1. It has been raining in the past three weeks.过去三周一直在下雨。(完成时间状语)

　　2. He was writing a book last year, but I don’t know whether he has finished it.

　　他去年在写一本书，我不知道他写完了没。

　　3. The plane is arriving in 5 minutes. 飞机将于5分钟之后到达。(进行时表将来)

　　4. I had meant to come here, but I was too busy then.(过去完成时)

　　我本来打算来这儿的，但是当时太忙了。

　　5. If he comes today , I won’t go. 今天如果他会来，我将不走。(主从句时态)

　　6. He studied in Shanghai for 3 years, and then he has lived in Beijing till now/ since then/ever since

　　他在上海读了三年书。然后就一直住在北京。(过去时，完成时)

　　7. I will have written 200 poems by the end of next term.

　　到下学期末为止，我将写完200首诗。(将来完成时)

　　8. He is afraid of being laughed at. 他害怕人嘲笑。 (被动中的介词不省略)

　　9. The workers get paid by the month. 这些工人按月发工资。(get表被动)

　　10. His theory proved (to be ) true. 他的理论被证实是对的。(系动词)

　　11. This book sells well and is worth reading. Besides, it is easy to understand.

　　这本书好卖，而且值得一读，另外，这本书读起来易懂。

　　12. The Great Wall is worth reading. (=It is worthwhile to visit the Great Wall ).

　　长城值得参观。