| He's already been back from work. (改为一般疑问句) he been back from work ? |
| He's already finished his work. (改为否定句) He finished his work . |
| 一 Has Tony watched the TV show?(作肯定回答) — Yes, . |
| 一 Have your friends left yet?(作否定回答) — No, . |
| He studied hard so that he could pass the exam. (改为同义句) He studied hard pass the exam. |