Unit 7 The natural world（单元同步写作讲义）英语新教材译林版八年级上册

本讲义聚焦初中英语“人与自然”主题下生态系统保护倡议书写作，系统构建学习支架，涵盖话题核心词汇（如ecosystem, balance, pollution）、功能句式（开头点明目的、中间分析价值问题措施、结尾发出呼吁）、佳句仿写及范例谋篇布局（如“Protect Our Forests”典例的结构解析），并辅以话题解读图解。 该资料以生态保护为载体，融合语言能力（提供鲜活表达如“play an important role”“make a great difference”）、思维品质（通过审题分析与谋篇培养逻辑）和文化意识（树立环保理念）。课中素材积累与范例赏析辅助教师高效教学，课后8个实战任务（如旧物利用、家乡环保演讲等）助力学生迁移应用，查漏补缺。

Unit 7 The natural world单元同步写作讲义 单元写作要求：选择一种生态系统，发表相关倡议，呼吁人们保护该生态系统 本单元的主题属于“人与自然”范畴，涉及“生态保护、野生动物守护、自然环境维护”核心话题。 本单元旨在培养学生关注自然生态、认知海洋、湿地、森林三大核心生态系统的价值与作用，了解生态系统面临的各类破坏问题。通过学习单元阅读文本、对话素材与语法句式，掌握倡议书的写作框架与规范表达，能够条理清晰地介绍生态系统的重要性、现存问题及保护举措。这有助于提升学生的英语应用文写作能力、逻辑表达能力，同时树立爱护自然、守护地球生态的环保意识，实现语言学习与德育教育的结合。 词汇积累 1 / 1 学科网（北京）股份有限公司 1. ecosystem n. 生态系统 2. balance n. 平衡 3. surface n. 表面 4. oxygen n. 氧气 5. pollution n. 污染 6. flood n. 洪水 7. wildlife n. 野生动物 8. protect v. 保护；protection n. 保护 9. provide v. 提供 10. prevent v. 预防，阻止 11. store v. 储存 12. trap v. 吸收，困住 13. harmful adj. 有害的 14. environment n. 环境 15. nature reserve 自然保护区 16. living things 生物 17. get rid of 去除，清除 18. play an important role 发挥重要作用 句式积累 开头句（点明写作目的、引出话题） 1. I am writing today to ask all of you to protect our precious forest ecosystem. 我今天写信是呼吁大家保护珍贵的森林生态系统。 2. As we all know, wetlands are one of the most important ecosystems on the earth. 众所周知，湿地是地球上最重要的生态系统之一。 3. It is necessary for us to take action to save the ocean ecosystem right now. 我们立刻采取行动保护海洋生态系统刻不容缓。 中间句（介绍价值、阐述问题、提出措施） 1. Forests are the “lungs” of the earth and they help clean the air we breathe. 森林是地球之肺，帮助净化我们呼吸的空气。 2. However, many ecosystems are facing serious pollution and human damage now. 然而，如今许多生态系统正面临严重的污染和人类破坏。 3. We should not throw rubbish and we can plant more trees to protect forests. 我们不应乱扔垃圾，还可以植树造林保护森林。 4. Wetlands can store water and prevent floods during rainy seasons. 雨季时，湿地可以蓄水防洪。 结尾句（总结升华、发出呼吁） 1. Let’s work together to protect ecosystems and keep our earth healthy! 让我们共同保护生态系统，守护地球健康！ 2. Small actions can make a big difference to our natural environment. 微小的行动也能为自然环境带来巨大改变。 3. Protecting ecosystems is protecting ourselves. 保护生态系统，就是保护我们自己。 佳句仿写 1. 教材原句：Each ecosystem has a role to play and helps keep the balance of the environment. 每个生态系统都有其作用，有助于维持环境平衡。 仿写：每一片湿地都在保护野生动物、维持自然平衡方面发挥着重要作用。 _______________________________________________________ 【答案】Every wetland plays an important role in protecting wildlife and balancing nature. 2. 教材原句：Forests take in carbon dioxide and produce oxygen to clean the air. 森林吸收二氧化碳、释放氧气，净化空气。 仿写：海洋吸收大量二氧化碳，为生物提供氧气。 _______________________________________________________ 【答案】The ocean takes in lots of carbon dioxide and provides oxygen for living things. 3. 教材原句：It’s time for us to take action and protect the earth’s ecosystems. 是我们采取行动保护地球生态系统的时候了。 仿写：现在正是每个人行动起来，拯救濒危湿地的关键时刻。 _______________________________________________________ 【答案】It’s high time for everyone to do something to save our endangered wetlands. 典例 假如你是学校环保社团的成员，请你结合本单元所学知识，以 “Protect Our Forests” 为题，代表校环保社团，写一篇80-100词的英语倡议书，向全校同学呼吁保护森林。内容需包含：1. 森林的重要作用；2. 森林面临的主要问题；3. 我们的保护行动。 ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 审题 ① 题材：应用文（英文倡议书），体裁正式、语气诚恳，以呼吁倡议为核心； ② 人称：以第一人称we为主，兼顾第二人称you，贴合倡议语境； ③ 提示：内容必须涵盖森林价值、现存问题、保护措施三大要点，词数80-100，语句通顺、逻辑清晰，可使用本单元连接词与核心句型。 