在英语作文的写作中常常会遇到一些表示感谢的句子，有比较口语化的比如：Thanks for doing sth for me

Thank you for your hlep

下面我们来看看一些比较常用的正式的句型

thank-gratitude-grateful-appreciate 的多种变体 　　
　　
1、I’m most grateful to you for your…
　　
2、I’m writing this letter to express my sincere gratitude for…
　　
3、I would like to convey in this letter my heartfelt thanks for…
　　
4、I feel greatly indebted to you for…
　　
5、I’m writing to tell you how greatly I appreciate all you have done for me…
　　
6、But for your kind assistance, I would have …
　　
7、I must thank you again for your generous help.
　　
8、Please accept my deepest gratitude.