自然
商業書信的寫作必須力求“自然”，不能滿篇都是過時的商業行話。例子：
使用過時商業行話的句子 自然的句子
In compliance with the afore-mentioned agreement, dispatch of goods will be undertaken subsequent to receipt of said monies. . As agreed, we shall forward the goods to you when we have received your cheque.
We should be obliged if you
could contact our Mrs Xiao at an
early date. . Please contact Mrs Xiao
soon.
We beg to inform you that we are herewith canceling our order for
the same. . I am afraid we are
canceling our order for the
above goods.
Assuring you of our best attention at
all times, and awaiting the favour of your early response. . I look forward to hearing
from you soon.
Due to the fact that your contract has lapsed, we are unable to comply with your request. . As your contract contract has lapsed we cannot do as you request.
2016年BEC商務英語初級寫作要求：可讀性強
商業書信要求可讀性強。
爲了使信讀起來生動有趣，寫信人應該儘量避免使用單調的語言，力求使語言結構富於變化。可使用的方法有：
1. 變化文法結構
變換句子的文法結構也可提高信文的可讀性。寫信時不要千篇一律地使用同一種表達方法。例如，下面這個句子可以用多種方法改寫
2.增強書信的'可讀性，還應注意運用精練的語言
商業書信必須語言精練，能用一個單詞的地方儘量不要使用多個單詞。例如：
高冗餘度語言
低冗餘度語言
Inasmuch as we require active consideration prior to making a decision, I am afraid that, in the circumstances, you will have to wait.
As we need to consider before making a decision, I am afraid you will have to wait.
2016年BEC商務英語初級寫作要求：積極的語氣
下面左邊的三個句子採用提“中性”的語氣，而右邊相應的句子語氣則顯得積極。這種積極的語氣可以使一個句子聽上去更有誠意。
中性 積極
I am in receipt of your order for 250 pairs of Niky ‘Conga’ sports shoes. . Thank you for your recent order for 250 pairs of Niky ‘Conga’ sports shoes.
You failed to send your order to us before the new prices were introduced. . Unfortunately, we did not receive your order before the new prices were introduced.
We cannot devote much time to your visit as the March Sales figures are being compiled and we are very busy. . We shall devote as much time to your visit as our hectic schedule will permit.