例1中的两个单句具有明显的因果关系，但写作者并不使用表达因果关系的连接词如since，because，这种舍长句、复合句，选短句、简单句，喜并列、弃从属的句法特征在商务英语电子邮件写作中十分常见。例2中缩略语的使用，例3中不完整句的选择，反映了与普通商务信函相比，商务电子邮件更倾向于非正式文体，更为口语化。
③完整原则。
商务电子邮件的内容应力求具体、明确、完整，提供读者所需要的信息，尤其像报盘、询问贸易条件等需要回函的电子邮件，更需要清楚完整，因为只有包含具体信息的邮件，才能达到良好的沟通效果。邮件是否完整，可以用5W1H来检验，即who， when， where， what， why和how。
④清晰原则。
商务英语电子邮件的写作要做到层次清楚，用词准确。具体表现在：
A. 结构方面，尽量使用短段落。分段的格式使文章条理清晰，看起来更容易理解。必要时使用主题句，因为主题句的使用可以使邮件内容更加一目了然；否则，如果一篇较长的电子邮件通篇只有一个段落，即使用词简洁、准确，也会让读者产生厌倦，不愿读下去。
B.词汇方面，用词要肯定准确，切忌使用语义模糊、模棱两可的词或词组， 以免产生歧义， 造成误解，延误商务沟通和贸易。
例1.The figures show a significant increase.
例2.We will deliver your goods soon.
例1中“significant”一词意为“明显的、不小的”，语义模糊，故可以用具体数字替换。例2中“soon”表示“不久、很快”，语义不明确，没有指出具体的供货时间，可改为具体的年月日。
⑤礼貌原则。
商务英语电子邮件应遵循措词婉转、礼貌的原则。鉴于电子邮件直接影响整个交易的成败， 买卖双方应十分注意措辞方式， 要婉转、礼貌， 使对方容易接受。在写作电子邮件时，可以通过使用虚拟语气、委婉语气等方法迂回地表达观点，提出要求。
例1.If it is not for the larger orders we receive from a number of our regular customers， we could not have quoted for supplies even at that price.
例2.I would appreciate it if you could give me your best quotations for 65000 pieces.
例1中虚拟语气和例2中委婉语气的使用，缓和了商务谈判的语气，既明确了自己的立场，又使对方的面子免于受损，语气自然诚恳，礼貌得体，很容易被对方所接受。
三、推荐信
推荐信(recommendation letter)是写给招聘单位，向其推荐优秀人才的专用书信。有时也可以是向自己的熟人和朋友介绍某个人去做某件事的介绍信。推荐信一般具有推荐贤能和公私兼顾的特点。
推荐信有不同的种类，一般来讲，可以根据推荐信的投发对象以及推荐信的内容两个标准来分类。根据推荐信的投发对象可以分为“目标明确的推荐信”和“广泛性的推荐信”。所谓“目标明确的推荐信”，是指写信人明确自己推荐信的投发对象，所以根据对象的情况目标明确地行文的一种推荐信。而“广泛性的推荐信”，则指写信人只是推荐被推荐人的才能而暂无明确的推荐单位的一种推荐信。这种推荐信，往往可以同一内容一式多份，向同类性质的单位广泛投寄。根据推荐信的内容，可以分为“工作推荐信”和“求学推荐信”。“工作推荐信”，毫无疑问是指被推荐者希望到某一单位任职，从而要求推荐者所写的；而“求学推荐信”则往往是公司或是教授为某位职员或是学生求学深造而写的推荐信。
推荐信的结构对内容信息的传递非常重要，结构清晰的报告比结构混乱的报告更易于阅读，也能够更为准确地传递信息。推荐信的结构一般由三段组成，即前言部分、正文部分和结论部分。前言部分包括推荐人与被推荐人之间的关系；推荐人是在什么环境下认识被推荐人的以及两人的熟悉程度；被推荐人希望申请的学校和科系/单位和职位。主体部分包括推荐人对被推荐人的资格评估；推荐人初识被推荐人时，对他有何特别的印象；举例证实推荐人对被推荐人的评估结果。结论部分包括对被推荐人个人特质的评估(如沟通能力、成熟度、抱负、领导能力、团队工作能力以及品行等)，或需要改进的地方；推荐人对申请人的整体评估；评估被推荐人完成学业以后，在个人和专业上未来的发展；被推荐人可为该职位所做的创造性工作和所带来的业绩；被推荐人会为这个科系及团体带来的贡献。
中国人以前在找工作时很少用雇主推荐信的办法来证明本人的履历，但是随着世界一体化和全球化的发展，越来越多的人意识到推荐信的重要性。从法律上来说，推荐信(或称“工作证明信”)都是证据性的法律文件，是用来证明申请人的职业或学业，以及是否具备与申请人的职业或学业相关的工作经验。
首先，以找工作为主要目的的推荐信必须要包括如下三个部分，缺一不可：申请人的职业，申请人在本单位所完成的具体项目或所参与的具体工作的内容，以及申请人在完成这些项目时所使用的专业技能。
其次，以求学为主要目的的推荐信则必须包括申请人所申请的学校和专业、申请人在校期间的成绩、申请人的语言能力和性格特征以及申请人在该专业的潜力四个方面。
范文1求学推荐信--由学校教授推荐
这是一封教授推荐信，申请人梁海燕是北京大学的一名经济管理专业的学生，准备申请海外的MBA课程，请分析该信的结构、措辞以及格式。
Dear Admissions Committee，
In the capacity of professor at the Department of Economic who has instructed Miss Liang Haiyan in the course of International Marketing and Strategic Management during the academic year of 2005 to 2006. I am pleased to have this opportunity to introduce her to your prestigious MBA establishment. Among all the students who have received my instruction at Peking University， Miss Liang is one of the few who stood out and left me a positive impression. Therefore， I am confident to recommend this young lady to your prestigious MBA program.
