Mark had finished his homework. His mother then let him go out to play.（用
once改写句子
）
, his mother let him go out to play.
once改写句子
）
, his mother let him go out to play.
举一反三
- Tom didn’t go out to play until he had finished doing his homework. Not until ____.
- John finished his homework. Then, he went out to play. (after)
- It is ____today,let's go out to play.
- _____you have finished your homework, you can go out and play.
- _______ money, his parents couldn't let him go to school.