줄은

In a sentence

• 나는 내일 등산을 갈 줄은 몰랐어.

  I didn't know I was going hiking tomorrow.

  In this sentence, '줄은' is part of the expression '갈 줄은', indicating the speaker's lack of knowledge regarding the action of going hiking.

• 까만 양말을 빨아야 했는데, 줄은 이미 목욕탕에 있었어요.

  I needed to wash black socks, but the laundry line was already in the bathroom.

  Here, '줄은' refers to a literal 'line' (줄), specifically indicating its position as the subject being in the bathroom.

• 내가 줄은 길다고 했지?

  Didn't I say the line was long?

  In this instance, '줄은' refers specifically to a 'line' (줄) and used to point it out while discussing its length.