Unit 5 Water is life 单元知识点梳理 沪教版英语七年级下册

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Unit 5 Water is life 单元知识点梳理 沪教版英语七年级下册

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Unit 5 Water is life 单元知识点梳理
一、重点单词
1. water / w t (r)/ n. 水 v. 浇水;给……供水(不可数名词;短语:save water 节约用水;drink water 喝水)
2. life /la f/ n. 生命;生活(复数:lives;核心短语:Water is life 水是生命)
3. important / m p tnt/ adj. 重要的(名词:importance;短语:be important for 对……重要)
4. necessary / nes s ri/ adj. 必要的;必需的(反义词:unnecessary;短语:it’s necessary to do sth. 做某事有必要)
5. save /se v/ v. 节约;拯救;保存(短语:save water 节约用水;save one’s life 挽救生命)
6. waste /we st/ v. 浪费 n. 浪费;垃圾(短语:waste water 浪费水;a waste of... 对……的浪费)
7. use /ju z/ v. 使用 /ju s/ n. 用途;使用(短语:use water 用水;make use of 利用)
8. useful / ju sfl/ adj. 有用的(反义词:useless;短语:be useful for 对……有用)
9. drink /dr k/ v. 喝;饮用 /dr k/ n. 饮料(过去式/过去分词:drank/drunk;短语:drink clean water 喝干净的水)
10. clean /kli n/ adj. 干净的;清洁的 v. 打扫;净化(短语:clean water 干净的水;clean the river 净化河流)
11. dirty / d ti/ adj. 脏的;污浊的(反义词:clean;动词:dirty 弄脏)
12. pollute /p lu t/ v. 污染(名词:pollution;形容词:polluted 被污染的;短语:pollute the water 污染水源)
13. pollution /p lu n/ n. 污染(不可数名词;短语:water pollution 水污染)
14. fresh /fre / adj. 新鲜的;清新的(短语:fresh water 淡水;fresh air 新鲜空气)
15. pure /pj (r)/ adj. 纯净的;洁净的(短语:pure water 纯净水)
16. flow /fl / v. 流动;流淌 n. 流;水流(短语:water flow 水流;flow into 流入)
17. river / r v (r)/ n. 河;江(短语:a clean river 清澈的小河;the Yellow River 黄河)
18. sea /si / n. 海;海洋(短语:the sea 大海;sea water 海水)
19. lake /le k/ n. 湖;湖泊(短语:a big lake 大湖;lake water 湖水)
20. ocean / n/ n. 海洋(复数:oceans;短语:the Pacific Ocean 太平洋)
21. drop /dr p/ n. 滴;水珠 v. 掉落;滴下(短语:a drop of water 一滴水;drop into 滴入)
22. tap /t p/ n. 水龙头(短语:turn off the tap 关掉水龙头;a water tap 水龙头)
23. shower / a (r)/ n. 淋浴;阵雨 v. 淋浴(短语:take a shower 洗淋浴;a cold shower 冷水澡)
24. wash /w / v. 洗;洗涤(过去式/过去分词:washed/washed;短语:wash hands 洗手;wash clothes 洗衣服)
25. bath /bɑ θ/ n. 洗澡;浴缸 v. 洗澡(短语:have a bath 洗澡;take a bath 洗澡)
26. pour /p (r)/ v. 倒;倾倒;涌出(短语:pour water 倒水;pour into 倒入)
27. dry /dra / adj. 干的;干燥的 v. 弄干(反义词:wet;短语:dry land 旱地)
28. thirsty / θ sti/ adj. 口渴的;缺水的(短语:feel thirsty 感到口渴;thirsty land 缺水的土地)
29. protect /pr tekt/ v. 保护(短语:protect water 保护水资源;protect...from... 保护……免受……)
30. everywhere / evriwe (r)/ adv. 到处;处处(短语:water is everywhere 水无处不在)
二、重点短语
1. Water is life 水是生命
2. save water 节约用水
3. waste water 浪费水
4. clean water 干净的水
5. dirty water 脏水
6. fresh water 淡水
7. pure water 纯净水
8. water pollution 水污染
9. a drop of water 一滴水
10. turn off the tap 关掉水龙头
11. turn on the tap 打开水龙头
12. take a shower 洗淋浴
13. have a bath 洗澡
14. wash hands 洗手
15. wash clothes 洗衣服
16. pour water 倒水
17. pollute the water 污染水源
18. protect water resources 保护水资源
19. be important for 对……重要
20. be necessary for 对……必不可少
21. a waste of water 浪费水
22. drink water 喝水
23. flow into the river 流入河里
24. keep water clean 保持水源清洁
25. in daily life 在日常生活中
三、重点句型
1. —Why is water important for us
—Because water is life, and we can’t live without it.
