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Unit 4 单元话题写作指导
2025-2026学年沪教版英语七年级上册
【单元话题分析】
本单元话题围绕“地球与环境保护”展开，核心是运用一般现在时描述地球的特征（如表面构成、生态资源）与当前环境问题（如塑料污染、过度捕鱼），结合there be句型介绍地球资源分布，用情态动词（must/should/can） 提出具体的环保行动建议。写作需兼顾“事实陈述—问题分析—行动呼吁”，通过具体案例（如塞罕坝治沙、红树林保护）体现环保的重要性，传递“守护地球”的责任意识。
【单元写作指导】
话题词汇必备
【单词】
Earth 地球
sea 海洋
desert 沙漠
forest 森林
pollution 污染
protect 保护
recycle 回收
species 物种
ecosystem 生态系统
resource 资源
clean 清洁的
dangerous 危险的
precious 珍贵的
responsible 有责任的
【短语】
solar system 太阳系
70% of the Earth 地球的70%
be covered by 被……覆盖
plastic pollution 塑料污染
clean up the beach 清理海滩
national nature reserve 国家级自然保护区
provide food and water 提供食物和水
stop polluting rivers 停止污染河流
sea animals in danger 濒危海洋动物
take care of the Earth 爱护地球
reduce waste 减少浪费
support life 维系生命
话题句子必备
The Earth is our home—about 70% of its surface is covered by sea, which provides food for many animals.
地球是我们的家园——其表面约70%被海洋覆盖，为许多动物提供食物。
There are many beautiful forests on Earth, but some are being cut down, making animals lose their homes.
地球上有许多美丽的森林，但有些正在被砍伐，导致动物失去家园。
Plastic pollution is harmful to sea animals—we should use fewer plastic bags and recycle plastic bottles.
塑料污染对海洋动物有害——我们应该少用塑料袋，回收塑料瓶。
We must clean up the beach when we see rubbish there, because even small waste can hurt sea birds and fish.
看到海滩上有垃圾时，我们必须清理，因为即使是小小的废弃物也会伤害海鸟和鱼类。
Zhanjiang Mangrove National Nature Reserve is important—it protects the coast and provides a home for many rare birds.
湛江红树林国家级自然保护区很重要——它保护海岸，为许多珍稀鸟类提供栖息地。
Last month, our class went to the park to pick up rubbish—we learned that small actions can help protect the Earth.
上个月，我们班去公园捡垃圾——我们明白了小小的行动也能帮助保护地球。
【话题范文必背】
Protect Our Precious Earth
The Earth is the only planet in the solar system that can support life—it gives us fresh air, clean water and delicious food. But now, our Earth is in danger because of human activities.
I saw a sad video last week: a turtle was hurt by a plastic ring around its neck, and many fish died because of polluted river water. Also, some deserts are getting bigger because people cut down too many trees. For example, the Maowusu Desert used to be very large, but workers planted millions of trees there, turning part of it into a green forest. This shows that we can change the bad situation if we try.
What can we do to protect the Earth First, we can use reusable cups instead of plastic ones. Second, we can plant small trees in our community. Third, we can tell our family and friends to stop throwing rubbish into rivers.
The Earth is precious, and it’s everyone’s duty to protect it. Let’s work together to make our home cleaner and safer!
保护我们珍贵的地球
地球是太阳系中唯一能维系生命的行星——它为我们提供新鲜的空气、干净的水和美味的食物。但现在，由于人类活动，我们的地球正处于危险之中。
上周我看了一个令人难过的视频：一只海龟被脖子上的塑料环弄伤，许多鱼因为河水污染而死亡。此外，由于人们砍伐过多树木，一些沙漠正在扩大。比如，毛乌素沙地曾经面积很大，但工作人员在那里种了数百万棵树，把部分沙地变成了绿色森林。这说明只要我们努力，就能改变糟糕的局面。
我们能做些什么来保护地球呢？首先，我们可以用可重复使用的杯子代替塑料杯。其次，我们可以在社区里种小树苗。第三，我们可以告诉家人和朋友不要往河里扔垃圾。
地球很珍贵，保护它是每个人的责任。让我们一起努力，让我们的家园更干净、更安全！
【话题写作训练】
你的笔友Emma来信说她最近了解到“蓝鲸濒危”的消息，很担心，想知道蓝鲸面临的危险以及我们能如何保护它们。请你以李华的身份回复邮件，简述蓝鲸濒危的原因，分享你知道的保护措施，并结合“减少海洋污染”提出具体建议。
提示词语
blue whale 蓝鲸
overfishing 过度捕鱼
ocean pollution 海洋污染
protect 保护
提示问题
Why are blue whales in danger
What can people do to protect blue whales
What small actions can Emma take to help reduce ocean pollution
要求
要点齐全，结构清晰，可适当补充细节；
文中不得出现真实姓名和校名；
词数80左右，开头、结尾已给出，不计入总词数。
思路点拨
开头：回应Emma的担忧，点明会介绍蓝鲸濒危原因与保护方法；
中间：先说明蓝鲸濒危的原因（过度捕鱼、海洋污染），再讲宏观保护措施（建立保护区、禁止过度捕捞），最后给Emma提具体建议（回收塑料、不往海里扔垃圾）；
结尾：鼓励Emma坚持环保，表达对蓝鲸保护的信心。
写作练习
Dear Emma,
I’m sorry to hear you’re worried about blue whales. They’re in danger mainly because of overfishing and ocean pollution—some get hurt by fishing nets, and plastic in the sea makes them sick.
People have built nature reserves to protect blue whales and stopped overfishing. For you, you can recycle plastic bottles and tell your family not to throw rubbish into the sea.
Every small action helps. Let’s hope blue whales will live safely soon!
Yours,
Li Hua

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