확인하지

In a sentence

• 내가 문서를 확인하지 않았다.

  I did not check the document.

  In this sentence, '확인하지' is part of the negative past tense indicating the act of not having cross-verified or checked something.

• 그가 이미 문제를 확인하지 않았나요?

  Didn't he already check the issue?

  Here, '확인하지' is used in an interrogative form, questioning whether the act of verification has taken place.

• 우리가 확인하지 않은 것들이 많아요.

  There are many things we haven't checked.

  Here, '확인하지' signifies the idea of incomplete tasks related to validation or assessment, expressing a present general state.