Re: a statement in the form of a question?
Ata, you will do yourself a big favor if you stop thinking about this as "question form" right away.
The word order is "inverted" in that the subject comes after the verb. Yes, many questions are formed this way, but not all (How are you? He did what??), and many statements use this order then they are not questions at all.
When you start a sentence with a negative or restrictive word or phrase (never, rarely, not only, etc.) you invert.
You can also invert when you start your sentence with with some adverbial phrases:
Into the hole scurried the little mouse. Up the hill marched the soldiers.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.