四级写作中，书信类作文虽然不如议论文频率高，但几乎每年都会出现一次。一旦考到，格式错误就是“致命伤”——格式不对，直接降档扣分。下面从格式规范、称呼与结束语、各类型书信模板、常用句型四个方面，帮你一次性掌握书信类作文的写法。

一、书信格式规范（写错直接扣分）

四级书信采用齐头式（所有内容左对齐），不缩进、不居右。标准格式如下：

```
Dear Sir or Madam, （称呼顶格，后面跟逗号，不加冒号）

（空一行）
I am writing to... （正文第一段，顶格写）
...
（空一行）
I look forward to your reply. （结束语）
（空一行）
Yours sincerely, （结束敬语，顶格写）
Li Ming （签名，顶格写，不写日期）
```

格式要点速查：

| 要素 | 正确写法 | 常见错误 |
|------|---------|---------|
| 称呼 | 顶格，后面加逗号 | 加冒号、顶格但有空格、称呼错误 |
| 段落 | 每段顶格写，段间空一行 | 首行缩进2字符、段间不空行 |
| 结束敬语 | Yours sincerely, / Yours faithfully, | 首字母不大写、拼写错误 |
| 签名 | Li Ming / Zhang Wei | 写自己真实姓名、忘写签名 |

称呼选择规则：

• 知道对方姓名：`Dear Mr. Smith,` / `Dear Ms. Johnson,`
• 不知道对方姓名（正式）：`Dear Sir or Madam,`
• 写给朋友/熟人：`Dear John,`

结束敬语选择规则：

• 知道对方姓名：`Yours sincerely,`
• 不知道对方姓名：`Yours faithfully,`
• 朋友/熟人：`Yours,` / `Best regards,`

二、书信五步结构

任何书信都可以按这五步组织：

| 步骤 | 内容 | 作用 |
|------|------|------|
| ① 称呼 | Dear Sir or Madam, | 明确收信人 |
| ② 开门见山 | 写作目的（1句话） | 让收信人立刻知道来信意图 |
| ③ 具体内容 | 2-3段，每段一个核心点 | 详细说明 |
| ④ 礼貌结束 | 表达期待或感谢 | 表示礼貌 |
| ⑤ 签名 | Yours sincerely, + 姓名 | 完成书信 |

三、常见书信类型及全文模板

类型1：建议信（考频最高）

出题角度：给朋友/老师/校报提建议。答案结构：肯定优点 + 具体建议（2-3条）+ 礼貌结尾。

全文模板：

```
Dear Editor,

I am a regular reader of your newspaper, and I am writing to put forward some practical suggestions concerning the content of the campus section.

First and foremost, it would be beneficial to include more reports on student activities and achievements. This can encourage more students to participate in campus life. Secondly, I suggest adding a column on career planning, as many students are anxious about their future job prospects. Last but not least, a weekly book or movie recommendation would greatly enrich the reading experience.

I hope these suggestions will be of great help to you. Thank you for your time and consideration.

Yours sincerely,
Li Ming
```

建议信核心句型：

• 写作目的：`I am writing to put forward some suggestions concerning...`
• 提出建议：`It would be beneficial to...` / `I suggest that...` / `Another suggestion is that...`
• 礼貌结尾：`I hope these suggestions will be of great help.`

类型2：感谢信

全文模板：

```
Dear Professor Wang,

I am writing to express my sincere gratitude for your guidance during my preparation for the English speech contest.

Without your patient instruction and valuable advice, I would not have been able to overcome my stage fright and improve my pronunciation. Your encouragement gave me the confidence to perform well on stage. Thanks to your help, I finally won the second prize.

Please accept my heartfelt thanks once again. I will always remember your kindness.

Yours sincerely,
Li Ming
```

感谢信核心句型：

• 写作目的：`I am writing to express my sincere gratitude for...`
• 表达感激：`Without your help, I would not have been able to...`
• 礼貌结尾：`Please accept my heartfelt thanks once again.`

