Unit 8 Our Blue Planet 单元知识点梳理 仁爱科普版英语七年级下册

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Unit 8 Our Blue Planet 单元知识点梳理 仁爱科普版英语七年级下册

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Unit 8 Our Blue Planet 单元知识点梳理
一、重点单词
1. planet / pl n t/ n. 行星;星球(短语:the blue planet 蓝色星球;on this planet 在这个星球上)
2. earth / θ/ n. 地球;大地(短语:on the earth 在地球上;save the earth 拯救地球)
3. environment / n va r nm nt/ n. 环境(形容词:environmental 环境的;短语:protect the environment 保护环境)
4. pollute /p lu t/ v. 污染;弄脏(名词:pollution 污染;短语:pollute the air 污染空气)
5. pollution /p lu n/ n. 污染;污染物(不可数名词;短语:air pollution 空气污染;water pollution 水污染)
6. waste /we st/ v.&n. 浪费;废弃物(短语:waste water 浪费水;waste paper 废纸)
7. save /se v/ v. 节约;拯救(短语:save energy 节约能源;save animals 拯救动物)
8. reuse / ri ju z/ v. 再利用;重新使用(短语:reuse glass bottles 重复使用玻璃瓶)
9. recycle / ri sa kl/ v. 回收利用;循环使用(短语:recycle plastic 回收塑料)
10. energy / en d i/ n. 能量;能源(短语:solar energy 太阳能;save energy 节约能源)
11. coal /k l/ n. 煤;煤炭(不可数名词;短语:burn coal 烧煤)
12. oil / l/ n. 石油;油(不可数名词;短语:oil pollution 石油污染)
13. forest / f r st/ n. 森林(复数:forests;短语:cut down forests 砍伐森林)
14. ocean / n/ n. 海洋(复数:oceans;短语:the Atlantic Ocean 大西洋)
15. protect /pr tekt/ v. 保护(短语:protect wild animals 保护野生动物)
16. harmful / hɑ mfl/ adj. 有害的(反义词:useful;短语:be harmful to 对……有害)
17. plastic / pl st k/ n. 塑料;塑料制品(短语:plastic bags 塑料袋)
18. fresh /fre / adj. 新鲜的;清新的(短语:fresh air 新鲜空气;fresh water 淡水)
19. dirty / d ti/ adj. 脏的(反义词:clean;比较级:dirtier;最高级:dirtiest)
20. reduce /r dju s/ v. 减少;降低(短语:reduce waste 减少浪费)
21. alive / la v/ adj. 活着的;有生气的(短语:keep alive 保持存活)
22. wild /wa ld/ adj. 野生的;野外的(短语:wild animals 野生动物)
23. plant /plɑ nt/ v.&n. 种植;植物(短语:plant trees 种树;green plants 绿色植物)
24. stop /st p/ v. 停止;阻止(短语:stop doing sth. 停止做某事;stop sb. from doing sth. 阻止某人做某事)
25. necessary / nes s ri/ adj. 必要的;必需的(短语:it’s necessary to do sth. 做某事是必要的)
26. important / m p tnt/ adj. 重要的(短语:it’s important to protect the earth 保护地球很重要)
27. electricity / lek tr s ti/ n. 电;电力(不可数名词;短语:save electricity 节约用电)
28. litter / l t (r)/ n.&v. 垃圾;乱扔垃圾(短语:pick up litter 捡起垃圾)
29. public / p bl k/ adj. 公共的(短语:public transport 公共交通)
30. action / k n/ n. 行动;行为(短语:take action 采取行动)
二、重点短语
1. save the earth 拯救地球
2. protect the environment 保护环境
3. pollute the air/water 污染空气/水
4. cut down forests 砍伐森林
5. waste energy/water 浪费能源/水
6. reuse glass bottles 重复使用玻璃瓶
7. recycle plastic/paper 回收塑料/纸
8. solar energy 太阳能
9. be harmful to 对……有害
10. be good for 对……有益
11. fresh air/water 新鲜空气/淡水
12. dirty rivers 肮脏的河流
13. on the earth 在地球上
14. the blue planet 蓝色星球
15. reduce waste 减少浪费
16. stop doing sth. 停止做某事
17. plant trees 种树
18. save electricity 节约用电
19. use public transport 使用公共交通
20. throw away 扔掉
21. pick up litter 捡起垃圾
22. live a green life 过绿色生活
23. take action 采取行动
24. burn coal 烧煤
25. protect wild animals 保护野生动物
三、重点句型
1. —What can we do to protect our blue planet
—We can save water and reuse old bottles.
(—我们能做什么来保护我们的蓝色星球?—我们可以节约用水,重复使用旧瓶子。)
2. Pollution is harmful to our environment. We should stop polluting it right now.
(污染对我们的环境有害,我们应该立刻停止污染它。)
3. It’s important to save energy, because coal and oil are non-renewable resources.
(节约能源很重要,因为煤和石油是不可再生资源。)
4. We shouldn’t cut down too many forests, because trees help keep the air fresh.
(我们不应该砍伐太多森林,因为树木有助于保持空气清新。)
5. How about recycling plastic bags instead of throwing them away It can reduce waste.
(回收塑料袋而不是扔掉它们怎么样?这样可以减少浪费。)
6. If we plant more trees every year, the earth will become greener and more beautiful.
(如果我们每年种更多树,地球会变得更绿更美。)
7. My teacher advised us to use public transport as much as possible to reduce air pollution.
(我的老师建议我们尽可能使用公共交通来减少空气污染。)
8. —Should we stop using plastic bags
—Yes, we should. They are harmful to the ocean animals.
(—我们应该停止使用塑料袋吗?—是的,应该。它们对海洋动物有害。)
9. Saving every drop of water is necessary for protecting our blue planet.
(节约每一滴水对保护我们的蓝色星球来说很有必要。)
10. Let’s take small actions every day to make our earth a better place to live.
(让我们每天采取小行动,让地球成为更宜居的地方。)
四、重点词汇辨析
1. save & protect
词汇 含义与用法 例句
