7. If only he have lain quietly as the doctor instructed, he would not suffer so much now.

_________

8. Yesterday I went to see him, only learn that he had gone abroad two days before.

_________

9. We are swimming in the lake when the storm started.

_________

答案: 1. significant→significantly

2. anyhow→somehow

3.在I后添加am

4. back→ahead

5. arresting→arrested

6. date→dates

7. have→had

8.在only后加to

9. are→were