Questions may have the assertive form with the interrogation expressed simply by the tone of the voice, or may be introduced by an interrogative pronoun, adjective, adverb, or particle.
a. A question gains in animation and has its emphatic part clearly marked if the interrogative word is placed late in the sentence. Thus, ἡδέα δὲ καλεῖς οὐ τὰ ἡδονῆς μετέχοντα;
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].