在日常的学习和工作中，我们常常会收到别人的帮助、关心和支持。为了表达我们的感谢之情，写一封感谢信是一种非常有效的方式。以下是10篇不同场景下的英语感谢信范文，每篇均控制在100字左右，希望对你有所帮助。

感谢信范文一：老师

Dear Mr. Smith,

I am writing to express my sincere gratitude for your guidance throughout the semester. Your support and encouragement helped me achieve great progress in my studies. I appreciate all the time and effort you have devoted to us. Thank you so much!

Sincerely,
[Your Name]

感谢信范文二：朋友

Dear [Friend's Name],

I want to thank you from the bottom of my heart for being there for me during the difficult times. Your unwavering support and friendship mean the world to me. I am grateful to have you as a friend.

Warm regards,
[Your Name]

感谢信范文三：家人

Dear Mom and Dad,

Thank you so much for everything you have done for me. Your love and sacrifices have made me who I am today. I promise to make you proud. Love you both dearly.

With love,
[Your Name]

感谢信范文四：同事

Dear [Colleague's Name],

Thanks for your help with the recent project. Your expertise and hard work were instrumental in our success. It was a pleasure working with you. Looking forward to future collaborations.

Best regards,
[Your Name]

感谢信范文五：医生

Dear Dr. [Name],

I deeply appreciate the care and attention you provided during my treatment. Your professionalism and kindness made a significant impact on my recovery. Thank you very much for everything.

Sincerely,
[Your Name]

感谢信范文六：客户

Dear [Client's Name],

Thank you for choosing our services. We are honored to have had the opportunity to assist you. We look forward to serving you again soon. Have a wonderful day!

Best wishes,
[Your Name]

感谢信范文七：志愿者

Dear [Volunteer's Name],

I want to thank you for dedicating your time and effort to volunteer work. Your commitment and passion are truly inspiring. You are making a difference in so many lives. Thank you!

Kind regards,
[Your Name]

感谢信范文八：老板

Dear [Boss's Name],

I am grateful for the opportunities and support that you have given me. Your leadership has greatly influenced my professional growth. Thank you for being such an amazing boss.

Respectfully,
[Your Name]

感谢信范文九：房东

Dear [Landlord's Name],

Thank you for providing me with a comfortable place to live. Your generosity and understanding have made my stay here pleasant. I appreciate your hospitality.

Warmest regards,
[Your Name]

感谢信范文十：导师

Dear [Mentor's Name],

Your advice and mentorship have been invaluable to me. Your guidance has helped shape my career path positively. I cannot thank you enough for being such a great mentor.

Gratefully,
[Your Name]