后悔用英语怎么说？

用英语表达后悔可以如下:

• I regret (doing) it.

例句:I regret calling him last night.(我后悔昨晚给他打电话。)

• I wish (hadn't done) it.

例句:I wish I hadn't yelled at her.(我后悔吼她。)

• I feel (feel) about (doing) it.

例句:I feel bad about missing the meeting.(我后悔缺席那次会议。)

• I shouldn't have (done) it.

例句:I shouldn't have sold the stock so soon.(我不应该那么快出售那只股票。)

• If only I hadn't (done) it. 

例句:If only I hadn't clicked on that link.(如果我不该点开那个链接就好了。)

• I take (took) back what I (did).

例句:I take back what I said.(我收回我说的话。)

总的来说,表达后悔主要用两种方式:一是第一人称说"我后悔做某事",二是用条件语气和虚拟语气表达"如果当时不做这件事就好了"。语气上使用动词的过去式或情态动词,营造一种后悔的语气。