않았느냐

In a sentence

• 그가 사실을 말한 적이 없지 않았느냐?

  Hasn't he ever told the truth?

  In this sentence, "않았느냐" is used as a rhetorical question, emphasizing the negation of the subject's action in the past.

• 나는 너에게 이것을 설명하지 않았느냐?

  Haven't I explained this to you?

  Here, "않았느냐" expresses a sense of questioning and reaffirmation about an action performed by the speaker.

• 우리가 벌써 모두 준비하지 않았느냐?

  Haven't we already prepared everything?

  This sentence uses "않았느냐" as a soft query regarding a completed action, seeking agreement or confirmation.