Why is the grammatical structure of "What keeps him going?" right? I got a bit confused over this, when I realized that this structure fundamentally contradicts the basic rule I teach my students: ...
Interrogative sentences without auxiliary verbs and declarative sentences with auxiliary verbs [duplicate]
Possible Duplicate: Is it OK to add a question mark to show inflection? Sometimes, auxiliary verbs or helping verbs are not present in some interrogative sentences in some specific contexts ...
Possible Duplicate: Why is there no form of “do” in questions of the type “who knows?” I want to know which is the correct way to ask this question: Who wrote ...