当“then”表示时间或者事物的先后顺序时，替换词有：
Next, so later, after that, afterwards
1.I finished my work and I was feeling tired. So later when I got home, I had a nap.
我完成工作之后觉得非常累，之后就回家睡了一觉。
2.Let's go out now and eat afterwards.
我们现在出去吧一会再去吃饭。
3.Shortly afterwards I met my ex again.
不久之后，我又遇到了我的前任。

当“then”表示“而且，此外”的意思时，替换词有：
Further, furthermore, moreover, in addition, additionally
1.He is old and unpopular. Furthermore, he has only 2 years of political life ahead of him.
他年纪大了又不得人心。而且，他也只有两年的政治生命了。
2.I choose you because you can speak Cantonese, moreover, you are the only person I can think of who is capable of doing this job.
我选择你是因为你能说粤语。而且，你也是我能想到的能胜任这份工作的唯一人选。

and then some 而且远不止这些
The final was killing us. It includes 40 multiple choice questions, one short essay question, 10 true or false questions, and then some.
这次期末考试太让人痛苦了。它有40道多选题，一个简答题，10道判断题，而且还远不止这些。

but then 不过，话又说回来
I was about to argue with him, but then I realized that he might be right.
我正准备和他争论，不过我又意识到，他也许是对的。