在学习英语的过程中，书信写作是一个非常重要的技能。对于高中生而言，掌握各种类型的书信格式和表达方式是非常必要的。本文将提供10篇不同类型的书信作文范文，以供参考学习。

一、感谢信

Dear Mr. Smith,

I am writing to express my gratitude for your help during my recent visit to London. Your guidance and warm hospitality made my trip a wonderful experience. Thank you!

Sincerely,
Li Hua

二、道歉信

Dear Professor Zhang,

I would like to apologize for missing the class last Friday. Due to an unexpected family emergency, I couldn’t inform you in advance. Please accept my sincere apologies.

Best regards,
Wang Li

三、邀请信

Dear John,

I hope this letter finds you well. I would like to invite you to my birthday party this Saturday at 6 pm. It would be great if you could join us. Looking forward to seeing you.

Warmest regards,
Chen Mei

四、申请信

Dear Admissions Officer,

I am writing to apply for admission to your university for the upcoming fall semester. I have attached my transcript and other necessary documents for your review. Thank you for considering my application.

Yours faithfully,
Li Wei

五、投诉信

Dear Sir/Madam,

I am writing to express my dissatisfaction with the quality of the goods I received last week. The items were not as described on your website. I request a full refund or replacement.

Sincerely,
Zhao Qiang

六、建议信

Dear Editor,

I am writing to suggest that our school should organize more extracurricular activities to enrich students’ campus life and improve their overall development. Thank you for considering my suggestion.

Respectfully,
Sun Yajie

七、求职信

Dear Hiring Manager,

I am writing to apply for the position of marketing assistant at your company. With a degree in Business Administration and relevant work experience, I believe I am well-suited for this role. Enclosed are my resume and cover letter.

Thank you for your time and consideration.

Yours truly,
Wu Xiaojun

八、询问信

Dear Ms. Wang,

I hope all is well with you. I am writing to inquire about the possibility of attending your lecture on environmental protection next month. Could you please provide me with more information?

Thank you very much.

Sincerely,
Li Ming

九、祝贺信

Dear Alice,

Congratulations on your recent promotion! I am thrilled to hear about your achievement. Your hard work and dedication have certainly paid off. Wishing you continued success in your new role.

Best wishes,
Tom Hanks

十、友情信

Dear Lucy,

It has been a long time since we last met. I just wanted to let you know that I am thinking of you and hoping everything is going well for you. Looking forward to catching up soon.

Take care and stay safe.

Affectionately,
Sophie Brown