what were you doing 是过去进行时态。询问“你在干什么？”
回答例句I was reading story book.我刚刚在看故事书。
what were you doing和What you were doing的用法和区别
what were you doing是疑问句,后加问号,问某个过去的时段正在做什么。
What you were doing是陈述句，一般作宾语。
广电宽带助手
水利万物而不争,
而万物莫能与之争。
