求一封500字的英文信

Mr Liu :
　　You have taught us for almost two years. Remember that on one occasion, you just taught our class a few days, I have not used in class do not always answer questions, always a person sitting quietly on their own position. It is you I do not quite understand it, I am grateful for this and the way Xin in a group of well-being, she is also learning better than I do, so you let her head as our language.Later, I and Lu Zhixin, not a group, we have mutual understanding, and I also in the classroom are not so, so, you let me serve as the language of our group leader. It is your language so that I had become a leader, it makes me feel that you at least I am confident that you, believe me. This is also my own full of confidence, academic performance has improved a lot.
　　Mr Liu ，I would also like to thank you, thank you for your years of cultivation of us, gives us knowledge, put your mind to impart knowledge to us all, let us these flowers of the motherland, in your car