Which is more correct to say in a question? (For example a guy that wakes up in a train)
"Where am I?"
"Where I am?"
This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information. See the FAQ for guidance on how to improve it.
If you don't know where you are, you ask, "Where am I?"
The only legitimate use for "Where I am?" is in response to a question about the location of something that you think might be occupying the same general space you are. For example,
The point of difficulty is in recognizing that a form of be can function as an auxiliary verb. Questions in English are formed via Subject-Auxiliary Inversion. If the finite verb in a declarative sentence is any of the following (called auxiliary verbs):
the corresponding question is formed by placing a question word (if it's a content question) at the beginning of the sentence, and then placing the auxiliary verb after the question word (if any). Then put in the rest of the sentence (with the original auxiliary verb and the antecedent of the question word omitted).
For declarative sentences whose finite verb is not among the auxiliaries, for the purpose of forming a question you treat the sentence as if it contained an auxiliary do. For example.