题目内容：

英语各种问句.
一般：He speaks Chinese.Does he speak Chinese?
过去：She went to school yesterday.Did she go to school yesterday?
现在完成：He has lived here since 1949.Has he lived here since 1949?
为什么一般、过去的疑问句中动词都改原型,而现在完成时的疑问句中动词不改?

优质解答

这是规定,记住了,就可以了