关于英语中的when和while?
这里有8句话,哪些是对的?
1、When I was playing,he was doing his homework.
2、While I was playing,he was doing his homework.
3、When I played,he was doing his homework.
4、While I played,he was doing his homework.
5、When I was playing,he did his homework.
6、While I was playing,he did his homework.
7、When I played,he did his homework.
8、While I played,he did his homework.
帮我判断,