谋篇布局 开头 开门见山，点明森林的重要地位，引出保护森林的写作目的。 中间 分为两层，先介绍森林净化空气、守护生态的作用，再阐述乱砍滥伐、垃圾污染等问题，最后列举学生可践行的保护措施。 结尾 总结全文，发出倡议，呼吁大家共同守护森林生态系统。 佳作展示 Dear schoolmates, Forests are the “lungs” of the earth and one of the most important ecosystems. They take in carbon dioxide and produce oxygen to clean the air. Also, they are home to thousands of wildlife. However, forests are in danger now. People cut down too many trees and throw rubbish in forests, which damages the ecosystem badly. We must take action to protect them. We can stop wasting paper, plant more trees and tell others the importance of forest protection. Small efforts can make a great difference. Let’s work together to protect our forests! Yours sincerely, Eco-club 佳作赏析 亮点词汇： ① produce oxygen 制造氧气（单元核心短语，贴合生态话题） ② in danger 处于危险中（精准描述生态现状） ③ make a great difference 大有作用（高分万能结尾短语） 高分句型： ① 并列句型：They take in carbon dioxide and produce oxygen to clean the air.（运用单元重点并列结构，句式工整） ② 非限制性定语从句：People cut down too many trees and throw rubbish in forests, which damages the ecosystem badly.（升级句式，提升文章层次感） （一） 假设你是李华，你所在的学校正在开展“旧物新生”环保活动。请你用英语写一封倡议书，号召同学们积极参与旧物捐赠或交换活动。内容包括： 1.说明旧物闲置的问题和资源浪费现象； 2.提出处理旧物的建议（捐赠、交换、回收等）； 3.呼吁大家行动起来，保护环境。 要求：1.包含所有要点，可适当发挥； 2.语句通顺，语法正确，书写规范； 3.词数100词左右（开头已给出，不计入总词数）。    Dear fellow students,    Do you have old things that you no longer use? They may be books, clothes, or toys that just sit in your room collecting dust. ____________________________________________________________________________________________________________________________________________________________________________ Yours sincerely, Li Hua 【参考范文】： Dear fellow students, Do you have old things that you no longer use? They may be books, clothes, or toys that just sit in your room collecting dust. In fact, these items can still be useful to others.Throwing them away means wasting resources and polluting the environment. What can we do? First, we can donate them to people in need, such as poor families or charity organizations. Second, we can organize a yard sale or a swap meet to exchange items with friends. Third, we can recycle materials like paper, plastic, and metal. Let’s take action now! By giving old things a new life, we can reduce waste, save resources, and help others. A small act can make a big difference. Join us and do your part for the environment! Yours sincerely, Li Hua 【写作解析】 写作步骤 [第一步：审题立意] 确定文体：英文倡议书，以一般现在时为主 明确要点：①旧物闲置、资源浪费现象 ②旧物处理建议（捐赠、交换、回收）③号召大家行动、保护环境 确定人称：第一人称（I/we），面向同学使用第二人称you 注意事项：词数100左右 [第二步：构思布局] 三段式结构： 开头段：以闲置旧物引入，点明丢弃旧物会造成资源浪费、污染环境 主体段：列举捐赠、交换、回收三种处理旧物的可行方式 结尾段：呼吁同学们参与活动，点明旧物再利用的环保意义，升华主题 [第三步：要点展开] 要点一：说明旧物闲置与资源浪费的问题 闲置无用的旧物堆积落灰：old things that you no longer use/sit in your room collecting dust/lie unused at home/gather dust in corners 旧物依旧具备使用价值：can still be useful to others/have great value for others/serve other people well 丢弃旧物的负面影响：wasting resources and polluting the environment/create unnecessary waste/damage our living earth 要点二：提出旧物处理办法并发出环保呼吁 捐赠旧物帮扶他人：donate them to people in need/give away unused goods/send items to charity 举办活动互换旧物：organize a yard sale or a swap meet to exchange items with friends/hold old-goods sharing activities/trade second-hand things with classmates 回收纸张塑料等材料：recycle materials like paper, plastic, and metal/sort waste for recycling/reuse recyclable rubbish 号召大家即刻行动：take action now/start with small steps right away /join in the activity at once 旧物再利用的好处：reduce waste/save resources/help others/cut down rubbish/protect natural energy 呼吁共同为环保出力：a small act can make a big difference/do your part for the environment/every little effort counts/make contributions to green earth （二） 假定你是李华，你校英语演讲比赛在即，这次的主题是“Environmental Protection in My Hometown”，请根据以下图表内容提示，写一篇演讲稿，倡议大家保护家乡的环境。 