比如，你知道现在这么多学生背着的背包最初是为军队设计的吗？

Did you know, for example, that the backpacks that so many students carry today were originally designed for the military?

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你知道现在几点了吗？

What time do you have ?

《牛津词典》

你知道现在年轻人使用最多的社交软件是哪个吗？

Do you know which social app Chinese young people use a lot now?

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In fact, you could be sitting three years from now waiting before commencement and you can get that grade adjusted.

实际上，你可以从现在到知道毕业典礼前,一直坐等三年,你可以更正成绩。

麻省理工公开课 - 固态化学导论课程节选

If you don't know why you're about to eat cake like that you will soon, but you know this.

如果你现在还不知道为什么将要吃到那样的蛋糕,很快就会知道的，你清楚这一点。

哈佛公开课 - 计算机科学课程节选

If you did know how much time you had left, ? how would you act differently from what you're doing now?

如果你确实知道了自己还剩多少时间，你会和你现在的行为有不同吗？

耶鲁公开课 - 死亡课程节选