外销员外贸外语：贸易函电书写规则语言要有礼且虚心，准时地回信也是礼貌的表现 例如： We have received with many thanks your letter of 20 May, and we take the pleasure of sending you our latest catalog. We wish to draw your attention to a special offer which we have made in it. You will be particularly interested in a special offer on page 5 of the latest catalog enclosed, which you requested in your letter of 20 May. 二、Consideration 体谅 写信时要到处从对方的角度去考虑有什么需求，而不是从自身动身，语气上更敬重对方。
例如： “You earn 2 percent discount when you pay cash. We will send you the brochure next month. ”就比 “We allow 2 percent discount for cash payment. We won’t be able to send you the brochure this month.” 要好 三、Completeness 完整 一封商业信函应概况了各项必需的事项，如邀请信应说明时间、地点等，确忌寄出模糊不清的信件 四、Clarity 清晰 意思表达明确，要留意： (一)避开用词错误： 例如：As to the steamers sailing from Hong Kong to San Francisco, we have bimonthly direct services. 此处bimonthly有歧义：可以是twice a month 或者once two month.故读信者就迷惑了，可以改写为： 1.We have two direct sailings every month from Hong Kong to San Francisco. 2.We have semimonthly direct sailing from Hong Kong to San Francisco. 3.We have a direct sailing from Hong Kong to San Francisco. (二)留意词语所放的位置： 例如： 1. We shall be able to supply 10 cases of the item only. 2. We shall be able to supply 10 cases only of the item. 前者则有两种商品以上的含义。
(三)留意句子的构造： 例如： 1.We sent you 5 samples yesterday of the goods which you requested in your letter of May 20 by air. 2.We sent you, by air, 5 samples of the goods which you requested in your letter of May 20. 五、Conciseness 简洁 (一)避开废话连篇： 例如： 1.We wish to acknowledge receipt of your letter...可改为：We appreciate your letter... 2.Enclosed herewith please find two copies of...可改为: We enclose two copies of... (二)避开不必要的重复： (三)短句、 单词 的运用： Enclosed herewith----->enclosed at this time----->now due to the fact that----->because a draft in the amount of $1000----->a draft for $1000 六、Concreteness 详细 七、Correctness 正确。