Environmental Protection in My Hometown Problems the water pollution; … Solutions build waste water treatment plants (修建污水处理厂); … Improvement the water will be cleaner; … Hopes Everyone should… I hope my hometown will be… … 注意： 1. 写作词数为80左右； 2. 文中不能出现可能透露考生真实身份的任何信息。 ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【参考范文】 Environmental Protection in My Hometown Dear teachers and classmates, Good morning! Today my topic is Environmental Protection in My Hometown. Nowadays, my hometown faces some environmental problems, such as serious water pollution. To solve these issues, our government plans to build waste water treatment plants. With these measures, the water in our rivers will be much cleaner, and the environment will get better and better. Everyone should play a part in protecting our home. We can save water and reduce waste in daily life. I hope my hometown will become more beautiful and greener. Thank you! 【写作解析】 [第一步：审题立意] 确定文体：应用文 (演讲稿)，用一般现在时、一般将来时为主 明确要点：家乡环境问题、解决方案、改善效果、个人倡议、未来希望 确定人称：第一人称 (I/my/we) 注意事项：词数80左右，不得透露真实姓名与学校名称 [第二步：构思布局] 三段式结构： 开头段：问候+点明演讲主题 主体段：依次介绍环境问题、解决方案、改善效果 结尾段：发出环保倡议，呼吁大家行动；表达对家乡的美好期许 [第三步：要点展开] 要点一：环境问题 (Problems) 关键表达：the water pollution/the air pollution/the noise pollution等 要点二：解决方案 (Solutions) 措施选择：build waste water treatment plants/plant more trees/close down chemical factories/don’t pour dirty water into rivers等 要点三：改善效果 (Improvement) 效果描述：the water will be cleaner/the air will be fresher/the park will be greener等 要点四：倡议与希望 (Hopes) 个人倡议：should play a part in protecting our home/save water/reduce waste/plant more trees等 未来期许：I hope my hometown will become more beautiful and greener/There will be less pollution/People will be happier等。 （三） 请从下侧的图片中选择一种野生动物，并根据思维导图的提示，以校学生会的名义写一封英文倡议书，以便号召更多的同学加入保护野生动物的队伍。 注意事项： （1）倡议书须包括思维导图中的所有提示要点，要求语句通顺、意思连贯； （2）思维导图中的省略号部分应作适当发挥； （3）词数80词左右。 Dear friends, _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ The Students’ Union 【参考范文】 Dear friends, Wild animals are our friends. Today we want to talk about giant pandas. They are black and white, looking very cute. Also, they have the ability to climb trees easily. However, they are in great danger now. Because of human activities, they are losing their homes and don’t have enough food. It’s time for us to take action. First, we should plant more bamboo. Second, we can help build more nature reserves. Finally, we must not buy products made from wild animals. Let’s work together to protect them! The Students’ Union 【写作解析】 [第一步：审题立意] 确定文体：应用文，以一般现在时为主 明确要点：外貌/特征；能力；危险/困境；保护措施 确定人称：第一人称 注意事项：以校学生会的名义；词数80词左右 [第二步：构思布局] 三段式结构： 开头段：引出要介绍的动物，并介绍其外貌和能力 主体段：介绍其面对的危险或困境 结尾段：具体介绍保护措施 [第三步：要点展开] 要点一：外貌/特征 外貌/特征：black and white/looking very cute/have a round face and short tail/broad cheeks and a small nose/soft body/The fur around its belly is pure white等 要点二：能力 能力：have the ability to climb trees easily/can stand on two legs/are good at climbing and swimming/have strong teeth to eat bamboo等 要点三：危险/困境 危险/困境：in great danger/losing their homes/don’t have enough food/numbers are dropping fast/baby pandas die easily/fewer bamboo forests left等 要点四：保护措施 保护措施：plant more bamboo/build more nature reserves/not buy products made from wild animals/stop cutting down forests/make strict laws to punish killing/raise public awareness through ads等 （四） 为了倡导低碳生活，增加绿色足迹，你作为班长，要向班上的同学发出倡议。请你按照所给提示和要求写一篇题目为“Going Green for a Better Future”的演讲稿，呼吁大家为环境保护出一份力。 注意：可适当加入细节，使内容充实、行文连贯, 词数100左右。 Going Green for a Better Future ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【参考范文】 Going Green for a Better Future Hello, everyone! Today, I am honored to stand here and talk about “Going Green for a Better Future”. Our planet is in trouble, facing some environmental challenges, so we should take action in our daily life. First, let’s sort waste. It helps recycle useful things and reduce pollution. Second, choose green travel. It helps reduce air pollution and traffic jams. Third, save water. Turn off the tap when it is not in use. Last but not least, don’t forget to use reusable shopping bags when you go shopping. Small actions can make a big difference. Let’s go green for a better future! Thank you! 【写作解析】 写作步骤 [第一步：审题立意] 确定文体： 演讲稿/倡议书，主要运用一般现在时（阐述现状、提出建议）。 明确要点： 围绕“绿色环保，共创美好未来”的主题，需涵盖四个核心要素：①开场问候并引出环保主题；②提出具体的环保行动建议（垃圾分类、绿色出行、节约用水、使用环保袋）；③总结全文，强调微小行动的巨大力量；④发出号召并致谢。 确定人称： 第一人称复数(We/Us)为主，结合第二人称(You)，拉近与听众的距离，增强倡议的号召力。 注意事项： 语言需富有激情和感染力，逻辑连接词使用得当(First, Second, Third, Last but not least)，祈使句的使用要自然。 [第二步：构思布局] 采用“总—分—总”结构： 开头段： 礼貌问候，开门见山地点明演讲主题，指出当前面临的环境挑战，呼吁大家采取行动。 主体段： 分层次详细阐述四项具体的环保建议。每一项建议都给出了具体的做法及其带来的好处。 结尾段： 总结全文，重申“小行动，大改变”的理念，发出强有力的行动号召，并礼貌致谢。 [第三步：要点展开] 要点一：引出话题与背景 引出话题：talk about “Going Green for a Better Future”/Our planet is in trouble/take action in our daily life/Make changes in our everyday routine等 开场白：I am honored to stand here and talk about.../I feel very privileged to have this chance to speak to you about...等 要点二：建议 垃圾分类：sort waste/recycle useful things/reduce pollution/separate trash/repurpose materials等 绿色出行：choose green travel/reduce air pollution and traffic jams/take sustainable transit/improve air quality等 节约用水：save water/Turn off the tap when it is not in use/use water wisely/cut the drip等 使用环保袋：use reusable shopping bags/when you go shopping/swap plastic for cloth/opt for reusables/during your retail runs/while out buying goods等 要点三：总结与呼吁 Small actions can make a big difference./Let’s go green for a better future!/Little things add up./Small steps, big impact./Tiny changes, huge results.等 （五） 为了增强同学们的环保意识，你校学生会将开展以“Save Our Earth”为主题的倡议活动。请你以学生会的名义，写一封英文倡议书，向全校同学发出号召。 内容包括： 1．说明保护地球的重要性； 2．提出两到三条具体做法； 3．呼吁大家共同行动。 要求： 1．词数80～100，开头已给出，不计入总词数； 2．可适当增加细节，以使行文连贯； 3．倡议书中不得出现真实姓名和学校名称。 Dear fellow students, Our earth is facing serious problems. ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ The Student Union 【参考范文】 Dear fellow students, Our earth is facing serious problems. Pollution is harming our air, water, and soil. Forests are being cut down, and many animals are losing their homes. It’s time for us to take action. To protect our world, we can start with small actions. First, reduce plastic use by carrying reusable bags and bottles. Second, turn off the lights when we leave the room. It’s a good way to save energy. Third, practise recycling and support tree-planting activities. Let’s work together! Remember, the future of our world lies in our hands. Thanks for listening. The Student Union 【写作解析】 [第一步：审题立意] 确定文体：应用文（倡议书），用一般现在时和现在进行时为主 明确要点：保护地球的重要性、提出的具体做法、共同行动的呼吁 确定人称：第一人称（we/us/our） 注意事项：不得出现真实姓名和学校名称；词数80～100 [第二步：构思布局] 三段式结构： 开头段：点明地球面临的问题，强调行动的必要性 主体段：分条列举保护环境的具体小事，如减少塑料使用、节约用电和资源回收等 结尾段：总结全文，发出行动感召并礼貌结尾 [第三步：要点展开] 要点一：保护地球的重要性 环境现状：facing serious problems/harming our air, water, and soil/forests are being cut down/many animals are losing their homes/it’s time to take action/pollution is everywhere/in danger/protect our planet/only one earth等 要点二：具体环保做法 具体建议：reduce plastic use/carrying reusable bags and bottles/turn off the lights/save energy/practise recycling/support tree-planting activities/go to school on foot/save water/use both sides of paper等 要点三：呼吁与号召 行动口号：work together/the future lies in our hands/every small action counts/make a big difference/for a better future/protect our home等 （六） 假定你是李辉，你校正在开展以“The importance of electricity”为主题的英语演讲比赛。请你用英文写一篇演讲稿参加比赛。内容包括： (1)电的重要性； (2)如何节约电； (3)发出倡议。 注意： (1)词数80～100； (2)可适当增加细节，以使行文连贯； (3)文中不能出现真实姓名及学校名称。 The importance of electricity ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【参考范文】 The importance of electricity Electricity is very important in our daily lives. Without it, we can neither watch TV, listen to music nor chat online. That’s to say, electricity is closely related to our daily lives. How can we save electricity? First, turn off lights and fans when we leave a room. Second, use energy-saving bulbs and appliances. Also, don’t leave computers on standby. Let’s take action now! Save electricity, protect our environment, and build a greener future together. Remember, every small step counts. Start from today! 【写作解析】 写作步骤 [第一步：审题立意] 确定文体：应用文 (演讲稿)，时态用一般现在时为主 明确要点：围绕“The importance of electricity”展开，阐述电的重要性、如何节约电并发出倡议 确定人称：第一/第二人称 (we/you) 注意事项：词数80～100；可适当增加细节，行文连贯；文中不能出现真实姓名及学校名称 [第二步：构思布局] 三段式结构： 开头段：点明电在日常生活中的重要性 主体段：列举节约用电的具体做法 结尾段：发出节约用电的倡议与呼吁 [第三步：要点展开] 要点一：电的重要性 作用体现：is very important in our daily lives/plays a key role in our daily lives/has become an essential part of modern life等 生活影响：Without it, we can neither watch TV, listen to music nor chat online./our daily activities would be greatly limited without it/it powers almost all our household and work devices等 要点二：节约用电的做法 具体措施：turn off lights and fans when leaving a room/switch off lights and electrical appliances when not in use/use LED bulbs instead of traditional bulbs等 日常习惯：don’t leave computers on standby/unplug chargers when they’re not in use/set air conditioners to an appropriate temperature等 要点三：发出倡议 呼吁表达：let’s take action now/let’s start saving electricity from small things/everyone should do their part to save electricity等 意义升华：save electricity to protect our environment/saving electricity helps reduce carbon emissions/every small action adds up to a greener future等 （七） 学校微信公众号正在征文，以下是极危动物中华鲟 (Chinese sturgeon) 的信息，请你作为学生代表根据以下信息介绍中华鲟的现状，呼吁大家保护濒危动物，用英语写一封倡议书。