"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

This is great when you want to express regret for something that you perhaps did not do.

当你想表达对一些过去没做成的事情感到后悔时，你可以使用这个句型。

I should have 课堂 - SpeakingMax英语口语达人

She did not wish to act quickly and do anything she might regret.

VOA: special.2009.09.05

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

I can't bring myself to regret the decisionsthat brought me face-to-face with death.

VOA: standard.other

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

The president and chairman of BP America,Lamar McKay, again expressed his company's sorrow and regret for the incident, and promised that BP will pay for all damages related to the disaster.

VOA: standard.2010.06.15

Another situation where you can use "I wish" is when you express regret, a desire to stay longer, for example.

另一种使用“I wish”的情况是当你表达遗憾的时候，例如，希望多待一段时间。

I wish 课堂 - SpeakingMax英语口语达人

Remember you can say "I'm sorry" when you wish to express your regret, your sympathy or ambiguous regret.

记住，当你想表达歉意、同情或是含糊的道歉时，你都可以用“I'm sorry”。

I'm sorry 课堂 - SpeakingMax英语口语达人

In the next example you can use "I'm sorry" not to express regret for your personal fault.

下一个例句中，“I'm sorry”的使用并不是用来表达对个人过失的抱歉。

I'm sorry 课堂 - SpeakingMax英语口语达人