问题描述：
一道英语选择题困扰着我两个月,求你们了!
Why ( )come and join us?
A.do B.not C.does D.doesn't
这道题开始我选的D,可正确答案却显示为B,解析为:固定句式Why not do…?意思为:为什么不…,我看了之后也明白,如果用助动词,必须有主语,如:Why doesn't he come and join us?但是我有疑惑:如果用Why not do…句式来做句子,如果有主语怎么办,若可以有主语,应该怎么用?
Why ( )come and join us?
A.do B.not C.does D.doesn't
这道题开始我选的D,可正确答案却显示为B,解析为:固定句式Why not do…?意思为:为什么不…,我看了之后也明白,如果用助动词,必须有主语,如:Why doesn't he come and join us?但是我有疑惑:如果用Why not do…句式来做句子,如果有主语怎么办,若可以有主语,应该怎么用?
问题解答：
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