表達遺憾，最常用的句型：

句型1：
I wish I had done sth.
我希望我做了某事。
I wish I hadn't done sth.
我希望，我沒有做某事。
I wish I had checked the weather this morning.
我要是今天早上看了天氣就好了。
I wish I had done more exercises then.
我希望那時候，多運動就好了。
I wish I hadn't eaten so much.
我希望我沒有吃那么多。

句型2：
If only I'd done sth.
我要是做了...就好了。
If only I had some role models.
我要是有好的榜樣就好了。
If only I had shown myself strong in the face of temptation!
面對誘惑的時候，我要是更堅定一點就好了。

句型3：
I should have done sth.
我本應該做...
It was a great party last night. You should have come. Why didn't you?
昨天的聚會很棒。你沒有，如果你來了你會很開心的。
I should have told you so.
我應該告訴你的。
I should have got a better price for the house, but I'm not much of a businessman.
那個房子我本來應該賣個更好的價錢的，但是我不大會做生意。

句型4：
I regret sth/doing sth.
我為某件事，感到后悔。
I bitterly regretted ever having mentioned it.
我非常后悔提起了那件事。
I deeply regret what I said.
我非常后悔我說了那些話。
I've had a wonderful life. I don't regret a thing.
我這一輩子都生活得很好，我沒有什么遺憾。