我想写一封感谢；老师的英文信内容如下：感谢你两年来的照顾,尽管知道你不当我们班主任之后我确实有过退学的想法,但是现在我想通啦,你当不当我们班主任已无所谓,重要的是看我们自己的态度.你放心,我绝对会尽我最大的努力去考上大学,不会辜负了你对我们的期望.在加一句：祝在新的岗位上一帆风顺.

Dear teacher,
Thanks for your guidance during these two years,I want to discontinue my schooling as you were not the teacher in charge of our class,but now I clear up my mind,whether you were the teacher in charge of our class is not so important,It is depended on the attitude of ourselves.
please be ease,i will try my best to have a college life.i won't let you down.
May you have favorable winds in your sails!
额.有些词,"想通"之类的翻译的不是很准确,多少老师肯定懂.嘎嘎