-(으)ㄴ/는 탓에

-(으)ㄴ/는 탓에 gives the cause of a bad result and puts the blame on that cause.

이유·원인Reason & cause

Han: Passing an exam is a good result, so blaming the teacher with 탓에 sounds wrong; use 덕분에 to give credit.

Examples

제 실수 탓에 팀 프로젝트가 늦어졌어요.The team project was delayed because of my mistake.

길이 많이 막히는 탓에 약속 시간에 늦었어요.Because of the heavy traffic, I was late for the appointment.

날씨가 너무 더운 탓에 밖에 나가는 사람이 별로 없어요.Because it is so hot, hardly anyone goes outside.

어젯밤에 늦게 잔 탓에 수업 시간에 계속 졸았어요.Because I went to bed late last night, I kept dozing off in class.

V+(으)ㄴ 탓에 (past)

V+는 탓에 (present) · A+(으)ㄴ 탓에 · N+인 탓에 (or N + 탓에)

늦게 일어나다 → 늦게 일어난 탓에 / 바쁘다 → 바쁜 탓에

The result is usually negative or unwanted. For a good result, use -(으)ㄴ/는 덕분에 instead.
The second clause cannot be a command or suggestion (-(으)세요, -(으)ㅂ시다, -자); it states a fact or result.
With verbs, use -(으)ㄴ for a past cause (잔 탓에) and -는 for a present or ongoing cause (막히는 탓에). Do not use -았/었는 (잤는 탓에 is wrong).
With adjectives, use -(으)ㄴ: 더운 탓에, 바쁜 탓에. With nouns, use 인 탓에 or just 탓에: 제 실수 탓에.

Wrong: ~~선생님이 잘 가르쳐 주신 탓에 시험에 합격했어요.~~

Right: 선생님이 잘 가르쳐 주신 덕분에 시험에 합격했어요.

Passing an exam is a good result, so blaming the teacher with 탓에 sounds wrong; use 덕분에 to give credit.

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