since then 的意思是“从那时至今”，其音标为：[sɪnθ] [ðen]。since then 通常用于描述某事从某一点开始持续到现在，或者描述某事发生后过了多久。用法上，since then 通常与现在完成时连用，表示过去某个时间点发生的事情对现在的影响。

since then的意思、释义、用法及双语翻译中文翻译和常见用法如下：

since then的意思是：从那时至今

since then的释义：从那时至今

since then的用法：since then可以用于过去时态和现在时态。

双语翻译：

- 英文：Since then

- 中文：从那以后

常见用法：

1. I haven't heard from him since then. 从那以后我就没和他联系过。

2. Since then, she's been working hard to make a better life. 从那以后，她一直努力工作以改善生活。

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since then的意思：从那以后

释义：自那以后，此后

用法：since then 通常用于完成时态，表示某个动作或变化从过去的某个时间点一直持续到现在。

双语翻译：自从那时以来

常见短语：

1. since then has been

自从那时以来一直

2. since then has done

自从那时以来已经做了某事

3. since then has been doing

自从那时以来一直在做某事

4. since then has been changing

自从那时以来发生了变化

5. since then it has been

自从那时以来一直是

6. since then it has been doing

自从那时以来一直在做某事

7. since then it has been happening

自从那时以来一直发生某事

8. since then it has been going on

自从那时以来一直持续着

9. since then it has been a long time

自从那时以来已经过了很长时间

10. since then it has been a lot of changes

自从那时以来发生了很多变化。