-다가는

-다가는 warns that if you keep doing something (or do it at all), something bad will happen.

조건·가정Conditions & what-ifs

Han: -다가는 is used to warn about bad outcomes; passing an exam is a good result, so -다 보면 is needed.

Examples

수업 시간에 계속 졸다가는 선생님께 혼날지도 몰라요.If you keep dozing off in class, you might get scolded by the teacher.

이렇게 매일 늦게 자다가는 건강이 나빠질 거예요.If you keep going to bed this late every day, your health will get worse.

그렇게 돈을 쓰다가는 월말에 한 푼도 안 남겠어요.If you keep spending money like that, you won't have a penny left by the end of the month.

부장님 앞에서 그런 말을 했다가는 큰일 나요.If you say something like that in front of the manager, you'll be in big trouble.

V+다가는

V+았/었다가는

먹다 → 먹다가는, 말하다 → 말했다가는

The second clause must be an undesirable result. For good or neutral results use -다 보면 or -(으)면.
The result clause is a prediction, usually ending in -(으)ㄹ 거예요, -겠어요, -(으)ㄹ지도 몰라요 or set phrases like 큰일 나요. It does not end in the past tense, a command or a suggestion.
Plain -다가는 suggests continuing or repeating an action. -았/었다가는 is used for a single action that would cause trouble if done even once.

Wrong: ~~열심히 공부하다가는 시험에 합격할 거예요.~~

Right: 열심히 공부하다 보면 시험에 합격할 거예요.

-다가는 is used to warn about bad outcomes; passing an exam is a good result, so -다 보면 is needed.

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