表示过去：
1 Only then did he realize he had made a mistake. 在那时候他才意识到自己犯了错误。
2 What did you do to solve the problem then? 你那时候是怎么解决问题的？
表将来
1 I will be waiting for you in the park then. 到那时候我会在公园等你。

He stood up ,and then walked out = 他站了起来，然后走了出去。
哦，原来如此！
I was very glad when I heard from her. = 当我收到她的来信时，很高兴。

1.then多数用于“然后”这个意思属于副词(adv)
I swam in the swimmingpool and then I went home last night.
昨天，我在游泳池中游泳然后回家了。
2.还有“那时”的意思，也是副词（adv）www.souquanme.com
I was a student then.
我那时还是一个学生
祝学习进步！

then 英 [ðen] 美 [ðɛn]
adv. 然后; UKWYr 那么; 那时; 话说回来;
adj. 搜趣网 当时的; 那时的;
[例句]'I wasn't a very good scholar at school.' — 'What did you like doing be//www.souquanme.comst then?'
“我在学校时成绩不大好。”——“那么你当时最喜欢做什么呢？”
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