以下是英语道歉信的模板及写作要点，综合多个权威来源整理而成：

一、道歉信基本结构

1. 开头

   • 表达歉意：使用"Dear [姓名],"或"Dear Sir/Madam,"等正式称呼。

   • 说明事由：简洁明了地说明道歉原因（如迟到、失物、错误等）。

2. 正文

   • 说明具体情况：详细描述导致道歉的事件经过（如时间、地点、原因等）。

   • 表达悔意：使用"terribly sorry," "I regret," "I feel awful about it,"等表达。

   • 避免推诿：承认错误，避免使用"it's not my fault"等逃避性语言。

3. 结尾

   • 提出补救措施：说明如何避免类似问题再次发生（如赔偿、补偿、改进计划等）。

   • 请求原谅：使用"please forgive me," "I hope you can understand,"等表达。

   • 结束语：使用"Yours sincerely," "Sincerely,"等正式结束语。

二、常用表达与句型

• 道歉核心句型

  • "I apologize to you for [错误/失礼行为] because [原因]."

  • "I regret that I [未能完成/造成不便] on [具体日期]."

  • "I take full responsibility for [问题发生] and will remedy it as soon as possible."

• 表达悔意与歉意

  • "I feel awful about it and want you to know what happened that..."

  • "This is a warning to me to be more careful in the future."

  • "I sincerely hope you can understand my处境"

• 请求原谅

  • "Can you forgive me for this mistake？"

  • "I will do everything to make it up to you"

三、注意事项

1. 避免模糊表达 ：明确说明时间、地点和具体行为，避免含糊其辞。

2. 及时沟通 ：问题发生后尽早道歉，避免拖延。

3. 态度诚恳 ：使用"terribly sorry," "sincerely,"等词汇传递真诚态度。

四、示例参考

模板一 （考试错过）

"Dear Mr. Smith,

I am indeed very sorry that I missed the examination on International Business English Writing you gave last Friday. I feel awful about it and want you to know what happened that day...

Sincerely,

[Your Name]"

模板二 （失物未归）

"Dear David,

I’m writing to express my sincerely apologies for losing the book you lent to me. I took it to the library yesterday but couldn’t find it. I searched everywhere but to no avail...

Please forgive me for this mistake, and I will buy a new one to replace it.

Yours truly,

Tom"

通过以上模板和要点，可根据具体情境调整内容，确保道歉信既表达歉意又体现责任感。