你是新来的吗？ 我没见过你。

Are you new here? I haven't seen you around.

youdao

我没见过你的兄弟，更谈不上和他谈话了。

I didn't even see your brother, much less speak to him.

youdao

我所知道的就是我现在在这，而且我没见过你。

All I know is that I'm here, and I've never met you before.

youdao

I mean, you may not understand it with algebra before but some of these sorts of pictures have you seen before?

我是说可能代数部分你没看懂,但你们以前见过类似的图像吧

耶鲁公开课 - 博弈论课程节选

I love doing because you're going to... you might find something that you didn't see the first time.

我喜欢这样做，因为你或许可以发现一些你以前没见过的东西。

大都会艺术博物馆 - SpeakingMax英语口语达人

I should also warn you that this code includes some Python concepts, at least one, that you have not yet seen.

我得事先说明这个代码中,包括了一些你没见过的Python语言的概念，至少一个。

麻省理工公开课 - 计算机科学及编程导论课程节选