英文中表示感謝老師的句子有很多種，例如：
You have been a qualified teacher and an even better friend. Thank you for all that you have done. 您不僅是一位合格的教師，更是一位好朋友，謝謝您所做的一切。
You are not only a good teacher but also our close friend. Thank you for helping us make something of our lives. 您不僅是一位好老師，也是我們親密的朋友，謝謝您幫助我們奮發有為。
You are like a third parent. We all love you and respect you. 您就象我們的家長，我們都敬愛您。
We wish to show our gratitude and thanks with a small gift. Happy Teacher』s Day! 我們送您一件小禮物，以表我們對您的感激之情。教師節愉快！
We are more thankful than we can express. 對您的謝意，我們無法用語言來表達。
This small gift is only a tiny token of our gratefulness. We all want to thank you. 這件小小的禮物略表我們的感激之情。我們大家都很感謝您。
The whole secret of the teacher』s force lies in the conviction that men are convertible. 教師力量的全部秘密，就在於深信人是可以改變的。
以上句子涵蓋了從簡單的感謝到更深層次的感激之情，可以根據具體情況選擇適合的表達方式。