关于道谢、道歉和遗憾的英语交际用语，以下是综合整理的常用表达及使用场景：
一、道谢用语
基本表达 - Thank you!
- Thanks a lot! / Many thanks!
- Thanks for your help!
特殊场景
- It’s very kind/nice of you.
- I can never thank you enough.
- Thank you all the same.
二、道歉用语
基本表达
- I'm sorry.
- Please forgive me.
- I apologize for...
正式与非正式场合
- 发自内心：From the bottom of my heart
- 为不便致歉：I apologize for the inconvenience
- 避免重复错误：I won’t repeat that mistake
三、遗憾表达
基本表达
- Regrettable: The meeting was canceled.
- Pity: I can’t attend the event.
- It’s a shame: The movie was sold out.
搭配使用
- I regret to inform you...
- It’s a pity that...
- Unfortunately, we can’t...
四、实用句型
回应道歉： It’s okay. / That’s not your fault. 缓解尴尬
表达歉意：I’m terribly sorry for the trouble.
建议根据具体场景选择表达方式，正式场合优先使用完整句型，日常交流则可灵活运用缩略表达。注意搭配使用连接词（如"regrettably"修饰遗憾）可增强表达的连贯性。
