dear teacher ,
　　　　i am writing to you to express my thanks for your help in learning english and speaking english.
　　　　during these days in your class, i have learned much from you and it is very helpful to me. firstly, you let me know what is the west thinking pattern—straight thinking pattern. and, i think, it is very important to understand the west’s thoughts. as you know, this can help me with my examination and interaction with foreigners. secondly, i have got enough confidence in speaking in english from your class and it took  me a long time to gain this confidence. now, i always  express my ideas in english as possible as i can. it’s great to do that. the last not the least, i find that learning english is not an boring thing as before  and i’m interested in studying english which was just a necessary task to pass examinations. reading, listening or speaking all become interesting and i really enjoy it.
　　　　above all, i want to say thanks again to you. and thank you for your time.
　　　　good luck！