英语感谢信正文第一篇：英语感谢信 感谢信开头段常用句式和套话i am writing to extend my sincere gratitude for. i am writing to express my thanks for.i am writing to show my sincere appreciation for. i would like to convey in this letter my heartfelt thanks to you for.i feel deeply indebted to you and i really dont know how to thank you enough for your help.感谢信结尾段常用句式和套话i must thank you again for your generous help. i am most grateful for your selfless donation.my true gratitude is beyond the words de