类型3：邀请信

全文模板：

```
Dear Lucy,

I am writing to invite you to my birthday party, which will be held at my home on Saturday, May 20th, from 6:00 PM to 9:00 PM.

A few of our close friends will be there, and we plan to have dinner together, play some games, and watch a movie. It would be great if you could join us. If you need any help with directions, please feel free to let me know.

I do hope you can come. Looking forward to your reply.

Yours sincerely,
Li Ming
```

邀请信核心句型：

• 写作目的：`I am writing to invite you to...` / `It is my great pleasure to invite you to...`
• 提供细节：`The event will be held from... to... at...`
• 礼貌结尾：`I do hope you can come. / We would be honored to have you with us.`

类型4：投诉信

全文模板：

```
Dear Customer Service Manager,

I am writing to express my dissatisfaction with a product I purchased from your online store last week.

The product, a pair of headphones (order number 12345), arrived with a broken left earpiece. I contacted your customer service twice, but no solution has been offered so far. This has caused great inconvenience to me.

To resolve this issue, I would appreciate it if you could either replace the product with a new one or issue a full refund. I look forward to your prompt reply.

Yours sincerely,
Li Ming
```

投诉信核心句型：

• 写作目的：`I am writing to express my dissatisfaction with...`
• 描述问题：`The product arrived damaged / did not work as expected.`
• 提出诉求：`To resolve this issue, I would appreciate it if you could...`
• 礼貌结尾：`I look forward to your prompt reply.`

类型5：求职信/申请信

全文模板：

```
Dear Hiring Manager,

I am writing to apply for the position of summer intern, which I saw advertised on your company‘s website.

I am a sophomore majoring in Business English at XX University. My coursework includes marketing, cross-cultural communication, and business writing, which I believe are relevant to this position. In addition, I have served as the publicity director of the Student Union, where I developed strong organizational and teamwork skills.

I have attached my resume and would appreciate the opportunity to discuss my qualifications further. Thank you for your consideration.

Yours sincerely,
Li Ming
```

求职信核心句型：

• 写作目的：`I am writing to apply for the position of...`
• 介绍优势：`I believe my qualifications and experience make me a suitable candidate.`
• 礼貌结尾：`I would appreciate it if you could grant me an interview.`

四、考场实战流程（5分钟完成框架）

| 时间 | 任务 | 具体动作 |
|------|------|---------|
| 2分钟 | 审题+列提纲 | 判断书信类型（建议/感谢/邀请/投诉/求职），确定称呼、3个要点、结束语 |
| 2分钟 | 写开头+主体 | 写称呼和第一段（写作目的），主体段分2-3条列出 |
| 1分钟 | 写结尾+检查 | 写结束语和签名，快速检查格式、拼写 |

> 注意：书信作文要求120-180词，不要写得太短（<120词扣分）也不要太长（>180词不扣分但浪费时间）。

五、考前急救速查表

| 书信类型 | 写作目的句 | 核心句式 | 结尾句 |
|---------|-----------|---------|--------|
| 建议信 | I am writing to put forward suggestions concerning... | It would be beneficial to... / I suggest that... | I hope these suggestions will be helpful. |
| 感谢信 | I am writing to express my sincere gratitude for... | Without your help, I would not have been able to... | Please accept my heartfelt thanks. |
| 邀请信 | I am writing to invite you to... | The event will be held from... to... | I do hope you can come. |
| 投诉信 | I am writing to express my dissatisfaction with... | To resolve this issue, I would appreciate it if you could... | I look forward to your prompt reply. |
| 求职信 | I am writing to apply for the position of... | I believe my qualifications make me a suitable candidate. | I would appreciate it if you could grant me an interview. |

书信类作文的评分，格式占30%，内容占70%。格式正确是“及格线”，内容充实是“高分线”。考前花10分钟把上面5种模板各默写一遍，考场上遇到书信题，你就知道“第1段写什么、第2段分几点、第3段怎么结束”。掌握这套框架，书信作文就能稳拿80%以上的分数。