Hi, I do not know the context from which you took this question, but I will provide you the general idea. The structure of this question is commonly used, and many times it asks a general or rhetorical question, which suggests that there is no necessity for someone to do something. Questions of that ilk often take the bare infinitive, which is the most basic form of the verb.
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guzhao67"But why say more?"? is the expression an abbreviated one?I would say so. In my own mind I hear "should I" or "should you", thus: