I know that my tears will never cheat me.

我知道，我的眼泪从来不会欺骗我。

youdao

I've never cheated others and at the same time I don't let anybody else cheat me.

我从来也没有欺骗过别人，同时也不允许别人欺骗我。

youdao

I never cheat on any school tests, but my friend once asked me to help him cheat on an English exam.

我在学校考试时从未做过弊，不过我的朋友曾要我在英文考试帮他作弊。

youdao