It seems only right to warn you of the risk.

似乎应该警告你有风险。

《牛津词典》

I should warn you, princess.

我应该警告你，小公主。

youdao

I wanted to warn you about that.

我本想要警告你们这件事的。

youdao

Your friend may,however, warn you not to wear your heart on your sleeve.

VOA: special.2010.07.18

And as an added incentive for you to pay attention, I'm going to warn you that this particular simulation will appear in the final or a variant of it.

作为提高你们注意力的激励，我要警告你们,这个特殊的仿真程,或者它的变种会再期末考试出现。

麻省理工公开课 - 计算机科学及编程导论课程节选

But the other approach, and the one that I should warn you I'm going to take this semester, in this class, is rather different.

而另一种方法，我要提醒你们,我这个学期将采用，这个课题是不同的。

耶鲁公开课 - 死亡课程节选

The app should warn you on launch to make sure Find My iPhone is activated.

FORBES: Connect

"I warn you, it is ham, " Lane's character says, always ready with a quip.

WSJ: Review: Nathan Lane shines in 'The Nance'

If an image's resolution is too low, KeepShot will warn you before you submit the book.

WSJ: Review of KeepShot: Hassle-Free Photo Books in One Couch Sitting