单元写作要求
本单元以“自然世界”为话题，主要谈论地球上丰富的生态系统。其书面表达命题形式主要是要求学生写一篇文章，呼吁大家保护环境。
写作方法策略
如何写与“保护环境”相关的文章
写这类文章时，首先要确定四要素——体裁、时态、人称、结构。正文开篇要开门见山，表明写作目的，引出保护环境这个话题；主体部分要基于题干要求进行详述，可以从重要性、环境危机以及具体措施这几个方面展开；最后发出呼吁，总结全文。
思路导引
佳作展示
高分词句
称呼
Dear Sir or Madam，
表明
I'm writing to ask for your help in protecting the
目的
forest.
详述
The forest ①is home to millions of species. It plays
内容
an important role in cleaning the air ②that we breathe
and acts like the “lung” of the earth. However, the
forest is facing serious problems. Tons of trees are cut
down, ③leading to soil erosion and habitat loss. To get rid
of these problems, we must take action. First, we can set up
local groups to plant trees regularly. Second, new laws
should be made to prevent people from cutting down trees
illegally. Third, ④it's also a good idea to raise people's
awareness of forest protection through colourful activities.
发出
I believe ⑤as long as we pull together, we can
呼吁
create a better planet. Join us to make a difference！
落款
Yours，
签名
Li Hua
①运用高级词组 be home to， play an important role，tons of，lead to，get rid of，take action，set up，make a difference。
②运用 that 引导定语从句修饰 air。
③运用现在分词短语作结果状语。
④运用 it 作形式主语，真正的主语是后面的动词不定式。
⑤运用 as long as 引导条件状语从句。

参考范文如下：
Dear Sir or Madam,
I'm writing to ask for your help in protecting the forest.
The forest is home to millions of species. It plays an important role in cleaning the air that we breathe and acts like the "lung" of the earth. However, the forest is facing serious problems. Tons of trees are cut down, leading to soil erosion and habitat loss. To get rid of these problems, we must take action. First, we can set up local groups to plant trees regularly. Second, new laws should be made to prevent people from cutting down trees illegally. Third, it's also a good idea to raise people's awareness of forest protection through colourful activities.
I believe as long as we pull together, we can create a better planet. Join us to make a difference!
Yours,
Li Hua

【分析】这是一篇以“呼吁保护环境（森林）”为主题的英语书信写作题，解题思路需遵循写作要求的四要素：体裁为书信、时态以一般现在时为主、人称结合第一人称与第二人称、结构为“开篇点明写作目的→主体阐述森林重要性、环境危机及保护措施→结尾发出呼吁”，同时要运用指定的高级词组和语法结构，确保内容贴合主题且表达地道。
【解析】本题要求写一篇呼吁保护环境的书信，参考范文严格遵循写作结构：开篇直接表明请求帮助保护森林的写作目的；主体部分先阐述森林的重要性（是数百万物种的家园、净化空气），再指出其面临的危机（大量树木被砍伐导致水土流失和栖息地丧失），最后提出具体保护措施（成立植树小组、制定相关法律、提高公众保护意识）；结尾发出呼吁并总结，同时运用了指定的高级词组（be home to、play an important role等）和语法结构（that引导的定语从句、现在分词作结果状语等），完全符合写作要求。
【答案】Dear Sir or Madam,
I'm writing to ask for your help in protecting the forest.
The forest is home to millions of species. It plays an important role in cleaning the air that we breathe and acts like the "lung" of the earth. However, the forest is facing serious problems. Tons of trees are cut down, leading to soil erosion and habitat loss. To get rid of these problems, we must take action. First, we can set up local groups to plant trees regularly. Second, new laws should be made to prevent people from cutting down trees illegally. Third, it's also a good idea to raise people's awareness of forest protection through colourful activities.
I believe as long as we pull together, we can create a better planet. Join us to make a difference!
Yours,
Li Hua
【知识点】英语书信写作、环境保护主题表达、英语语法应用
【点评】这篇范文结构清晰，逻辑严谨，准确运用指定的高级词汇和语法，完美契合“呼吁保护环境”的写作要求，是一篇优秀的单元写作范文。
【难度系数】0.5

话题写作积累
1. 保持……之间的平衡
2. 不受污染
3. 相当多
4. 给某人提供某物
5. 环保产品
6. 做志愿者
7. 森林里的植物可以吸收空气中的二氧化碳并释放人类需要的氧气。

8. 教育和知识是解决环境污染问题的有效工具。

9. 绿水青山就是金山银山。

1. keep the balance between ... and ...
2. free from pollution
3. quite a few
4. provide sb with sth/offer sb sth
5. environment-friendly products
6. work as a volunteer
7. Plants in the forest can take in carbon dioxide from the air and produce the oxygen that humans need.
8. Education and knowledge are useful tools for solving pollution problems.
9. Clear water and green mountains are as valuable as mountains of gold and silver.

【分析】
本题为环保话题相关的英语短语及句子翻译积累题，解题思路是根据每个中文表达的含义，匹配对应的英语固定搭配或标准句型，注意动词短语的正确形式、介词搭配以及定语从句等语法的正确使用，确保翻译符合英语表达习惯，贴合环保话题的常用表达。
【解析】
1. “保持……之间的平衡”对应固定短语keep the balance between ... and ...；
2. “不受污染”对应固定搭配free from pollution；
3. “相当多”对应常用表达quite a few；
4. “给某人提供某物”对应固定搭配provide sb with sth/offer sb sth；
5. “环保产品”对应environment-friendly products；
6. “做志愿者”对应work as a volunteer；
7. 句子翻译：“森林里的植物可以吸收空气中的二氧化碳并释放人类需要的氧气”译为Plants in the forest can take in carbon dioxide from the air and produce the oxygen that humans need；
8. “教育和知识是解决环境污染问题的有效工具”译为Education and knowledge are useful tools for solving pollution problems；
9. “绿水青山就是金山银山”译为Clear water and green mountains are as valuable as mountains of gold and silver。
【答案】
1. keep the balance between ... and ...
2. free from pollution
3. quite a few
4. provide sb with sth/offer sb sth
5. environment-friendly products
6. work as a volunteer
7. Plants in the forest can take in carbon dioxide from the air and produce the oxygen that humans need.
8. Education and knowledge are useful tools for solving pollution problems.
9. Clear water and green mountains are as valuable as mountains of gold and silver.
【知识点】
英语固定短语搭配、英语句子翻译、环保话题英语表达
【点评】
本题聚焦环保话题写作的核心词汇与句型积累，是英语写作的基础必备内容，需熟练掌握固定搭配和常用句式，提升写作的准确性与丰富度。
【难度系数】
0.8