English Question Word Order

Word order in questions can vary depending on a couple of things. First, is there a "wh" question word (i.e. who, what, when, where, why, how, which, whose, whom)? If not, is there just a main verb or also an auxiliary verb in the question? Each of these can influence the placement of words like verbs in a question.

Examples:
Where are my keys?
What did you do?
Does she play piano?
Will you stop by after work?

In the above examples, the verbs (main, auxiliary, phrasal) are italicized. In questions that have more than one verb but no question or "wh" word, the auxiliary verb will be placed at the beginning, followed by the subject and then the main verb. If a question word occurs, it will be in the first position, followed by an auxiliary (second example) or main verb (first example). The last example contains a modal verb, which follows the same pattern as questions with an auxiliary verb.