感谢信是对收信人的某一行为表示感谢。
写作策略：
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感谢信还有浓厚的感情色彩，具有比较浓的人情味，因此可操作性不是太强。考生即便学习了一篇范文，但对另外一道此类题目也是可能不知该从何处入手。实际上感谢信(还包括表扬信)从内容上恰恰与投诉信相反，因此可以直接套用投诉信的写法，只需将投诉信主体段落对投诉理由的具体说明改为对感谢或表扬理由的具体说明即可。例如，一道题目说代我在一个旅馆信了一段时间，但方方面面都不尽如人意，回家后你和家人都闹肚子，请你写一封投诉信。而另外一道题则是说你在一家旅馆住了一段时间，在那里度过了一段美好的时光，请你写一封感谢信。这两封信在主体段落上都可以从几个方面对该旅馆进行投诉或感谢，都可以从服务、饮食卫生、客房环境等几个方面来说明投诉或感谢的理由，只需将投诉信的不满改为感谢信的满意即可。由此可知，只要掌握了投诉信的写法，感谢信也应当是手到擒来。
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 don't 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 word's description.
i feel most obliged to thank you once more.
please accept my gratitude, now and always.
★例：
directions:
after being involved in an accident, you were looked after by another person. write a letter:
1) mentioning what happened in the accident,
2) telling the person about your recovery, and
3) expressing your thanks.
you should write with no less than 100 words on answer sheet 2. do not sign your own name at the end of the letter. use "li ming" instead. you do not need to write the address.
范文：
dear john,
i am writing to thank you for looking after me after that unfortunate accident the other day, when i was knocked off my bike by a taxi. if it had not been for your assistance in giving me first aid and taking me to a nearby hospital, i fear that the consequences might have been much more serious.
the doctor says that my broken leg is healing well. in addition, the taxi company has agreed to pay my hospital bills. everyone agrees that it was your quick-witted response in that emergency that has led to this satisfactory outcome.
although nowadays many people talk about the need to be unselfish and to help others, we see very few people practicing what they preach. but you showed by your actions that you are an exception.
yours sincerely,
li ming