Indirect ways of asking questions

A number of expressions can be used to ask questions in a more indirect way. Indirect questions can sound more polite than direct ones.
Could you tell me where she studies?
We'd like to know when you first started singing?
When asking indirect questions the same word order is used as when we make statements. The auxilary verbs, do, does and did, are omitted.
If or whether is used if there is no question word such as where, what, why, when, who and how.
Could you tell us if/whether you are married...