新概念一 L83-L86 現(xiàn)在完成時專項練習

1、新概念一 L83-L86 現(xiàn)在完成時專項練習一 現(xiàn)在完成時的定義（一） 現(xiàn)在完成時表示過去發(fā)生或者已經(jīng)完成的動作對現(xiàn)在造成的影響或結(jié)果。常與 just, already, yet, ever, never, before, recently 等連用，強調(diào)動作的完成，不強調(diào)動作的持續(xù)。 例句：I have already had breakfast.（二） 表示過去已經(jīng)開始持續(xù)到現(xiàn)在的動作或狀態(tài)，可以和表示“ 從過去某一點時間延續(xù)到現(xiàn)在的一段時間狀語”連用。如：for + 時間段， since + 時間點/一段時間+ ago/ 一般過去時的從句，in the past/ last few yea

2、rs, so far, up to now, how long 等，表示持續(xù)動作或者狀態(tài)的動詞必須是延續(xù)性動詞。 例句：I have had this book for 2 years.(對) I have bought this book for 2 years.(錯)二 構(gòu)成1. 肯定句：主語 + have/ has + 過去分詞 + 其他.例句： I have finished my homework.2. 否定句：主語 + have/ has + not + 過去分詞 + 其他.例句： I havent finished my homework.3. 一般疑問句：Have/ Has +

3、主語 +過去分詞 + 其他？ Yes, 主語 + have/ has. /No, 主語 + havent/ hasnt. 例句：Have you finished your homework? Yes, I have./ No, I havent.4. 特殊疑問句：疑問詞 + have/ has +主語 +過去分詞 + 其他？例句：When have you already finished your homework? I have already finished it since 5 o clock.三 規(guī)則動詞過去分詞的變化規(guī)律（和過去式的變化一樣）1. 一般情況加 ed 2. 以 e

4、 結(jié)尾的，加-d 3. 以輔音字母加 y 結(jié)尾的，變y 為 i 加-ed4. 以一個輔音字母結(jié)尾的重度閉音節(jié)單詞，雙寫末尾輔音字母加-ed四. already 和 yet 在現(xiàn)在完成時的用法1. already , 意為“已經(jīng)”，通常用于現(xiàn)在完成時的肯定句中，放在助動詞 have/ has 后，過去分詞前或者句尾。 例句：They ve already read this book for an hour.2. yet, 意為 “已經(jīng)，還”，用于否定句中或者疑問句中，放在句末。還可以用于現(xiàn)在完成時態(tài)的縮略回答。 例句： Have you visited your friends? No, no

5、t yet.五. have/ has been to sp 和 have/ has gone to sp 的區(qū)別與用法1. have/ has been to sp 表示“曾經(jīng)到過某地”，是一種經(jīng)歷，含有現(xiàn)在已經(jīng)離開那里之意，側(cè)重于經(jīng)歷。后面可接次數(shù)（如 once, twice, three times 等），表示“去過某地幾次”，也可和 ever, never 等常連用. 例句： Have you ever been to Paris? Yes, I have.2. have/has gone to sp ，意為“到某地去了”不知道是否已到，但是該人不在說話現(xiàn)場，所以主語常是第三人稱。 例句

6、：Where is Mrs. Smith? She has gone to Germany.語法專練1. You that question three times. A. already asked B. have already asked C. already have asked D. asked already2. -Would you like some more food? - Thank you. I enough.A. will have B. have had C. have D. had3. He his homework and he is now listening

7、to music. A. finished B. has finished C.finish D. is finishing4. - you your homework yet? - Yes, I it just now.A. Did, do, finished B. Have, done, finished C. Have, done, have finished D. Will, do, finish5. - How do you like Beijing, Mr. Black? - Oh, I such a beautiful city. A. dont visit B. didnt v

8、isit C. havent visited D. wont visit6. - Id like to introduce my best friend to you , Peter. - Thank you, Lucy. But we already.A. meet B. met C. Will meet D. have met7. - Jack, lets go to see the movie Harry Potter. - Oh, I it many times. So I dont want to see it.A. have seen B. see C. will see D. s

9、aw8. I a camera two weeks ago but I havent have a chance to use it. A. have bought B. bought C. will buy D. buy9. - Are you surprised at the ending of the movie? - No, because I the story.A. read B. will read C. have read D. was reading10. - Have you finished writing the book report ？ - No, not .A.

10、already, already B. already, yet C. yet, yet D. yet, already.11. He the space museum three times, so he wont go there with us. A. went B. has gone to C. has been to D. has been in12. She has been to the Great Wall, has she? A. already B. never C. ever D. just13. - Hello, can I speak to Alice now? - Sorry, she isnt here. She to the shop.A.