你是新来的吗？ 我没见过你。

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

youdao

他们从来没见过你。

They've never actually met you.

youdao

我今天以前没见过你。

I've not seen thee before today.

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

Just to say a little bit about smallpox, because unlike chickenpox, which if you haven't had, you've probably seen a case of it.

我们稍微说一下天花,因为它不像水痘那样,就算你没得过你也见过

耶鲁公开课 - 生物医学工程探索课程节选