完成時實用課件

1、完成時態(tài)的用法1）現(xiàn)在完成時態(tài)表示 過去發(fā)生的動作對現(xiàn)在造成的影響或結(jié)果 。 Our teacher has left . We have studied English . I have already finished the homework . He has had his lunch . He has become a doctor .Have / has + 過去分詞1. 構(gòu)成2. 意義2）某個動作從過去已經(jīng)開始， 一直持續(xù)到現(xiàn)在, 還有可能持續(xù)到將來，動作的 持續(xù)性要通過一段時間來表示。一段時間的表達方法有 兩 種:For : + 一段時間 for a year for two

2、weeks for three yearsSince ：過去的某一時刻, since nine since last week 一般過去時態(tài)的時間狀語從句, since you came. since you got home. ! :for 和since 所引導(dǎo)的時間狀語都表示一段時間. 對劃線部分提問都用 How long .1） He has been away since last week .2）He has been away for one week .對下列劃線部分進行提問。練一練 ：結(jié)束性動詞不能和表示一段時間的時間狀語連用,但是他可以轉(zhuǎn)換成相應(yīng)的延續(xù)性動詞.1. 直接用 延

3、續(xù)性動詞 buy catch(get) a cold borrow Come/go /become put on 2. 轉(zhuǎn)換成 be+名詞 join the army Join the Party go to school Have have a coldkeep bewearbe a soldierbe a Party memberbe a student3. 轉(zhuǎn)換成 be + 形容詞或副詞 die finish begin leave be away fall sleep be asleep close be closed4. 轉(zhuǎn)換成 be + 介詞短語 go to school be i

4、n school join the army be in the armybe deadbe overbe on1.我們買這本書三年了.We have had the book for three years .2.他感冒三天了. He has had a cold for three days.We bought the book three years ago . He caught a cold three days ago.一般過去時態(tài)和現(xiàn)在完成時態(tài)可以構(gòu)成 同意句3.自從上星期我借的這本書 I have kept the book since last week.4.我成為一個學(xué)生兩

5、年多了. I have been a student for over two years. I borrowed the book last week.I became a student two years ago.5.Mr Black死了三年了。Mr Black has been dead for three years.Mr Black died three years ago.6.小名參軍半年了。Xiao Ming has been a soldier for half a year.Xiao Ming joined the army half a year ago.7.我們上了8年

6、學(xué)了。We have been students for eight years.8.下課10分鐘了。 The class has been over for ten minutes.9.電影開始了一小時了。 The film has been on for an hour.注：含延續(xù)性動詞的現(xiàn)在完成時的同義句 轉(zhuǎn)換 。She began to work ten years ago.She has worked since ten years ago.It is ten years since she began to work.Ten years has passed since she b

7、egan to work. She has worked for ten years.Exercises1.Youve never seen such a wonderful film before, _?A havent you B have you C do you D dont you2. -Ann has gone to Shanghai. -So _ her parents. A has B do C did D have3. I have watched the game. -When _ you _ it?A have watched B do watch C did watch

8、 D will watchB D C4. Mr. Green _ in China since five years ago. A lived B has lived C lives D is going to live5. His grandma _ for two years. A died B has been dead C was dead D has died6. Where is Han Mei now? - She _ to Shanghai. She will be back in two days. A has gone B has been C goes D had gone7. -_ to the United States ? - No, never,but I went to Canada a few years ago.8. You havent changed your mind,_? A do you B a