She has not shown any real regret for what she did.

她对自己做过的事还没有表现出真正后悔的样子。

《牛津词典》

I deeply regret what I said.

我非常后悔说了那些话。

《牛津词典》

It won't be long before you regret what you have done.

过不了多久，你就会后悔你做的事。

youdao

What, you think I regret saving you? I can see that you do.I just... I don't know why.

VOA: standard.other

And it turns out that if you actually ask dying people, or really old people basically, "What do you regret from your life?"

结果发现，如果你问临终的人，或者很老的人，“你生命中有什么让你很后悔的？”

耶鲁公开课 - 心理学导论课程节选

We're all going to die and we're all going to regret what we did.

我们终将死亡，为我们的所为而后悔。

耶鲁公开课 - 现代诗歌课程节选

We deeply regret what happened and are working tirelessly to regain the trust of our community.

FORBES: Blippy Apologizes For Google-Searchable Credit Cards, Announces New Security Plan

The judge said the defendant had told a psychiatrist he did not regret what he had done.

BBC: Wrexham job centre fire threat: Stuart Jones jailed

As the class of 2011 prepares to enter the workforce, they should know what their predecessors regret most.

FORBES: What College Graduates Wish They Had Done Differently