Do you happen to know the title of this oil painting?

你知道这幅油画的名字吗？

youdao

Do you happen to know her trouble?

你碰巧知道她的麻烦吗？

youdao

Do you happen to know…?

说不定你知道……吧？

youdao

Now the question you'd need to ask yourself is how do you know this didn't happen to you last night?

现在你要问自己的问题是,你怎么知道,昨晚你没发生这样的事？

耶鲁公开课 - 死亡课程节选

that you know it's not going to happen or you know it's not useful to do.

你知道这事没发生的可能，或者这么做并不会起到什么作用。

The thing is 课堂 - SpeakingMax英语口语达人

And yeah, I know you know how to do it, but let's think about what might happen if I wanted to do that.

对，我知道你们知道该怎么做，那么让我们看看如果我,想要完成的话会发生什么。

麻省理工公开课 - 计算机科学及编程导论课程节选

Do you know what would happen to me this afternoon if I started having the symptoms Joan did?

CNN: Transcript: Clinton speaks on 'patients' bill of rights'

But if we do have a cold spell, you know what will happen: So many folks will find it difficult to pay the price.

CNN: Clinton's November 19, 2007, speech on economic challenges