What did you do?
That was a mistake.
I blew it. 我失败了。
I wish I hadn't done that.
I really screwed up this time. 弄糟了
I really messed up.
I should have known better.我早该弄清楚一些 * should have done早该
I shouldn't have said that.
It's too late now.
I wish I wouldn't have said that.
He's married.
I should have known. 我早该知道了
I acted like a fool.
It was careless of me to do so.
It was thoughtless of me to do such a thing.
It was hasty of me to do so.
I was careless.
I regret doing that.
I know what you mean.
I regret my actions.
I repent my actions.
I am sorry for what I have done.
Why did you drive my car?
I had no choice.
I couldn't help it.
I had no other choice.
I had no choice in the matter.
There was nothing else I couldn't have done.
It was my only choice.
You shouldn't have done that.
I know, I went too far. 我做得太过分了
I overdid it.
Did you ask her out?
No, I was too nervous.
I was too uptight.
I wish I had studied harder. 我要是再用功点就好了*..wish..had done要是..就好了
I regret not studying harder.
I should have studied harder.
I should have asked him.
Why didn't you?
I wish I had asked him.
It would have been better to have asked him.
Did you remember to tell her?
Sorry, it slipped my mind.不小心给忘了
I just forgot.
I forgot all about it.