1.審清題目，瞭解這是什麼文體，是個人信函還是公務信函，要看清楚要求。
2.思考稱謂應該怎麼寫。
Dear …, (個人信函)
Dear Sir/Madam,(公務信函)
3.分為三段
第一段：寫信目的`
第二段：具體內容
第三段：表示感謝(或者歉意)
4.思考落款該怎麼寫。
Sincerely yours,
XXXXXX
英語四級信件作文必殺句：
(一) 自我介紹
注：如果公務信函需要自我介紹，因為對方不認識寫信人;如果是私人信函不需要自我介紹。
I am a university student majoring in environmental science.
(二)寫信目的：
1.I am writing this letter for the purpose of resigning from the current post/position.
2.I am writing to inform you that I wish to request if you could find a potential beneficiary of Project Hope.
3.I am writing this letter of my intention of withdrawing from my current position.
4.I am writing this letter in order to express my sincere gratitude to you.
(三)表示感謝：
appreciation for you to your generous help is beyond words.
s fail me when I wish to express/show my sincere gratitude to you. (感激之情，溢於言表)
3.I take this opportunity to extend my heartfelt appreciation to the kind aid/assistance/help you give/offer/render me.
k you for your kindness/consideration.
(四)期待回覆：
1.I look forward to hearing from you soon.
2.I am looking forward to your favorable reply at your earliest convenience.
prompt attention to my inquiry would be highly appreciated.
(五)表示歉意：
1.I apologize (in advance) for any trouble/inconvenience I will bring to you.
2.I apologize for any inconvenience I have brought to you
3.I am sorry for any trouble I might bring to you.
附加：
Should you have any question, please contact me at the e-mail provided below: .
如果你有任何問題，請聯絡以下郵箱。
例題1：
Write a letter to a friend of yours to recommend one of your favorite books and give your reasons for your recommendation.
Dear Frank,
I am writing this letter for the purpose of recommending one of my favorite book series to you, Harry Potter. This book series consist of seven books and they are all amazingly intriguing to readers.
The reasons for my recommendations are as follows. To being with, the book series tell a story of adventure about Harry potter and his friends fighting against the Dark Lord. It intends to tell us that love is powerful. Harry Potter is invincible because his mother Lily tried to save him by sacr
