在高中生活中，我们经常需要用英语写作文。下面我将为您提供一篇关于写感谢信的范文，希望能帮助您更好地掌握这一技能。
Dear Mr. Smith,
I am writing to express my gratitude for your kind help in the past semester. Your encouragement and support have made a significant difference in my academic life. I appreciate the time you spent explaining difficult concepts and providing valuable feedback on my assignments. Your dedication to teaching is truly inspiring, and I am lucky to have such an excellent teacher. Thank you once again for everything, and I look forward to continuing our great work together next semester.
Best regards,
[Your Name]