- I want to know where he is.
- I want to know where is he.
- I want to know where the hell are we.
- I want to know where the hell we are.
All these sentences are questions, but phrased as a sentence. In question, I know, in a questioning statement, "Where is he?" is correct, and "Where he is?" is not correct. But I'm not sure in the case of a statement. Is there a rule for this? Both statements are valid?
May be only one statement is valid in writing English, but both are valid in casual spoken English?