"I do not regret it." he said. "It is better to be defeated battling for an honest idea, than to win by a cowardly trick."

VOA: special.2010.05.27

Because you will come to regret it if you don't do it. But we're not going to grade it.

但是我们不会对此计分,因为不计分所以让你们。

麻省理工公开课 - 计算机科学及编程导论课程节选

But still she contacted this person, spent time with him and later came to regret it.

但你的朋友还是联系了这个人，跟他相处了一段时间，慢慢有点后悔了。

I should have 课堂 - SpeakingMax英语口语达人

Sometimes,people say something to a friend or family member that they later regret because it hurts that person's feelings.

VOA: special.2010.06.20

I've seen many people not react that way, and probably regret it.

我知道很多人没有这样做，现在他们可能后悔了。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

Present me with such a plan, and I will praise it with pleasure and accept it without the slightest feeling of regret."

VOA: special.2009.03.19

It's great for expressing regret, both for yourself or for a friend,

你可以为你自己或是你的朋友表达后悔之意。

I should have 课堂 - SpeakingMax英语口语达人

It is something they now deeply regret, because,she says,"the promises of the Orange Revolution were not kept."

VOA: standard.2010.02.14

It can be an expression of regret for your personal actions.

这可以用来表示你后悔自己所做的事情。

I'm sorry 课堂 - SpeakingMax英语口语达人