我想向我的老师表达我的感激之情。

I would like to acknowledge my debt to my teachers.

《牛津词典》

我真不知道如何表达我的感激之情。

Really, I hardly know how to express my gratitude.

youdao

我可以有上万种方式来表达我的感激。

I could say thank you a million different ways.

youdao