Korean grammar patterns › Level 3
-(으)ㄴ/는 줄 알다/몰랐다
thought (wrongly) that … / didn't know that …
Level 3 · TOPIK II · intermediate
How to use it
-(으)ㄴ/는 줄 알았다 = I thought that… (but it wasn't so). -(으)ㄴ/는 줄 몰랐다 = I didn't know that… (but it was so). Verbs: -는 present, -(으)ㄴ past, -(으)ㄹ future; adjectives -(으)ㄴ; nouns 인.
Forming it
| 오다 | → 오는 줄 알았어요 |
| 결혼하다 | → 결혼한 줄 몰랐어요 |
| 비싸다 | → 비싼 줄 몰랐어요 |
| 토요일 | → 토요일인 줄 알았어요 |
Mostly used in the past tense (알았다 / 몰랐다).
Examples
오늘이 토요일인 줄 알았어요.
I thought today was Saturday.
이 가방이 이렇게 비싼 줄 몰랐어요.
I didn't know this bag was so expensive.
Compared with similar patterns
-(으)ㄹ 줄 알다/모르다 after a verb means know / not know HOW to do something, not 'thought that'.