Unit 13 We're trying to save the earth!单元知识总结 人教版九年级全册

Unit 13 – We’re Trying to Save the Earth
1. 课文主题概述
本单元的主题是“环境保护与地球的可持续发展”。学生将学习如何用英语表达与环境相关的话题，并讨论人类活动对地球的影响。学习目标包括：
掌握与环境保护、生态问题相关的词汇和短语。
学会用英语讨论气候变化、污染等全球性议题。
了解并使用描述解决方案和建议的句型。
2. 单词与短语讲解
核心单词：
pollution (n.) 污染
例句：Air pollution is a major problem in many cities.
衍生：pollute (v.) 污染；pollutant (n.) 污染物
recycle (v.) 回收利用
例句：It’s important to recycle paper, plastic, and glass.
衍生：recycling (n.) 回收；recyclable (adj.) 可回收的
environment (n.) 环境
例句：Protecting the environment is everyone’s responsibility.
衍生：environmental (adj.) 环境的；environmentalist (n.) 环保主义者
waste (n./v.) 浪费；废物
例句：We should reduce waste and reuse materials.
短语：waste of time 浪费时间
global warming (n.) 全球变暖
例句：Global warming affects animals and plants around the world.
核心短语：
save the earth 拯救地球
例句：We need to take action to save the earth.
cut down 砍伐
例句：Too many trees are being cut down each year.
turn off 关闭
例句：Turn off the lights when you leave the room.
take action 采取行动
例句：It’s time to take action to protect the environment.
reduce, reuse, recycle 减少，重复使用，回收
例句：The three “R”s of environmental protection are reduce, reuse, and recycle.
3. 句型与语法重点
A. 提出解决方案的句型
We should...
例句：We should recycle more to reduce waste.
It’s important to...
例句：It’s important to protect endangered animals.
One way to... is to...
例句：One way to save water is to take shorter showers.
If we... , we can...
例句：If we stop cutting down trees, we can protect animal habitats.
B. 讨论环境问题的句型
There is too much...
例句：There is too much plastic waste in the oceans.
... is causing...
例句：Global warming is causing polar ice to melt.
The more we... , the more we...
例句：The more we recycle, the less waste we produce.
4. 课文重点解析
课文通过讨论地球环境问题和保护地球的行动方式，帮助学生掌握如何用英语表达保护环境的紧迫性：
描述环境问题：
There is too much pollution in our city.
Global warming is affecting weather patterns.
提出行动方案：
We should reduce waste by recycling more.
It’s important to turn off lights to save energy.
讨论个人和社会责任：
A: What can we do to help the environment
B: We can start by using less plastic.
5. 课堂练习
A. 翻译句子
我们应该减少使用塑料袋。
拯救地球是我们每个人的责任。
如果我们减少浪费，我们可以保护环境。
空气污染对人类健康有害。
B. 选词填空
选词：pollution, recycle, waste, save, environment
We can ________ energy by turning off the lights when we don’t need them.
Air and water ________ are serious problems in many cities.
It’s important to protect our ________.
We should try to reduce ________ by reusing things.
Many materials, like paper and plastic, can be ________.
C. 完成对话
A: What’s one way we can help protect the earth
B: We should try to ________ things like paper and plastic.
A: What about water
B: We should ________ water by using only what we need.
6. 拓展阅读与写作
A. 阅读短文
主题：Small Actions, Big Impact
Even small actions can make a big difference in protecting our planet. For example, using a reusable water bottle can reduce plastic waste. Walking or biking instead of driving can save energy and reduce pollution. When everyone does their part, these small changes add up to help the earth.
问题：
How can using a reusable water bottle help the environment
Why is it important for everyone to do their part
B. 写作任务
题目：What Can We Do to Protect the Earth
要求：用5-8句话描述如何保护地球，包括：
你认为有效的环保措施。
你个人可以采取的行动。
范例：
One way to protect the earth is to reduce waste. I can start by recycling paper, plastic, and glass. I also try to use less water by taking shorter showers. Walking or biking instead of driving helps reduce pollution. If everyone makes small changes, we can make a big difference in saving our planet.
【编者注：这份讲义帮助学生系统掌握Unit 13的环境保护相关词汇、短语、句型和课文要点，为学生提供了多种表达建议和解决方案的句型。】