save 侧重“拯救(脱离危险)、节约(避免浪费)”,可接人、物或资源 We must save the endangered animals before they die out. We should save electricity by turning off lights when leaving rooms.
protect 侧重“保护(免受伤害)”,常用搭配“protect...from/against...” We need to protect the forests from being cut down. Wearing masks can protect us from air pollution.
2. pollute & pollution
词汇 含义与用法 例句
pollute 动词,表“污染”的动作,主语多为人或人类活动 Factories pollute the river with dirty water every day.
pollution 不可数名词,表“污染”的状态或现象 Air pollution is getting worse in some big cities.
3. reuse & recycle
词汇 含义与用法 例句
reuse 动词,指“重复使用”原物品,不改变物品形态 We can reuse glass bottles to hold water or flowers.
recycle 动词,指“回收利用”,将物品加工后再使用 We should recycle paper to save trees.
4. alive & living
词汇 含义与用法 修饰对象 例句
alive 形容词,表“活着的、有生气的”,强调存活状态,常作表语 人/物 Is the fish still alive in the bowl
living 形容词,表“活着的、现存的”,可作表语或定语 人/物 The panda is one of the most precious living animals in the world.
五、重点语法
1. 情态动词can/can’t表建议与能力
- 含义:can表示“能够、可以”,用于提出可行的环保建议或表达能力;can’t表示“不可以、不能”,用于禁止破坏环境的行为。
- 句式结构:
① 肯定句:主语 + can + 动词原形 + 其他
例:We can reuse old boxes to make storage bins.
② 否定句:主语 + can’t + 动词原形 + 其他
例:We can’t throw litter on the ground.
③ 一般疑问句:Can + 主语 + 动词原形 + 其他?(肯定回答:Yes, ...can.;否定回答:No, ...can’t.)
例:—Can we use solar energy to heat our houses —Yes, we can.
2. if引导的条件状语从句(主将从现)
- 含义:用于表达环保行为带来的结果,从句用一般现在时,主句用一般将来时。
- 句式结构:If + 主语 + 一般现在时,主语 + will + 动词原形 + 其他
例:If we save every drop of water, we will have enough fresh water in the future.
例:If we cut down fewer trees, the air will be much fresher.
3. 动名词作主语
- 含义:将环保相关的动作作为主语,强调行为的重要性。
- 句式结构:动名词短语 + be + 形容词/名词 + 其他
例:Saving energy is one of the best ways to protect the earth.
例:Recycling plastic helps reduce ocean pollution.
4. 祈使句(表环保倡议)
- 含义:用于提出简洁有力的环保建议或号召,主语常省略。
- 句式结构:
① 肯定句:动词原形 + 其他
例:Plant more trees in spring. / Use cloth bags instead of plastic bags.
② 否定句:Don’t + 动词原形 + 其他
例:Don’t burn coal for heating. / Don’t pour dirty water into rivers.
③ 委婉式:Let’s + 动词原形 + 其他
例:Let’s pick up litter in the park together.
六、写作指导(介绍环保方式/保护地球)
1. 写作结构
部分 内容要点 常用表达
开头 点明地球的重要性,引出“保护蓝色星球”的主题 The earth is our only home. It’s important for us to protect this blue planet. Without a healthy earth, we can’t live happily.
主体 分点阐述环保的具体做法(节约资源、减少污染、回收利用、保护动植物等) First, we should save energy and water—turn off lights when leaving and reuse water. Second, we can reduce pollution by using public transport. Third, recycle waste like paper and plastic, and reuse old items. Finally, we need to protect wild animals and plant more trees.
结尾 总结环保的意义,呼吁大家共同行动 Protecting the earth is everyone’s duty. Let’s take small actions every day to make our blue planet greener and cleaner.
2. 范文示例
How to Protect Our Blue Planet
The earth is our beautiful blue planet and the only home for humans. Protecting it is the most important thing we can do. Here are some simple but useful ways to protect our earth.
First, we should save energy and water. We can turn off lights, TVs and computers when we don’t use them. We should also reuse water—for example, use the water we wash hands with to water plants. These small actions can save a lot of resources.
Second, we need to reduce pollution. We can use public transport like buses or bikes instead of cars to cut down air pollution. We shouldn’t throw litter on the ground or pour dirty water into rivers. It’s also best to use cloth bags instead of plastic bags, because plastic is harmful to ocean animals.
Third, recycling and reusing are important. We can recycle paper, glass and plastic. We can also reuse old boxes as storage bins or turn old bottles into flower pots. This helps reduce waste and save trees.
Finally, we should protect wild animals and forests. We shouldn’t cut down too many trees, because trees keep the air fresh. We should also stop killing wild animals for their fur or meat.
Protecting our blue planet is everyone’s job. Let’s start with small actions today. Our earth will become more beautiful if we all try our best!

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