| Tim didn't go to China. (用never和before改写句子) Tim to China before. |
| They have planted some trees on the mountain so far. （改为否定句） They trees on the mountain so far. |
| Daming has learned how to look after himself. (改为一般疑问句) Daming how to look after himself? |
| Amy began to live in China five years ago. (改为同义句) Amy in China five years. |
| Have your parents ever visited the Great Wall? (作肯定、否定回答) , they . / , they . |
