1 He didn't reach the village before eight last night .
2.Didn't he reach the village before 8 last night? Yes, he did. / No, he didn't.
3. They had collected more than 1000 stamps by the end of last month,.
4. My watch has been accurate after it was repaired.
5. Mr Li asked if we had finished our homework.
6. I knew Hao Zelin 9 years ago.
7. Wang Heming had known his english teacher before he enter the school.
8. As students, we should get to school on time.
9. I forgot to turn off the lights yesterday.
10. Pei Yang is so friendly that everybody likes him.
11. Thousands of people come here to do exercises.
12. The students had stopped talking when Miss Li came in.
13. He has been out of work for two years.
14. I have been here since 1999.
15. Don't be late for the meeting.
16. Tom has been late for class twice.
17. Luckily, my friend Tony and his father was droving past me, and they gave me a lift.
18. I happened to reach the classroom.