末。
i haven’t read this book yet .
have you had breakfast yet ?
“从来不” 用在否定句中,放在句中。
is he famous ?i have never heard of him .
“以前”用在完成时中，放在句末。
i have never read this kind of books befｏｒe.
exercise
根据所给情况，用just,already或yet造句。
1.after lunch you go to see a friend at her house.she says‘would you ｌｉｋｅ something to eat?’ you say: no, thank you. _______________（ have lunch ）
2.joe goes out. five minutes later,the phone rings ａｎｄ the caller says ‘can i speak to joe?’ you say: i’m afraid _________________.（ go out ）
3.you are eating in a restaurant this evening. the waiter thinks you have finished ａｎｄ starts to take your plate away.you say: wait a moment !_______________________
（ not / finish ）
4.you are going to a restaurant this evening.
you phone to reserve（预定）a table. later your friend says ‘shall i phone to reserve a table? ’you say: no,__________________ it （do）
1. i am a doctｏｒ. i began to wｏｒk when i was 22.now , i am 26. i ________ fｏｒ four years.
2. we went to the usa last monday. today is monday . we _________ （stay） in the usa since last monday.
b级真题
since ａｎｄ fｏｒ
一、用fｏｒ和since填空。
______three hours
______three o’clock
______two days
______yesterday afternoon
______i came here
______last sunday
1.they’ve known each other since_______.
a.1995 b. three years
2.i’ve been interested in chinese fｏｒ______.
a. last year b. one year
3. she has been a doctｏｒ fｏｒ______.
a. two years b.two years ago
4. i’ve had a headache since_______.
a. i got up this mｏｒning b. five hours
6. my parents have owned this house fｏｒ______.
a. a long time b. many years ago
7. they’ve been in love since______.
a. last spring b. three months
8. we have known each other since_____.
a. one year b. last year
9. --how long have you been ｌｉｋｅ this?
--since______. a.last night b. two days
10.--how long has she wｏｒked here?
--she has wｏｒked here fｏｒ_____.
a. 1993 b. six years
不规则动词的过去式以及过去分词 巧记规律
aaa: put– put –put let—let –let
aba: become—became—become
abb: stａｎｄ—stood—stood
ａｂｃ: eat— ate—eaten
aaa
cost-cost-cost read-read-read
put-put-put cut-cut-cut
let-let-let set-set-set
beat-beat-beat hit-hit-hit
hurt-hurt-hurt spit-spit-spit
rid-rid-rid
一、原形、过去式和过去分词的词形和读音都相同的单词，结尾字母一般是t或d。
特殊：动词read的过去式和过去分词虽然词形与原形一致，read-read-read，但发音分别是[ri:d]-[red]-[red]。
总结现在完成时：
1、构成：have / has +过去分词。
2、概念：
（1）表示过去或已经完成的某一动作对现在 成的影响或结果。常与下列状语连用:already, just, yet, ever, never, befｏｒe
（2）表示过去已经发生，持续到现在的动作或状态，可以和表示从过去某一时刻延续到现在（包括“现在”在内）的一段时间的状语连用。
a.fｏｒ和表示一段时间的词组连用。
如：fｏｒ 3 years
b.since和表示过去某一时刻的词或词组连用。
如：since 1997, since two years ago,since last week
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