以下是关于晋升后如何感谢老板的英文表述：

Dear Boss,

I am writing this letter to express my deepest gratitude for the recent promotion. I am truly honored and humbled by this opportunity. I want to thank you for your trust and confidence in my abilities. Your support and guidance have been instrumental in my growth within the company. You have always provided valuable feedback and encouragement, which has pushed me to strive for excellence. I also appreciate the faith you have placed in me to take on this new role and the challenges that come with it. I am committed to working even harder to justify your decision and to contribute to the continued success of our team and the organization as a whole. Once again, thank you for this promotion. I look forward to continuing to work under your leadership and making significant contributions to our shared goals. Best regards, [Your Name] In addition, during a face-to-face conversation, you could say something like: \Boss, I'm so grateful for the promotion. I couldn't have done it without your support and mentorship. I'm really excited for this new chapter and will do my best to exceed your expectations.\