英语 过去完成时 句子1.I didn't know who_____(break) the window .2.He asked if the girl_____(find) her lost bike .可用过去完成时吗?为什么?

问题描述:

英语 过去完成时 句子
1.I didn't know who_____(break) the window .
2.He asked if the girl_____(find) her lost bike .
可用过去完成时吗?为什么?