at that time in the past or future
Back then, we didn't have smartphones, so we played outside more.
那時候,我們沒有智慧型手機,所以我們在外面玩得更多。
next in order or time
First, mix the flour and eggs, then add the milk slowly.
首先,混合麵粉和雞蛋,然後慢慢加入牛奶。
as a result or consequence
If it rains, then we will stay inside and watch a movie.
如果下雨,那麼我們就待在室內看電影。
in addition to what was said
She finished her work, and then she had to help her brother with his homework.
她完成了工作,然後還得幫弟弟做功課。
to summarize what was just said
So then, the main points are to be on time and bring your own materials.
那麼,主要要點就是準時並自帶材料。
to start or end a conversation or statement
Okay then, let's begin the meeting now that everyone is here.
好吧,既然大家都到了,我們就開始會議吧。
being the person in a role at that past time
The then mayor made that decision during the crisis.
當時的市長在危機期間做出了那個決定。