I.英文书信写作的五项基本原则
这五项基本原则是：consideration, conciseness, clarity, courtesy, correctness。即：体贴、简明、清晰、礼貌、正确。
II.英文书信的结构
1. 信头(Heading)：包括写信人地址和写信日期。位置在信笺的右上角。地址从小到大，按单位换行，比如第一行写门牌号和街道，第二行写城市和省（州），第三行写国家和邮政编码。日期按照下列格式：June 1,2000(美国），1 June,2000（英国）。
2. 封内地址(Inside Address)：如果是比较正式的信函，信笺上还要写上对收信人的称呼和他的地址。它一般位于信头的下方，信笺的左边顶格的位置。
3.称呼(salutation)：封内地址低两行，靠左边顶格自成一行。如果是公函，则称呼对方的职位，如果是一般朋友则可称呼为My dear XX，如果是比较熟悉的朋友则可以用Dear XX。
4. 正文(The body)：有什么写什么即可。但注意五项基本原则。
5.结尾词和签名(Complmentary close and Signature)：一般信函的结尾词用Yours sincerely/truely/faithfully)。如果是公函则以Yours respectfully结尾为多。亲密一些的私人信件则可以根据情况以Yours ever/ affectionaely，love,等结尾。
结尾词下方要求手写签名，手写签名下方打印签名。
6. 附件和再启(Enclosure and Postscript)
如果有附件，则可以按照这样的格式写：Enclosure: XXX。如果有另外的事情需要补充，则可以用P.S.开头，表示“又启，又及”的意思。
7. 信封的格式(superscription)：写信人的姓名地址位于信封左上角（或信封背面中上方）。收信人的姓名地址位于信封中央或偏右。
8. 收转：在收信人姓名下方写上收转人的姓名，并在前面写上c/o字样。
二、邀请信范例
1、正式邀请
October 24, 1994
Dear Professor Qian:
I am pleased to inform you that the Culture Regeneration Research Society is organizing an academic exchange coference entitled " The Conflicts of Cilvilization and Cultural China" on 6-7 January 1995 in Cancouver, Canada.
You are cordially invited to participate in this important academic event of North America as our guest. Your round trip air ticket, accommodation and meal expenses will be subsidized. Should you be interested, please let us know at your earliest convenience.
Look forward to seeing you in this conference, and to having you as an important part of this event.
Sincerely,
(签名）
David Raymond
Chairman
Organising Committee of the Conference
Encl. Conference Announcement, Timetable, Member List
2、非正式邀请
Dear Mrs. Hudson:
Will you and Mr. Hudson be able to join us and a couple of friends on Saturday evening, October 5 th, for dinner? Later we plan to go to the City's Performance Hall to see a Huangmei opera.
Dinner starts at sitx-thirty to allow plenty of time for the drive into town and arrival before curtain time. We do hope you can come.
Sincerely yours,
Ma Mingcheng (签名）
生物谷网站 http://www.bioon.com
