感谢信
内容与
一.常用词汇

1.因(做)某事而感谢某人    thank sb. for (doing) sth. 
感谢信英文be thankful/grateful to sb for (doing) sth.
appreciate one’s doing …
2.表示感谢convey/express/extend my thanks/gratitude /appreciation(for)
3.多亏了 thanks to
4.回报 in return
5.为某人供应某物offer sb. sth.=offer sth. to sb. 
provide sb. with sth.=provide sth. for sb.
6.在做某事上取得巨大进步make much/great progress in doing sth.
7.热忱款待  warm reception and hospitality                       
8.时机做某事have chance to do sth.                                   
9.感觉像在家一样make sb. feel at home
10.有一个更深的理解  have a better understanding of                                                               
11.把某事归功于某人owe sth to sb
12.在某人的关心下with the
13.鼓舞某人做某事 do sth.
14.对某人重要mean a lot to sb.
15.激发了某人对...的热忱fuel one’s enthusiasm for
16.让某人重拾信念promote sb. to regain confidence.
17.难以言表beyond description/words
18.实现某人的幻想 fulfill ones dream
19.诚心地 from the bottom of ones heart
20.不知所措at a loss
21.遇到很大的麻烦 get into great trouble
22.别无选择只好做某事 have no choice but tio do sth.
23.给某人供应做某事的时机give sb. a chancer to do sth.
24.锦上添花 the icing on the cake
二、常用句式
首段
写信目的
1.I am writing to convey my sincere/heartful thanks/gratitude/appreciation to
2.Thank you from the bottom of my heart for.. 
3.I would like to take this opportunity to express my great appreciation for your timely support and assistance.
4.Many thanks for all the good things you have done in helping
5.From the bottom of my heart, I would like to convey my thanks to you for your help.
6.With the deepest gratitude, I am writing to you to express my heartfelt thanks to  
中间段
1.I am extremely thankful to you for your selfless help.
2.I made great progress with your kind help/Thanks to your selfless help, without which I couldn't have done sth.
3.There is no denying that it is difficult for me to do sth. without your help.
4.It was nice/kind/thoughtful of you to..
5.It was your kind help that …
6.If it had not been/Had it not been for your (help/guidance/ assistance), I wouldn’t =But for/Without your timely help, I wouldn't have done…
7.It was who/It was your professional/practical advice that enable me to do sth.
8.You are so kind and selfless that you have give me a great deal of constructive and instructive help /assistance to me.
9.It goes without saying that I have done sth. with your help.
10.Nothing will be able to erase our wonderful memories and we will remember them forever.
 
尾段
再次感谢
1.Many thanks for all the things that you have done for me.
2.Again,I would like to express my warm thanks to you! Please accept my gratitude.
3.It was kind of you to do this for me, and I appreciate it more than I can say.
4.Words fails to convey my endless appreciation to you in this letter/email, as you have done so much for me.
5.It is beyond my description to express my true gratitude for your unselfish help.
6.No words are strong enough to convey how grateful I am.
7.I feel deeply indebted to you and I really do not know how to thank you enough for your help.
8.Please accept my sincere thanks for your help, which I will never forget.
回报意愿
1.Thanks again and I hope that I will have the opportunity to return/repay your kindness.
2.Please do not hesitate to let me know if there is anything I could do to pay you back.
3.I will be more than pleased if I have the opportunity to repay your kindness. Again, I thank you for what you have done for me.
4.Please accept my sincere appreciation for your kindness and hopefully I will have the opportunity to return your charming hospitality.