My father stayed there for two months.for two months划线提问答案是How long did your father stay?
问题描述：
My father stayed there for two months.for two months划线提问答案是How long did your father stay?
为什么不是 how long did your father stayed
答
前面已经有了助动词did,说明了过去式,后面的动词必须用原形.
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