at that time in the past or future
Back then, we didn't have smartphones, so we played outside more.
그때는 우리가 스마트폰이 없어서 더 많이 밖에서 놀았어요.
next in order or time
First, mix the flour and eggs, then add the milk slowly.
먼저, 밀가루와 달걀을 섞은 다음, 우유를 천천히 넣으세요.
as a result or consequence
If it rains, then we will stay inside and watch a movie.
비가 오면, 우리는 안에 있으면서 영화를 볼 거예요.
in addition to what was said
She finished her work, and then she had to help her brother with his homework.
그녀는 일을 마친 후, 동생의 숙제를 도와야 했어요.
to summarize what was just said
So then, the main points are to be on time and bring your own materials.
그러니까, 중요한 점은 시간을 지키고 자신의 재료를 가져오는 것입니다.
to start or end a conversation or statement
Okay then, let's begin the meeting now that everyone is here.
좋아요, 모두 다 왔으니 회의를 시작합시다.
being the person in a role at that past time
The then mayor made that decision during the crisis.
당시 시장이 위기 동안 그 결정을 내렸어요.