When to use big problem in Korean

When to use it

큰일이다 means "this is a big problem" or "oh no." People say it when something bad happens or when they are worried about trouble. You can use it in many daily situations, like being late, losing something, or forgetting homework.

Example sentences

1. 집에 열쇠를 두고 나왔어. 큰일이야.

   I left my key at home. This is a big problem.

2. 숙제를 안 했어. 큰일이야.

   I didn't do my homework. This is a big problem.

3. 비가 오는데 우산이 없어. 큰일이야.

   It's raining, but I don't have an umbrella. This is a big problem.

4. 엄마, 냉장고에 우유가 없어요. 큰일이에요.

   Mom, there is no milk in the fridge. This is a big problem.

5. 가게에서 지갑이 없어요. 큰일이에요.

   My wallet is missing at the store. This is a big problem.

6. 기차가 곧 출발해요. 아직 역에 못 왔어요. 큰일이에요.

   The train leaves soon. I still haven't gotten to the station. This is a big problem.