画线部分提问,he read a book when it raining

问题描述:

画线部分提问,he read a book when it raining
画线滴是read a book

这个句子确实有错误.句子可能是 :He was reading a book when it was raining.
那么提问的方式是:What was he doing when it was raining?
如果原句是:He read a book when it's raining.
那么提问的方式是:What did he do when it's raining?当然,这里的it's 是it was的省略方式