我不知道。不，我知道不假，但不打算告诉你。

I don't know. Correction—I do know, but I'm not going to tell you.

《牛津词典》

我要是知道点儿什么，我肯定告诉你，可我不知道。你现在说的对我还是新闻呢。

I'd certainly tell you if I knew anything, but I don't. What you're saying is news to me.

《柯林斯英汉双解大词典》

你知道，我不知道任何故事。

You see, I don't know any stories.

youdao

And so he explains to the master: I knew thou was't an hard man which reapest where thou sowedst not and gatherest where thou strawest not.

他对主人解释：,我知道你不是个努力的人,你收获不是你播种的。

耶鲁公开课 - 弥尔顿课程节选

So they've got these superhighways which is, I don't know if you've seen them, they are marked on in blue.

所以，他们修了这些高速路，我不知道你见过没有，他们被标成蓝色了。

伦敦的蓝色自行车 - SpeakingMax英语口语达人

This is on purpose, because one of the things I hope you have learned to do this semester, is look up things you don't know, and figure out what they do. What they mean.

我举这个程序是有目的的，因为我希望你们这续期能学到,如何去查找你不知道的东西并，且弄懂它,们是干什么的，是什么意思。

麻省理工公开课 - 计算机科学及编程导论课程节选