-다 보니(까)

-다 보니(까) means 'as I kept doing A, I came to realize / it turned out B'.

이유·원인Reason & cause

Han: For a future result use -다 보면; -다 보니 reports what has already turned out.

Examples

매일 운동하다 보니 몸이 가벼워졌어요.Exercising every day, my body has become lighter.

한국에서 살다 보니 매운 음식도 잘 먹게 됐어요.Living in Korea, I've come to eat spicy food easily.

이야기하다 보니까 벌써 열두 시네요.We got talking and now it's already twelve.

V+다 보니(까)

살다 → 살다 보니, 일하다 → 일하다 보니까

The second clause is a discovery or a result that came about, usually in the past or present.
Compare -다 보면 for a general 'if you keep doing'.

Wrong: ~~열심히 공부하다 보니 합격할 거예요.~~

Right: 열심히 공부하다 보면 합격할 거예요.

For a future result use -다 보면; -다 보니 reports what has already turned out.

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