向学校投稿。 要点：1. 中华鲟生活在中国的扬子江 (the Yangtze River) 里，能活到40岁，体长可达5米。 2. 现在它们正处于濒危/危险的状态，它们的数量变得越来越少。 3. 请提出1-2条保护中华鲟的建议。 要求：要点齐全；表述通顺；简洁得体；40词左右。 Dear schoolmates, _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Yours, Li Hua 【参考范文】 Dear schoolmates,     The Chinese sturgeon lives in the Yangtze River. It can live up to 40 years and grow to 5 meters long. Now they are in great danger, and the number of them is becoming smaller and smaller. We should protect them by keeping the river clean. Let’s take action together! Yours, Li Hua 【写作解析】 [总体分析] ①题材：本文是一篇应用文，为材料作文； ②时态：时态为一般现在时； ③提示：写作要点已明确突出“保护中华鲟”的核心倡议。 [写作步骤] 第一步，先介绍中华鲟的生存环境、寿命及体型等基本特征； 第二步，再说明中华鲟面临的濒危现状，进而提出具体保护措施，并发出共同行动的倡议。 [亮点词汇] ①live in生活在 ②live up to寿命长达 [高分句型] ①It can live up to 40 years and grow to 5 meters long. (and并列两个谓语动词) ②We should protect them by keeping the river clean. (by + 动名词短语作方式状语) （八） 假设你所在的阳光社区正在创建“绿色家园”，社区服务中心计划在寒假期间开展一系列环保活动。作为社区青少年志愿者团队的成员，请你写一篇倡议书，号召更多居民 (尤其是青少年) 参与其中。你的倡议书需包含以下内容： 1. 简要说明当前社区在环境保护方面存在的主要问题 (至少两点)； 2. 介绍两项寒假期间计划开展的环保活动，并说明其意义； 3. 发出倡议，呼吁大家共同行动，并展望美好未来。 注意： 1. 内容可适当发挥； 2. 倡议书需包含所有要点，可适当增加细节，使条理清楚、行文连贯； 3.文中不得出现真实的姓名和校名； 4. 80词左右，开头和结尾已给出，不计入总词数。 Dear neighbors, We are lucky to call Yangguang Community our home. However, to make it a truly green and sustainable place, we still face some challenges. _____________________________________________________________________ ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Let’s join hands and turn our community into a model of green living! Thank you. The Youth Volunteer Team of Yangguang Community 【参考范文】 Dear neighbors, We are lucky to call Yangguang Community our home. However, to make it a truly green and sustainable place, we still face some challenges. Rubbish is sometimes thrown randomly, and many plastic bags are used without recycling, which pollutes our living space. During the winter holiday, we’ll hold a community cleaning activity to pick up litter and a recycling sharing meeting to teach everyone to sort waste well. These activities can make our community cleaner and raise people’s environmental awareness. Let’s take action actively, especially teenagers. Small efforts from everyone will make our home greener and more beautiful. Let’s join hands and turn our community into a model of green living! Thank you. The Youth Volunteer Team of Yangguang Community 【写作解析】 [总体分析] ①题材：本文是一篇应用文，材料作文； ②时态：时态为“一般现在时”； ③提示：写作要点已明确给出，包括社区当前的环境问题、寒假期间计划开展的环保活动及其意义、发出倡议并展望未来。考生应注意不要遗漏这些要点，并适当添加细节，使文章条理清晰、行文连贯。 [写作步骤] 第一步，点明社区现状：虽宜居，但存在垃圾乱扔、塑料袋未回收等环保问题，引出活动必要性； 第二步，介绍寒假活动：将开展社区清洁与垃圾分类分享会，说明活动能美化环境、提升环保意识； 第三步，发出行动号召：呼吁大家（尤其青少年）积极参与，强调点滴努力可让家园更美好； 第四步，总结倡议：呼吁携手共建绿色社区典范，表达感谢并落款。 [亮点词汇] ①randomly随意地 ②raise people’s environmental awareness提高人们的环保意识 ③take action采取行动 [高分句型] ①Rubbish is sometimes thrown randomly, and many plastic bags are used without recycling, which pollutes our living space. (which引导的非限制性定语从句) ②During the winter holiday, we’ll hold a community cleaning activity to pick up litter and a recycling sharing meeting to teach everyone to sort waste well. (并列句结构) $Unit 7 The natural world单元同步写作讲义 单元写作要求：选择一种生态系统，发表相关倡议，呼吁人们保护该生态系统 本单元的主题属于“人与自然”范畴，涉及“生态保护、野生动物守护、自然环境维护”核心话题。 本单元旨在培养学生关注自然生态、认知海洋、湿地、森林三大核心生态系统的价值与作用，了解生态系统面临的各类破坏问题。