I am writing to extend my sincere gratitude for __________________(感谢的原因). If it had not been for your assistance in __________________(对方给你的具体帮助), I fear that I would have been___________________(没有对方帮助时的后果).
No one would disagree that it was you who___________________(给出细节).
Again, I would like to express my warm thanks to you! Please accept my gratitude. Best wishes.
I would like to take this opportunity to express my heartfelt gratitude to you for your help when I was in difficulty. You have been very kind and helpful since we knew each other.
Last week, I caught a bad cold and had to stay at home for a week. When I was worrying about the lessons, you came to my home after school and helped me with every subject. With your help, I didn’t fall behind others.
Again, thanks so much for your enthusiastic help. Even though you are to about to go abroad for further education I know that I will always stay in touch with you. I wish you every success in the future and I hope we can exchange more viewpoints on study.
Please keep in touch, and drop in and visit us whenever you are in this part of the world.
I am writing to you to express my thanks for your help in learning English. You are one of the best teachers who I have ever met. There are many good points that I learn from you.
During these days in your class, I have acquired much knowledge from you and it really helps me a lot. Firstly, you let me know what the west thinking pattern is —straight thinking pattern. As an English learner, it is important for me to understand the difference between them. There is no denying the fact that this can help me with my examination and interaction with foreigners. What's more, I'm glad to be your student, and I am very happy to learn the course under your guidance. English is an important tool, through which we can share our experience with the world. I treasure the chance of learning English, and I enjoy the happiness from your course.
The last not the least, please forgive those mistakes I have made which may upset you. What I have learned from you will help me pass the coming examinations and also be useful for my further education in abroad. It is not only a progress of learning, but also a cultivation of my ability.
May everything go well around you.