V/A + -(으)니까 – Because / since (Subjective Reason & Suggestion)
Meaning: Because / since (states a reason supporting a command, suggestion, or judgment)
Conjugation & Pattern
- Stem without patchim or ending in ㄹ (drop ㄹ) + -니까 (가니까, 바쁘니까, 사니까)
- Stem with patchim + -으니까 (먹으니까, 추우니까, 들으니까)
- Past: V/A + -았/었으니까 | Noun (N): (이)니까
Detailed Usage
Expresses a reason or basis for the main clause. Unlike '-아/어서', '-(으)니까' CAN be followed by imperatives (-(으)세요) and propositives (-(으)ㅂ시다, -(으)ㄹ까요?), and CAN take past tense (-았/었으니까).
Example Sentences
- 1
밖이 추우니까 옷을 따뜻하게 입으세요.
Bakki chuunikka oseul ttatteuthage ibeuseyo.
Since it is cold outside, please dress warmly.
- 2
지금 길이 막히니까 지하철을 탑시다.
Jigeum giri makhinikka jihacheoreul tapsida.
Since the road is congested right now, let's take the subway.
- 3
내일 시험이 있으니까 오늘 일찍 자요.
Naeil siheomi isseunikka oneul iljjik jayo.
Since we have an exam tomorrow, let's go to bed early today.
Important Notes
Do not use '-(으)니까' in formulaic greetings, thanks, or apologies (such as 반갑습니다, 고맙습니다, 미안합니다 -> use -아/어서 instead).