bedoingwhen用法总结

　　be doing when：

　　表示“正在做某事，就在这时……”

　　(1)I was watching the football match when he came in.

　　当他走进来的时候我正在看足球赛。

　　(2)He asked me what I would be doing when he came the next day.

　　他问我当他第二天来的时候我会在干什么。