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仁爱版七年级下册英语 Unit 8 Our Blue Planet Developing the Topic 知识点总结
一、重点单词
1. 环境与自然类扩展
renewable energy（可再生能源）、sustainable development（可持续发展）、ecosystem（生态系统）、greenhouse effect（温室效应）、carbon footprint（碳足迹）、conservation（保护）、biodegradable（可生物降解的）、emission（排放）
2. 动植物类扩展
extinct（灭绝的）、migrate（迁徙）、pollinator（传粉者）、ecotourism（生态旅游）、marine life（海洋生物）、biodiversity（生物多样性）
3. 行动与建议类扩展
advocate（倡导）、promote（促进）、restore（恢复）、limit（限制）、substitute（替代）、educate（教育）、innovate（创新）
4. 其他类扩展
sustainable（可持续的）、responsible（负责任的）、urgent（紧迫的）、impact（影响）、balance（平衡）、awareness（意识）
二、重点短语
1. 环保行动类扩展
use renewable energy（使用可再生能源）、reduce carbon footprint（减少碳足迹）、promote sustainable living（倡导可持续生活）、restore ecosystems（恢复生态系统）、limit plastic use（限制塑料使用）
2. 描述环境问题类扩展
acid rain（酸雨）、ocean acidification（海洋酸化）、soil erosion（土壤侵蚀）、loss of biodiversity（生物多样性丧失）、plastic pollution（塑料污染）
3. 建议与倡议类扩展
take urgent action（采取紧急行动）、raise environmental awareness（提高环保意识）、support eco-friendly products（支持环保产品）、adopt green habits（养成绿色习惯）、participate in reforestation（参与植树造林）
三、重点句型
1. 表达解决方案
- If we plant more trees, the air quality will improve.（如果我们种更多树，空气质量会改善。）
- Using public transport is more eco-friendly than driving alone.（使用公共交通比独自开车更环保。）
2. 强调重要性
- It’s urgent to reduce greenhouse gas emissions.（减少温室气体排放刻不容缓。）
- Protecting marine life is as important as saving forests.（保护海洋生物与保护森林同样重要。）
3. 呼吁合作
- Only by working together can we achieve a sustainable future.（只有共同努力，我们才能实现可持续的未来。）
- Let’s take responsibility for our planet!（让我们为地球承担责任！）
四、重点语法
1. 条件句（If... will...）
- 结构：If + 一般现在时，主语 + will + 动词原形
- 例句：
- If we recycle more, we will reduce waste.（如果我们多回收，就能减少浪费。）
- If people stop hunting, endangered species will survive.（如果人们停止捕猎，濒危物种就能生存。）
2. 比较级表达环保措施
- 结构：A is more/less... than B
- 例句：
- Solar energy is cleaner than coal.（太阳能比煤炭更清洁。）
- Walking is healthier than driving.（步行比开车更健康。）
3. 被动语态在环保话题中的应用
- 结构：主语 + be动词 + 过去分词
- 例句：
- Plastic bags are banned in many countries.（许多国家禁止使用塑料袋。）
- The environment is being damaged by pollution.（环境正被污染破坏。）
五、练习题
（一）单词拼写
1. We should use re__________ energy like solar power.
2. Many animals face ext__________ due to habitat loss.
3. It’s important to red__________ our carbon footprint.
4. Acid r__________ harms forests and lakes.
5. We must pro__________ sustainable development.
（二）短语翻译
1. 减少碳足迹 __________
2. 生物多样性丧失 __________
3. 支持环保产品 __________
4. 海洋酸化 __________
5. 采取紧急行动 __________
（三）句型转换
1. If we limit plastic use, the ocean will be cleaner.（改为否定条件句）
If we __________ plastic use, the ocean __________ cleaner.
2. Solar energy is cleaner than coal.（用最高级改写）
Solar energy is __________ energy.
3. Plastic bags are banned in many countries.（对划线部分提问）
__________ banned in many countries
（四）用所给动词的适当形式填空
1. If everyone __________ (plant) a tree, the city __________ (become) greener.
2. The government __________ (promote) eco-friendly policies next year.
3. It’s necessary __________ (protect) marine life from pollution.
4. Many forests __________ (destroy) by wildfires last year.
5. You __________ (should) use reusable bags instead of plastic ones.
（五）阅读理解
The world is facing a climate crisis. Rising temperatures cause ice to melt, leading to higher sea levels. Many coastal cities may disappear in the future. However, we can slow down global warming by using renewable energy, planting trees, and reducing emissions. For example, driving electric cars produces fewer greenhouse gases. If we act now, future generations will live on a healthier planet.
1. What causes sea levels to rise
A. Deforestation B. Melting ice C. Air pollution
2. How can we slow down global warming
A. By using more coal B. By planting trees C. By wasting energy
3. What is an example of reducing emissions
A. Driving electric cars B. Cutting down forests C. Using plastic bags
4. What is the main idea of the passage
A. Climate crisis is unavoidable.
B. Actions can help fight global warming.
C. Sea levels are not a problem.
答案
（一）单词拼写
1. renewable
2. extinction
3. reduce
4. rain
5. promote
（二）短语翻译
1. reduce carbon footprint
2. loss of biodiversity
3. support eco-friendly products
4. ocean acidification
5. take urgent action
（三）句型转换
1. don’t limit; won’t be
2. the cleanest
3. What is
（四）动词填空
1. plants; will become
2. will promote / is going to promote
3. to protect
4. were destroyed
5. should
（五）阅读理解
1. B
2. B
3. A
4. B

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