몰라

In a sentence

• 그가 어디에 있는지 몰라.

  I don't know where he is.

  Here, '몰라' is used to express a lack of knowledge about a location or state.

• 왜 그렇게 됐는지 난 정말 몰라.

  I truly don't know why it turned out that way.

  In this sentence, '몰라' conveys uncertainty or lack of understanding about a situation or reason.

• 그 책이 언제 출판됐는지 몰라.

  I don't know when that book was published.

  Here, '몰라' indicates unawareness regarding the timing of an event.