-기(가) 바쁘게

-기(가) 바쁘게 shows that the next action follows the first one immediately, often in a hurry, as if there were no time to wait.

시간·순서Time & sequence

Han: -기가 바쁘게 describes events that actually happen, so it sounds unnatural in a request; use -자마자 (or -는 대로) for commands and requests.

Examples

그는 집에 들어오기가 바쁘게 컴퓨터부터 켰다.As soon as he got home, the first thing he did was turn on the computer.

수업이 끝나기가 바쁘게 아이들은 운동장으로 뛰어나갔다.The moment class ended, the children ran out to the playground.

월급이 들어오기가 바쁘게 카드값으로 다 빠져나가요.As soon as my salary comes in, it all goes out on my credit card bill.

신제품이 나오기가 바쁘게 다 팔렸다.The new product sold out as soon as it came out.

-기(가) 바쁘게vs-는 대로-는 대로 is for future plans, promises and requests; -기가 바쁘게 describes what did or usually happens: 도착하는 대로 연락드리겠습니다.

V+기(가) 바쁘게

끝나다 → 끝나기(가) 바쁘게

Do not put the past marker -았/었- before 기: say 끝나기가 바쁘게, not 끝났기가 바쁘게. Tense is shown only at the end of the sentence.
It usually describes events that actually happened or happen habitually; it sounds unnatural with commands, requests or suggestions — use -자마자 or -는 대로 there.
It attaches to verbs, not adjectives, and the two clauses may have the same or different subjects.
It has a vivid, slightly literary tone and is common in narratives, news and essays rather than casual small talk.

Wrong: ~~회의가 끝나기가 바쁘게 저한테 연락해 주세요.~~

Right: 회의가 끝나자마자 저한테 연락해 주세요.

-기가 바쁘게 describes events that actually happen, so it sounds unnatural in a request; use -자마자 (or -는 대로) for commands and requests.

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