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

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

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

"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

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

I mean, why didn't you justlet the van crush me and save yourself all this regret?

VOA: standard.other

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

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

VOA: standard.other