I know that he has tried hard; be that as it may, his work is just not good enough.

我知道他已经尽力了，尽管如此，他的工作仍不太理想。

《牛津词典》

I don't know whether that's true or not, but it may very well be.

我不知道这一说法是否真实，但是它很可能恰如其分。

youdao

I know that may sound contrary to what others may tell you, but it really is best not to put your emotional well-being on the line.

我知道这听起来可能与其他人告诉你的东西相反，但是确实最好不要拿你的感情幸福冒险。

youdao

And for me it's fun because I may not know the novel that you end up picking, and so it is a kind of challenge for me to take a novel that you've chosen and come to grips with it myself It may be one that I know.

我也觉得很好玩,因为我可能不知道你们最后选择的小说，所以对我来说,认真对待你们选的一本书很有挑战性,可能是一本我知道的书。

耶鲁公开课 - 1945年后的美国小说课程节选

But what you may not know, you may not know this because I didn't know this until recently, it's actually based on a book.

NPR: Sony's Secretive 'Da Vinci Code' Marketing Plan

And the Patriots weren't actually when that someone that we've never seen before, and you know, frankly, I mean, it may not see again.

NPR: Really Important Football Game Coming

"You know you may not believe it, but I've actually gone hunting, " she said during a riff about gun control and protecting the Second Amendment.

CNN: 'Bittergate' sparks new look at candidates and guns