"Thank you, teacher" 的英语表达是 "Thank you, teacher".
来源：这是一个固定的礼貌用语，表示对老师对学生的帮助和指导的感激。
例句：
Thank you, teacher, for all your help this semester.
(谢谢老师，这个学期您的帮助。)
I just wanted to say thank you, teacher, for all the support you've given me.
(我只是想说，谢谢老师，谢谢您给我的所有支持。)
Thank you, teacher, for being an inspiration to me.
(谢谢老师，因为您是我的灵感来源。)