以下是一些表達感激之情的英語佳句：
1. I am deeply grateful for your help.
2. Words cannot express my gratitude.
3. Thank you for being there when I needed you.
4. I am indebted to you forever.
5. You have no idea how much I appreciate what you have done.
6. I would be lost without you.
7. I owe you a big debt of gratitude.
8. Thank you for everything you have done for me.
9. I will always be grateful for your kindness and support.
10. You have made a difference in my life and I will never forget it.
希望這些佳句能夠表達你的感激之情。