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 wanted to warn you about that.

我本想要警告你们这件事的。

youdao

But I have to warn you.

但是我必须提醒你。

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

I have to warn you this third and final movie is an example of why this research is not currently done, but it illustrates an important scientific point.

我必须警告你们第三,和最后的影片是一个例子,关于为什么这个研究现在没有做，但它描述了重要的科学观点。

耶鲁公开课 - 心理学导论课程节选

We are no caped crusaders, but we are here to warn you there is a storm coming.

FORBES: Age of Context Draft Introduction

Although we have to warn you, reading this feature may cause an uncontrollable urge to jump over to eBay.

ENGADGET: A Brief History of Handheld Video Games

Also likely in 1999: drives that use predictive failure analysis to warn you of hardware problems that could hasten a crash.

CNN: More big honkin' hard drives in 1999