通过学习单元阅读文本、对话素材与语法句式，掌握倡议书的写作框架与规范表达，能够条理清晰地介绍生态系统的重要性、现存问题及保护举措。这有助于提升学生的英语应用文写作能力、逻辑表达能力，同时树立爱护自然、守护地球生态的环保意识，实现语言学习与德育教育的结合。 词汇积累 1 / 1 学科网（北京）股份有限公司 1. ecosystem n. 生态系统 2. balance n. 平衡 3. surface n. 表面 4. oxygen n. 氧气 5. pollution n. 污染 6. flood n. 洪水 7. wildlife n. 野生动物 8. protect v. 保护；protection n. 保护 9. provide v. 提供 10. prevent v. 预防，阻止 11. store v. 储存 12. trap v. 吸收，困住 13. harmful adj. 有害的 14. environment n. 环境 15. nature reserve 自然保护区 16. living things 生物 17. get rid of 去除，清除 18. play an important role 发挥重要作用 句式积累 开头句（点明写作目的、引出话题） 1. I am writing today to ask all of you to protect our precious forest ecosystem. 我今天写信是呼吁大家保护珍贵的森林生态系统。 2. As we all know, wetlands are one of the most important ecosystems on the earth. 众所周知，湿地是地球上最重要的生态系统之一。 3. It is necessary for us to take action to save the ocean ecosystem right now. 我们立刻采取行动保护海洋生态系统刻不容缓。 中间句（介绍价值、阐述问题、提出措施） 1. Forests are the “lungs” of the earth and they help clean the air we breathe. 森林是地球之肺，帮助净化我们呼吸的空气。 2. However, many ecosystems are facing serious pollution and human damage now. 然而，如今许多生态系统正面临严重的污染和人类破坏。 3. We should not throw rubbish and we can plant more trees to protect forests. 我们不应乱扔垃圾，还可以植树造林保护森林。 4. Wetlands can store water and prevent floods during rainy seasons. 雨季时，湿地可以蓄水防洪。 结尾句（总结升华、发出呼吁） 1. Let’s work together to protect ecosystems and keep our earth healthy! 让我们共同保护生态系统，守护地球健康！ 2. Small actions can make a big difference to our natural environment. 微小的行动也能为自然环境带来巨大改变。 3. Protecting ecosystems is protecting ourselves. 保护生态系统，就是保护我们自己。 佳句仿写 1. 教材原句：Each ecosystem has a role to play and helps keep the balance of the environment. 每个生态系统都有其作用，有助于维持环境平衡。 仿写：每一片湿地都在保护野生动物、维持自然平衡方面发挥着重要作用。 _______________________________________________________ 2. 教材原句：Forests take in carbon dioxide and produce oxygen to clean the air. 森林吸收二氧化碳、释放氧气，净化空气。 仿写：海洋吸收大量二氧化碳，为生物提供氧气。 _______________________________________________________ 3. 教材原句：It’s time for us to take action and protect the earth’s ecosystems. 是我们采取行动保护地球生态系统的时候了。 仿写：现在正是每个人行动起来，拯救濒危湿地的关键时刻。 _______________________________________________________ 典例 假如你是学校环保社团的成员，请你结合本单元所学知识，以 “Protect Our Forests” 为题，代表校环保社团，写一篇80-100词的英语倡议书，向全校同学呼吁保护森林。内容需包含：1. 森林的重要作用；2. 森林面临的主要问题；3. 我们的保护行动。 ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 审题 ① 题材：应用文（英文倡议书），体裁正式、语气诚恳，以呼吁倡议为核心； ② 人称：以第一人称we为主，兼顾第二人称you，贴合倡议语境； ③ 提示：内容必须涵盖森林价值、现存问题、保护措施三大要点，词数80-100，语句通顺、逻辑清晰，可使用本单元连接词与核心句型。 谋篇布局 开头 开门见山，点明森林的重要地位，引出保护森林的写作目的。 中间 分为两层，先介绍森林净化空气、守护生态的作用，再阐述乱砍滥伐、垃圾污染等问题，最后列举学生可践行的保护措施。 结尾 总结全文，发出倡议，呼吁大家共同守护森林生态系统。 佳作展示 Dear schoolmates, Forests are the “lungs” of the earth and one of the most important ecosystems. They take in carbon dioxide and produce oxygen to clean the air. Also, they are home to thousands of wildlife. However, forests are in danger now. People cut down too many trees and throw rubbish in forests, which damages the ecosystem badly. We must take action to protect them. We can stop wasting paper, plant more trees and tell others the importance of forest protection. Small efforts can make a great difference. Let’s work together to protect our forests! Yours sincerely, Eco-club 佳作赏析 亮点词汇： ① produce oxygen 制造氧气（单元核心短语，贴合生态话题） ② in danger 处于危险中（精准描述生态现状） ③ make a great difference 大有作用（高分万能结尾短语） 高分句型： ① 并列句型：They take in carbon dioxide and produce oxygen to clean the air.