- (으)면 어떻게 해요?
→It is added to a stem of a verb or an adjective meaning 'a blame or a scold' that we should not treat the other party's word or an action in that way or 'complaint' about a certain action or a condition.
Example:
1. 11시 비행기인데 지금 오면 어떻게 해요?
Our flight time is 11 o'clock, how can you come now?
2. 그분은 그렇게 자주 약속을 지키지 않으면 어떻게 해요?
If he breaks his promise so often, how can we trust him?
3. 어제까지는 된다고 하고서 지금 안 된다고 하면 어떻게 해요?
You said you would get it done by yesterday, but what should I do since you say now it's impossible to do?
가: 지난주에 온 우편물은 버렸는데요.
I threw away the mail from last week.
나: 난 아직 보지도 않았는데 버리면 어떻게 해요?
I haven't even looked at it yet, so what should I do?
가: 불고기 양념에 설탕을 안 넣었어요.
I didn't put sugar in the bulgogi seasoning.
나: 불고기에다 설탕을 안 놓으면 어떻게 해요?
What if you don't put sugar on the bulgogi?