Question

시간 가는 줄 몰랐어요 The -(으)ㄹ part can be replaced with other modifiers like -(으)ㄴ or -는. The pattern can follow adjective stems. 알다 and 모르다 verbs can also occur in the past tense form. All these variations produce other meanings related to the concept wrong presumptions or knowledge ignored by the speaker.

Accepted Answer

I must have lost track of time

Front	시간 가는 줄 몰랐어요
Back	I must have lost track of time
Notes	The -(으)ㄹ part can be replaced with other modifiers like -(으)ㄴ or -는. The pattern can follow adjective stems. 알다 and 모르다 verbs can also occur in the past tense form. All these variations produce other meanings related to the concept wrong presumptions or knowledge ignored by the speaker.

시간 가는 줄 몰랐어요 I Lost Track Time