(—为什么水对我们来说很重要?—因为水是生命,我们离开水无法生存。)
2. Water is necessary for all living things on the earth, like animals, plants and humans.
(水对地球上所有的生物都是必不可少的,比如动物、植物和人类。)
3. We must save water in our daily life and don’t waste even a drop of water.
(我们必须在日常生活中节约用水,甚至不浪费一滴水。)
4. Please turn off the tap when you brush your teeth, because it can save a lot of water.
(刷牙时请关掉水龙头,因为这样能节约很多水。)
5. It’s a waste of water to leave the tap running when you wash your face.
(洗脸时让水龙头一直流着是一种浪费水的行为。)
6. Many rivers and lakes are polluted now, so we should protect water and keep it clean.
(现在很多河流和湖泊都被污染了,所以我们应该保护水资源并保持其清洁。)
7. We can take a shower instead of having a bath, because a shower uses less water.
(我们可以洗淋浴而不是泡澡,因为淋浴用的水更少。)
8. Water pollution is a big problem for us, and we must stop polluting the river and sea.
(水污染对我们来说是个大问题,我们必须停止污染河流和海洋。)
9. It’s very important to protect water resources for our future life.
(为了我们未来的生活,保护水资源是非常重要的。)
10. All living things need water to live, so we should use water carefully and wisely.
(所有生物都需要水来生存,所以我们应该谨慎且明智地用水。)
四、重点词汇辨析
1. take a shower & have a bath
短语 含义侧重 用水特点 例句
take a shower 洗淋浴,站着用水冲淋 用水量少,更节水 We should take a shower to save water.(我们应该洗淋浴来节约用水。)
have a bath 泡澡,在浴缸里用水浸泡 用水量大 Don’t have a bath too often, it wastes a lot of water.(不要经常泡澡,这会浪费很多水。)
2. save & waste
词汇 词性与含义 反义关系 核心搭配 例句
save v. 节约、拯救;n. 挽救 与waste互为反义词 save water, save energy, save one’s life We must save water in daily life.(我们必须在日常生活中节约用水。)
waste v. 浪费;n. 浪费、垃圾 与save互为反义词 waste water, waste time, a waste of money Don’t waste water when you wash vegetables.(洗菜时不要浪费水。)
3. clean & dirty & pure
词汇 含义 适用场景 例句
clean 干净的、无杂质的,普通用语 形容日常可饮用、使用的水 We need to drink clean water every day.(我们每天需要喝干净的水。)
dirty 脏的、污浊的,clean的反义词 形容被污染、有杂质的水 Don’t pour dirty water into the river.(不要把脏水倒入河里。)
pure 纯净的、无任何杂质的,程度比clean深 形容纯净水、天然无污染的水 The pure water from the mountain is very sweet.(山里的纯净水很甜。)
4. pollute & pollution
词汇 词性 含义 核心搭配/例句
pollute v. 动词 污染(具体动作) People mustn’t pollute the lake water.(人们不许污染湖水。)
pollution n. 不可数名词 污染(抽象概念) Water pollution is bad for all living things.(水污染对所有生物都有害。)
5. use (v.) & make use of
词汇/短语 含义侧重 用法 例句
use 普通用语,表“使用”,直接接宾语 use + 物(water/pen/book) We use water to wash clothes and cook food.(我们用水洗衣服和做饭。)
make use of 强调“充分利用”,正式度稍高 make (full) use of + 物 We should make full use of water and not waste it.(我们应该充分利用水资源,不浪费它。)
五、重点语法
1. 情态动词must/mustn’t/should/shouldn’t的综合运用
本单元核心语法,围绕节约用水、保护水资源表达义务、禁止、建议,是七年级下册情态动词的强化运用,贴合日常用水与环保的语言表达场景。
(1)must:表必须、义务,强调节约用水和保护水源的必要性
- 结构:主语 + must + 动词原形 + 其他
- 例句:We must save water every day.(我们必须每天节约用水。)/ We must keep the river clean.(我们必须保持河流清洁。)
(2)mustn’t:表禁止、不许,强调不能做的浪费水、污染水的行为
- 结构:主语 + mustn’t + 动词原形 + 其他
- 例句:We mustn’t waste water in our daily life.(我们不许在日常生活中浪费水。)/ We mustn’t pollute the fresh water.(我们不许污染淡水。)
(3)should:表应该,提出节约用水、保护水资源的具体建议
- 结构:主语 + should + 动词原形 + 其他
- 例句:We should turn off the tap when we brush our teeth.(我们应该在刷牙时关掉水龙头。)
(4)shouldn’t:表不应该,指出错误的用水行为
- 结构:主语 + shouldn’t + 动词原形 + 其他
- 例句:We shouldn’t leave the tap running for a long time.(我们不应该让水龙头一直流很久。)
2. it作形式主语的两大句式
本单元高频运用,用于评价用水行为的重要性、必要性或浪费性,是七年级下册重点句式的巩固与拓展,贴合本单元核心话题。
(1)It’s + 形容词 + (for sb.) to do sth.
- 核心含义:评价做某事的重要性、必要性,形容词多为important/necessary/useful/good
- 例句:It’s important for us to protect water resources.(保护水资源对我们来说很重要。)/ It’s necessary to save every drop of water.(节约每一滴水是有必要的。)
(2)It’s + a + 名词 + to do sth.
