关于英语中的when和while?
这里有8句话,哪些是对的?
1、WhenIwasplaying,hewasdoinghishomework.
2、WhileIwasplaying,hewasdoinghishomework.
3、WhenIplayed,hewasdoinghishomework.
4、WhileIplayed,hewasdoinghishomework.
5、WhenIwasplaying,hedidhishomework.
6、WhileIwasplaying,hedidhishomework.
7、WhenIplayed,hedidhishomework.
8、WhileIplayed,hedidhishomework.
帮我判断,
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