1. She does housework at the weekends. (改为否定句)
2. Mike runs as fast as Ben. (改为一般疑问句)
3. I get up at six thirty every day. (用yesterday afternoon替代every day)
4. Nancy is good at English and Maths. (对画线部分提问)
5. Mike runs fast. I run faster. (两句合并为一句)
6. The policeman caught the thief. (改为一般疑问句，作否定回答)
7. My sister is thirty kilos. (对画线部分提问)
8. Turn right at the third crossing. (改为否定句)
9. How can I get to the supermarket? (改为同义句)
10. The camera is very nice. (改为感叹句)
11. Are they American cars? (改为单数)
12. Go along this street. (改为否定句)
13. Give the purse to me. (换一种说法，句意不变)
14. The policeman caught the thief. (改问正在进行时)
15. I get to the shopping centre by bus. (对画线部分提问)
16. It always rains in summer there. (改为一般疑问句，作肯定回答)
17. It’s cold in winter there. (对画线部分提问)
18. I like autumn best. (改为否定句)
19. Do you like spring? (加上winter 改为选择疑问句)
20. Su Yang is asking Ben some questions. (对画线部分提问)
21. Please turn off the light. (改为否定句)
22. I know his telephone number. (改为一般疑问句)
23. It is a fine day today. (改为感叹句)
24. The children have school today. (改为否定句)
25. I’d like to join them.(改为一般疑问句)
26. They are going to see a film tomorrow. (对画线部分提问)
27. I like collecting stamps and singing. (改为否定句)
28. He often cleans his bedroom. (改为一般疑问句)
29. My mother is watering flowers in the garden. (对画线部分提问)
30. David and Mike are going to planting trees this afternoon.(对画线部分提问)
