The indirect interrogatives are made up of:

•			a principal clause with an interrogative verb such
		as to ask, to wonder or to discuss...

•			a subordinate clause introduced by an interrogative
		term (if, whether, where, when, why, how, who, which,
		what or whose).

The verb of the subordinate clause is placed after the
subject, as with non-interrogative sentences.

Example:

We discussed what kind of present we could offer her.