- 核心含义:评价做某事是一种“浪费/遗憾”,本单元核心用a waste of...
- 例句:It’s a waste of water to take a bath every day.(每天泡澡是一种浪费水的行为。)/ It’s a waste of time to wait for the tap to run clean water.(等水龙头流出干净的水是浪费时间。)
3. 连词because引导的原因状语从句
用于解释“为什么要节约用水/保护水资源”的原因,主句表观点(如要节约用水、禁止污染水),从句表具体原因,句式简单,无复杂时态变化,贴合七年级下册学情。
(1)核心结构
主句(表用水/护水观点) + because + 从句(表原因)
(2)本单元例句
- We must save water because water is life for all living things.(我们必须节约用水,因为水是所有生物的生命之源。)
- We shouldn’t pollute the river because many fish live in it.(我们不应该污染河流,因为很多鱼生活在里面。)
4. 祈使句(肯定式/否定式/委婉式)
本单元用于发出节约用水、保护水源的指令和建议,是七年级下册祈使句的实用化运用,多为日常用水的提醒语,简洁易懂。
(1)肯定式:动词原形 + 其他
- 例句:Turn off the tap in time.(及时关掉水龙头。)/ Keep the water clean.(保持水源清洁。)
(2)否定式:Don’t + 动词原形 + 其他
- 例句:Don’t waste water.(不要浪费水。)/ Don’t pour dirty water into the lake.(不要把脏水倒入湖里。)
(3)委婉式:Please + 动词原形/Don’t + 动词原形
- 例句:Please save every drop of water.(请节约每一滴水。)/ Please don’t leave the tap running.(请不要让水龙头一直流着。)
六、写作指导(水的重要性/节约用水倡议类短文)
1. 核心写作结构
主题一:水的重要性(最核心)
部分 内容要点 本单元常用表达
开头 总述水的核心地位,点题“水是生命”,引出水的重要性 Water is life. It is one of the most important things on the earth. All living things can’t live without water.
主体 分2-3点说明水的具体作用:① 对人类(饮用、日常用水);② 对动植物(生长、生存);③ 对自然(维持生态平衡) First, water is necessary for humans. We need water to drink, wash hands, cook food and do many other things in daily life. Second, animals and plants also need water to grow. Third, water keeps the nature in balance, like making rivers and lakes lively.
结尾 总结水的价值,引出“节约用水、保护水源”的观点 Water is so important for us. We must save water and protect water resources, not waste or pollute it.
主题二:节约用水的倡议书
部分 内容要点 本单元常用表达
开头 点明现状(水资源短缺、部分人浪费水/污染水),提出“节约用水”的倡议 Water is precious, but now many people waste water and pollute water resources. Fresh water is getting less and less, so it’s time for us to save water in daily life.
主体 分点提出具体的节水措施:① 日常用水细节(关水龙头、洗淋浴);② 重复利用水(洗菜水浇花、洗衣服水拖地);③ 保护水源(不污染、呼吁身边人节水) First, we must turn off the tap in time when we brush teeth or wash face. We can take a shower instead of having a bath. Second, we can reuse water—use the water to wash vegetables to water flowers. Third, we mustn’t pollute the river and tell our family to save water with us.
结尾 呼吁大家行动起来,表达节水的美好愿景 Saving water is everyone’s duty. Every drop of water counts. Let’s work together to save water and protect our earth!
2. 范文示例(主题一:水的重要性)
The Importance of Water
Water is life. It is the most precious thing on the earth and it is necessary for all living things. We can’t live a happy life without water, and the earth will be dry and dead without water too.
First, water is very important for humans. We need clean water to drink every day—if we don’t drink water, we will feel thirsty and even get ill. We also use water to do many things in daily life, like washing hands, cleaning the house, cooking food and washing clothes. Second, animals and plants can’t grow without water. Little animals need water to drink, and flowers and trees need water to grow up. If there is no water, the grass will turn yellow and the little animals will be in danger. Third, water keeps our nature beautiful. It makes rivers and lakes flow, and makes the sea blue. Water keeps the nature in balance and makes our world lively.
Water is so important for us, animals, plants and the whole earth. We must know the value of water. We should save water and protect water resources, and never waste even a drop of water.
3. 范文示例(主题二:节约用水倡议书)
Let’s Save Water Together
Water is life and it is precious. But now many people waste water in daily life, and some people pollute the river and lake. The fresh water on the earth is getting less and less. Saving water is our duty, and we must save water from the small things in life.
What can we do to save water First, we must form a good habit. Please turn off the tap in time when we brush our teeth or wash our face. We can take a shower instead of having a bath, because a shower uses much less water. Second, we can reuse water in our life. We can use the water to wash vegetables to water the flowers, and use the water to wash clothes to clean the floor. It’s a good way to save water. Third, we mustn’t pour dirty water into the river or sea, and we can tell our parents, classmates and friends to save water with us.
Every drop of water counts. Saving water is protecting ourselves and our beautiful earth. Let’s take action now and save water from every small thing. I believe our earth will be more beautiful with enough clean water!

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