（运用单元重点并列结构，句式工整） ② 非限制性定语从句：People cut down too many trees and throw rubbish in forests, which damages the ecosystem badly.（升级句式，提升文章层次感） （一） 假设你是李华，你所在的学校正在开展“旧物新生”环保活动。请你用英语写一封倡议书，号召同学们积极参与旧物捐赠或交换活动。内容包括： 1.说明旧物闲置的问题和资源浪费现象； 2.提出处理旧物的建议（捐赠、交换、回收等）； 3.呼吁大家行动起来，保护环境。 要求：1.包含所有要点，可适当发挥； 2.语句通顺，语法正确，书写规范； 3.词数100词左右（开头已给出，不计入总词数）。    Dear fellow students,    Do you have old things that you no longer use? They may be books, clothes, or toys that just sit in your room collecting dust. ____________________________________________________________________________________________________________________________________________________________________________ Yours sincerely, Li Hua （二） 假定你是李华，你校英语演讲比赛在即，这次的主题是“Environmental Protection in My Hometown”，请根据以下图表内容提示，写一篇演讲稿，倡议大家保护家乡的环境。 Environmental Protection in My Hometown Problems the water pollution; … Solutions build waste water treatment plants (修建污水处理厂); … Improvement the water will be cleaner; … Hopes Everyone should… I hope my hometown will be… … 注意： 1. 写作词数为80左右； 2. 文中不能出现可能透露考生真实身份的任何信息。 ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ （三） 请从下侧的图片中选择一种野生动物，并根据思维导图的提示，以校学生会的名义写一封英文倡议书，以便号召更多的同学加入保护野生动物的队伍。 注意事项： （1）倡议书须包括思维导图中的所有提示要点，要求语句通顺、意思连贯； （2）思维导图中的省略号部分应作适当发挥； （3）词数80词左右。 Dear friends, _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ The Students’ Union （四） 为了倡导低碳生活，增加绿色足迹，你作为班长，要向班上的同学发出倡议。请你按照所给提示和要求写一篇题目为“Going Green for a Better Future”的演讲稿，呼吁大家为环境保护出一份力。 注意：可适当加入细节，使内容充实、行文连贯, 词数100左右。 Going Green for a Better Future ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ （五） 为了增强同学们的环保意识，你校学生会将开展以“Save Our Earth”为主题的倡议活动。请你以学生会的名义，写一封英文倡议书，向全校同学发出号召。 内容包括： 1．说明保护地球的重要性； 2．提出两到三条具体做法； 3．呼吁大家共同行动。 要求： 1．词数80～100，开头已给出，不计入总词数； 2．可适当增加细节，以使行文连贯； 3．倡议书中不得出现真实姓名和学校名称。 Dear fellow students, Our earth is facing serious problems. ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ The Student Union （六） 假定你是李辉，你校正在开展以“The importance of electricity”为主题的英语演讲比赛。请你用英文写一篇演讲稿参加比赛。内容包括： (1)电的重要性； (2)如何节约电； (3)发出倡议。 注意： (1)词数80～100； (2)可适当增加细节，以使行文连贯； (3)文中不能出现真实姓名及学校名称。 The importance of electricity ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ （七） 学校微信公众号正在征文，以下是极危动物中华鲟 (Chinese sturgeon) 的信息，请你作为学生代表根据以下信息介绍中华鲟的现状，呼吁大家保护濒危动物，用英语写一封倡议书。向学校投稿。 要点：1. 中华鲟生活在中国的扬子江 (the Yangtze River) 里，能活到40岁，体长可达5米。 2. 现在它们正处于濒危/危险的状态，它们的数量变得越来越少。 3. 请提出1-2条保护中华鲟的建议。 要求：要点齐全；表述通顺；简洁得体；40词左右。 Dear schoolmates, _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Yours, Li Hua （八） 假设你所在的阳光社区正在创建“绿色家园”，社区服务中心计划在寒假期间开展一系列环保活动。作为社区青少年志愿者团队的成员，请你写一篇倡议书，号召更多居民 (尤其是青少年) 参与其中。你的倡议书需包含以下内容： 1. 简要说明当前社区在环境保护方面存在的主要问题 (至少两点)； 2. 介绍两项寒假期间计划开展的环保活动，并说明其意义； 3. 发出倡议，呼吁大家共同行动，并展望美好未来。 注意： 1. 内容可适当发挥； 2. 倡议书需包含所有要点，可适当增加细节，使条理清楚、行文连贯； 3.文中不得出现真实的姓名和校名； 4. 80词左右，开头和结尾已给出，不计入总词数。 Dear neighbors, We are lucky to call Yangguang Community our home. However, to make it a truly green and sustainable place, we still face some challenges. _____________________________________________________________________ ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Let’s join hands and turn our community into a model of green living! Thank you. The Youth Volunteer Team of Yangguang Community $