I know you did it—I just want to know why.

我知道这是你干的，我只是想知道为什么。

《牛津词典》

I don't know what they'll want when they arrive—we'll have to play it by ear.

我不知道他们到达时需要什么—我们只有见机行事了。

《牛津词典》

I want him back, but I just don't know how to go about it.

我希望他回来，可我就是不知道怎么去做这件事。

《柯林斯英汉双解大词典》

Let us say I want to sell my car but I do not know exactly how much it is worth.

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But if you want to know the answer, and I knew it, but I forget what it is-- it doesn't matter.

如果你想知道答案,我曾经是知道答案的,不过我忘掉了,这不重要

耶鲁公开课 - 心理学导论课程节选

OK. I know. It looks boring. But it's a structure of the things I want to think about when I go through trying to take a problem and mapping it into a iterative program.

好，我知道这看起来有点无聊,但是这是我要去以迭代的方式,去解决一个问题采取的,措施的大致结构。

麻省理工公开课 - 计算机科学及编程导论课程节选

In particular, I want to know if it was motivated by anything Grisham had said in class previously.

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What I am saying is that I want to know about it.

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And let me tell you -- I love you, too -- but let me explain something to all the fellas, because I want you to know what it takes.

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