Miss Liang is a bright and active individual who possesses a strong motivation to learn and excel in her course work. Unlike most of her peers who gain knowledge merely from school lecturing. Miss Liang would make great efforts and spend much time in reading articles and books beyond the course and share her ideas with the class. In addition， as an openminded individual who never lets go any learning chance. Miss Liang often came to me discussing various questions and problems she encountered in her coursework.
I would like hereby to draw upon an instance that I believe fully exemplifies Miss Liang"s academic ability. While attending my class she presented an excellent report focusing on the research of the European Union(EU)， in which she shared with us her careful observations on EU， and proposed a number of innovative suggestions for Chinese industries that wished to gain successful presence in that market. Having noticed her superior ability to conduct independent studies and to support her arguments with logical quantitative analyses， I suggested Miss Liang to submit her paper to the Accounting & Statistics Quarterly. Needless to say， Miss Liang has acquired very high marks in both of my courses.
The very positive impression made by Miss Liang has been repeatedly reenforced by her strong performance in various extracurricular activities. Miss Liang has managed to earn my confidence in her sound managerial potential by demonstrating intelligence， zeal， and leadership in both academic and extracurricular contexts.
In general， I consider Miss Liang a very promising applicant to your esteemed MBA program. I have the least reservation on her potential to succeed in her future educational as well as professional pursuit，and will be more than happy to discuss with you any matters pertaining to this reference letter.
Sincerely yours，
Anderson Will，
Ph.D.Professor
范文2求学推荐信--由工作单位推荐
这是由申请人工作单位为申请人出国进修所写的一封推荐信。整封推荐信分为四大部分，试分析：
July 6， 2007
To： UCLA
Attn： Chairman of Computer Graduate Institute
Dear Sirs，
It is my pleasure to recommend Miss Samantha Lee， a very able young lady with a strong sense of responsibility and great enthusiasm for helping others， for graduate study at your esteemed institution.
Miss Lee has worked as an Electronic Engineer at Computer Department of MANSEW International Inc．(MANSEW Group)， one of the leading companies here in Shenzhen doing trading and manufacturing in Electronic Components， Electronic Assemblies， Computers and Microprocessing Devices， for more than two years. During the period of her service in our company， she has exhibited an outstanding capacity for hard work and wholehearted devotion to her job such as setting up the automatic production line， testing instrument system， and computer management system， etc. As her superior， I appreciate very much her initiative and aspiration in duty performance and great help to our company.