How is everything going with you? I am writing to extend my heart-felt thanks to you for …(感谢)

　　Thank you for your letter of February 8 informing me that I have been accepted by your college. But I must apologize to you for… (道歉)

　　I am writing to inform you that 。.. (通知)

　　I am writing to seek your assistance in… to request to（请求）

　　I am writing to express my views on … (建议)

　　I am writing in response to your… (回应)

　　I am writing to apply for the scholarship that your department offers to students from other countries. （申请）

　　I am writing to see if it is possible for you to provide me with information regarding…（咨询）

　　I am writing to express my disappointment/dissatisfaction about … to complain about …(抱怨)

　　I am writing to lodge a claim for the suitcase I lost on my journey to … (挂失)

　　I have learned from…that you are looking for …。 And I am writing to recommend …for the post.(推荐)

　　补充句型：I am writing this letter for the purpose of doing sth. (较为正式)

　　2. 表达感谢的句型

　　I am most grateful to you for your…

　　I am writing this letter to express my sincere gratitude for…

　　I would like to convey in this letter my heartfelt thanks for…

　　I feel greatly indebted to you for …。

　　I am writing to tell you how greatly I appreciate all you have done for me.

　　But for your kind assistance, I would have …

　　I must thank you again for your generous help.

　　My thanks to you for you generous help are beyond words.

　　Please accept my deepest gratitude.

　　3. 表达道歉的句型

　　I feel really sorry to you for …

　　I must apologize to you for…

　　I would like to express my deepest apology/regret for not being able to …

　　Had I …， I would have…

　　I want you to know how badly I feel about…

　　4. 一般结尾

　　Any favorable consideration on my application/requests will be highly appreciated.

　　I am looking forward to your favorable reply at your earliest convenience.