This is the dialogue which I heard in a TV show:

The father asks: I heard your mission failed, Ranmaru.

Ranmaru: Yes, it did fail.

Why doesn't he say yes, it failed?

  • 5
    Sometimes did and do are used in afirmative forms for emphasise. Here it's the same, it's used for emphasising that the mission failed. – user33000 Aug 20 '16 at 4:49
  • I decided to roll the question back to the original because the last edit seems to misunderstand the OP's intent, even though I heard your mission would be more appropriate. – Damkerng T. Aug 21 '16 at 8:14
  • @Avicenna You should expand that comment to an answer. – James K Aug 21 '16 at 8:20