줄 몰랐네

I didn't know that

→ 줄
phrase Rare #14,342
I didn't know that Used to express surprise upon realizing something. The ending 네 adds a sense of discovery or surprise, and the phrase is commonly used in informal speech.
KO: 네가 이렇게 요리를 잘하는 줄 몰랐네.
EN: I didn't know you were such a good cook.

자네가 그렇게 깊이 생각하는 줄 몰랐네

I didn't know you thought so deeply.

— 무인 곽원갑 (2006)

집에 있는 줄 몰랐네

I didn't know you were home.

— 어바웃 타임 (2013)

그래도 여자를 좋아하는 줄 몰랐네

I didn't know you liked women, though.

— 귀향 (2006)

오늘 만나게 될 줄 몰랐네

I didn’t expect to see you today.

— 오펜하이머 (2023)

자는 줄 몰랐네

I didn’t realize you were asleep.

— 빈폴 (2019)

둘이 문제 있는 줄 몰랐네

I didn’t know there was a problem between the two of them.

— 페인 앤 글로리 (2019)