I'm really sorry about that

遗憾───regret

I regret my bad action.───我悔恨自己的不良行为.

The police offered no expression of regret at his wrongful arrest.───警方对错抓他没表示出丝毫歉意.

I can play the piano by ear, but I regret now that I never learned to read music properly.───我能不看乐谱弹奏钢琴, 不过现在我后悔没有真正学会识乐谱.

I regret having to tell you to leave [ I regret to have to tell you to leave ] .───很抱歉,我现在得叫你 走.

To his regret, he couldn't catch the train.───他没能赶上火车,很后悔.

I regret to have told him the thing.───我后悔告诉了他这件事.

The Prime Minister expressed her regret at the failure of the talks.───首相对谈判失败表示遗憾.

One single slip brings eternal regret , and looking back, your whole life has passed away.───一失足成千古恨, 再回头已过百年身.

She felt sudden pangs of regret.───她突然感到痛悔不已.

Much to my regret you weren't at home when I called.───奉访未晤,甚怅.

We regret to learn from your letter that...

I didn't regret the choice I had made.

We regret that we are unable to .....

I regret not studying harder.

We regret to inform you that...

One wrong thought may cause a lifelong regret.

I deeply regret what I said.

He felt a kind of happiness mingled with regret.

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