完成，对现在造成的影响，可能持续发生下拍闭仿去。它的构成是：主语◆助动词(have/has)◆动词的过去分词（have/has done）。

The experiment has been donesuccessfully. 这个实验做得很成功。

现在完成时的被动语态的否定式为：have/ has ◆not ◆been ◆done。如：

Tom's novel has not been published.汤姆的小说还没有被出版。

1. He has turned off the light. 他已把灯关了.

2. Have you found your pen yet?你已找到你的钢笔了吗?

3. He has lived here since 1978.自从1978年以来,他一直住在这儿.

4. I have been in the army for more than 5 years.小编在部队已经呆了五年多了.

5. I have heard nothing from him up to now.到目前为止小编没有他的任何消息.

been in the League for three years.= It is three years since he joined the League. 他入团已三年了.

7. The train has arrived. 火车到了.

8. Have you joined the computer group? 你加入电脑小组了吗?

9. Jill has bought a new computer.吉尔买了一台新电脑.

10. I have just turned off the light. 小编刚刚把灯关上.

11. She has lost her bike. 她把自行车丢了.

12. We have had much snow this winter. 今年冬天多雪.

13. She has taught in the school for ten years. 她在这所学校教书已经旅橡10年了.

14. I haven't eaten anything since breakfast. 小编从早饭起就斗册一直没有吃东西.

15. He has done a lot of work in the past two years. 在过去两年中他做了许多工作.

16. I have learned about two hundred English words this morning. 本月小编拆销旁学了大约200个英语单词.

17. I have been to the Great Wall twice. 小编曾经去过长城两次.

18. She hasn't left home for a year. 她离开家还不到一年.

19. I haven't seen Jamie for two months. 小编两个月没见杰米了.

ld man hasn't returned to his hometown for about fifty years. 这位老人约有50年没有回家乡了.

I have already made a big start in his direction.在他的方向小编数渣运已经有了一个大的开薯梁始。

They haven't started yet．他们还没有动身

Have you ever sung this English song?你曾唱过这首英文歌吗?

He has just had his meal．他刚吃过饭。

The train has left before I arrive at the station．在小编到达车梁桐站之前火车已开走了

there. 小编从来没去那里。 5. I’ve already been there twice. 小编只去棚陪过那里两次。 6. Who has been to Hawaii? None of us has. 谁去过夏威夷?没人去过。 7. Has anybody water-skied before? 有人之前滑过水吗? 8. How long have you been here in Sydney? 你来悉尼多久了? 9. I know you’ve come to see your father. 小编知道你来看你的爸爸。 10. You’ve learnt surfing from him, haven’t you? 你从他那里学的滑水，不是吗?

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