I'll never ever do that again!

我再也不会干那种事了！

《牛津词典》

"If he ever gets angry at me, I'll never go and see him again," said Mary.

玛丽说：“如果他生我的气，我就再也不去见他了。”

youdao

Then aged 71, he recalls giving an unequivocal response: “I will never, ever run a company again.”

他回忆起，那时71岁的他给出了一个坚定的答复：“我将不会，永远不会再领导一个公司。”

youdao

We have to move as quickly as we possibly can to make sure this never ever happens again.

CNN: Solicitor General Ted Olson

This must never, ever happen again.

CNN: Jackson: Candidates 'represent hope and healing'

As an American president, we can never, ever allow again a major city, a major population center in our country go through what New Orleans, what the Gulf states did as a result of the kind of neglect from an American president.

CNN: Part I: CNN/YouTube Democratic presidential debate transcript