以when开头的问句有哪些呢!
问题描述：
以when开头的问句有哪些呢!
答
When do you + 动词原形?
When did you + 动词原形?
when will you + 动词原形?
when have you + 过去分词?
When are you + 现在分词?
when were you + 现在分词?
when had you + 过去分词?
...