一个中心：
以完成任务为中心。题目中所有的细节必须涉及，所有的问题必须回答。
两个基本点：
第一、在考试中，无论遇到哪种类型的书信又或是题目中有任何的具体要求，都要谨记下列的三要素：
1. 明确的指出自己写信的目的
2. 清晰、准确的陈述事实
3. 使用坚定但礼貌的语言(这一点与概述中提及的内容一致)
在整章中，我会强调每一种类型书信的目的：
如果你写信是要投诉，就用一句话把问题概括，比如：我买的产品不好用;修理工作不彻底;食物太难吃;新租的房子家具太旧等等
如果你写信寻求帮助，那就清楚的告诉收信人你遇到了什么困难，你需要哪些具体方面的帮助等
如果你写求职信，那就说明白为什么你比别人强
总之，一封有着明确目的的信，就像是承载着期望的生命。
下面有三封短信，看看它们都带着什么样的目的(雅思考试中最常见类型)
NB (提示): 这些书信仅用于了解上述3要素的重要性，但表达地道、文字精准，值得学习;但是正式考试中，除了需要书信的内容，还要提供称谓和落款等内容。
书信一、写信目的：
道歉信 (承认错误、表示歉意、请求原谅、寻求解决方案)
Im so sorry I missed our appointment for this morning; I got held up in a faculty meeting and could not break away.
Please call me to reschedule. I am available any weekday except Friday from 2 to 4 P.M., and because I missed our meeting I also am willing to drop by the office any time Saturday if that works better for you.
My apologies.
书信二、写信目的：
抱怨信(描述现象、陈述理由、提出解决)
I have just moved into Apartment 32B, and am enjoying my stay here. However, I do have a concern about one of my neighbors.
When I signed my lease it was emphasized to me that there could be no more than two persons living full-time in a studio apartment. That is definitely not the case in the apartment directly above mine, 33B.
During the one month I have been here, there must have been at least six adults and three young children somehow squeezed into that studio apartment at any one time. The constant noise, the traffic into and out of the apartment, and the four cars they use is very annoying.
Please look into the matter and advise me of the resolution as soon as possible.