I shouldn't have done that.
我真不该那样做。
shouldn't have done sth.“本不该做某事”
I really screwed up this time.
这次我真的把事情给弄糟了。
I really messed up.
我真的搞砸了。
I screw up=mess up“把…弄糟，搞砸”
I'm sorry to have missed the chance.
= I regret having missed the chance.
我很后悔错过了那次机会。
I regret that I was angry with my son.
= I regret being angry with my son.
我后悔不该对儿子发火。
I have regrets about not telling my friend the truth.
我后悔没有告诉朋友实话。
本句中的“regret”用作名词。
我真是很懊悔，把你最喜欢的包给弄坏了。
I feel so regretful; I have damaged your favorite bag.
damage v. 破坏，损害
My words have hurt her. If only I hadn't said it like that.
我的话伤害了她。我要是没那样讲话就好了。
hurt v. 伤害，刺痛
if only“要是…就好了”
I went a little far.
= I overdid it.
我做得有点过分。
I made a mistake.
我犯了错了
overdo v. 把…做得过分
go too(a little)far“做得太（有点儿）过分”
I really wish I hadn't done it．
= If only I hadn't done it.
我真希望我没那么做。
I feel so guilty about forgetting our anniversary.
我竟然忘了我们的周年纪念日，我感到很内疚。
guilty a. 内疚的
anniversary n. 周年纪念
2.实用对话
Regret后悔
Mary: Hi, Tony. You look unhappy. What's wrong?
玛丽：嗨，托尼。你看起来不高兴。怎么了？
Tony: Oh, Mary. I made a big mistake.
托尼：哦，玛丽。我犯了个大错。
Mary: What happened?
玛丽：发生什么事了？
Tony: I really wish I hadn't done it.
托尼：我真希望我没那么做。
Mary: What on earth are you talking about?
玛丽：你究竟在说什么呢？
Tony: I got caught cheating. I feel so ashamed. The teacher saw me and told me I failed.
托尼：我考试作弊被抓了。我感觉太丢人了。老师看见我了，还告诉我这次考试不及格了。
Mary: What were you thinking?
玛丽：你想什么呢？
Tony: You know my father. If I fail, he'll kill me. I have to do well．
托尼：你知道我爸爸的。我要是考试不及格，他会杀了我的。我必须得考好才行。
Mary: But what you should do is study hard.
玛丽：可是你应该做的是好好学习啊。
Tony: I know...l know...it's all my fault. I feel awful that I didn't study, and I cheated, and I got caught.
托尼：我知道…我知道…都是我的错。我不学习，还作弊，结果还被抓了，这真是太糟了。
Mary: So long as you learn from your mistakes.
玛丽：只要你吸取教训就好了。
Tony: I know. I feel like a failure. My father is going to be so disappointed when e finds out what I've done.
托尼：我知道。我觉得自己太失败了。我爸爸要是知道我做了些什么的话，他一定会很失望的。
3.详细解说
1.“wish”后面所接的宾语从句要使用虚拟语气结构——(1)表示对现在情况的虚拟：从句中谓语动词要用“动词过去式或were”；(2)表示对过去情况的虚拟：从句中谓语动词要用“had+动词过去分词”；(3)表示对将来情况的虚拟：从句中谓语动词要用“would/could+动词原形”。例如：I wish I knew the answer.（我希望我知道答案。）I wish I hadn't said that.（我希望我没讲过那样的话，）I wish it would rain tomorrow.（我希望明天下雨就好了。）需要注意的是，在表示对过去情况的虚拟时，从句中的谓语动词有时也可以用“would/could+have+过去分词”，例如：I wish I could have seen her last night.（要是我昨天晚上能够见到她该多好。）
2.“on earth”的意思是“究竟，到底”。
4.文化洗礼
“regret”的用法
在这一课中大家学习了“后悔”的表达方法，可你真的掌握了“regret”的用法了吗？先来看两个错误的例句吧。
（错） In any case I didn't regret to stay at home.
（错）I now regret not to have worked harder at school.
上面两个句子的正确形式应该是：
（对 In any case I didn't regret staying at home.无论如何我都不后悔留在了家里。
（对） I now regret not having worked harder at school．我现在后悔在学校时没有努力学习了。
“regret doing something”表示“对已经做过的事情感到后悔或遗憾”。
而“regret to do”则表示“对即将要做的事情感到遗憾或抱歉”。例如：I regret to inform you that your contract will not be
renewed.
我很遗憾地通知你，我们将不会与你续约，另外，“regret”后也可接“that从句”，具体含义要视具体情况而定。例如：
He was beginning to regret that he'd come along.
他行始后悔跟着来了。
I regret that I will be unable to attend.
很抱歉我没法出席。
