内容正文:
Unit4 The Earth
⭐Section 3导学案
学习目标
1. 掌握四大环境破坏类词汇、环保行动短语、多组音标,双人看图问答开展环保话题猜谜对话;
2. 掌握写作三步流程,理清文章三段式框架:地球美景、现存环境问题、环保解决办法,完成构思、写作、自查修改完整写作任务;
3. 综合运用 There be 句型、一般现在时、本单元形容词,完成口语问答、环保主题短文写作两大输出任务;
4. 清晰认识过度捕捞、农药污染、废气、乱砍滥伐四大环境危机,树立低碳环保、守护地球家园的责任意识。
一、预习案(课前自主完成)
(一)词汇预习・基础过关
1. 四大地球环境问题短语
海洋过度捕捞:catch a lot of fish, fewer and fewer fish in the sea
农药水污染:use dangerous farm chemicals, less clean groundwater
工业废气污染:burn oil and gas for energy, harmful gases
森林砍伐:cut down trees for farms, less forest land
2. 写作三段素材词汇
地球美景:high mountains, blue seas, beautiful rivers
环境问题:water pollution, plastic pollution, sea animals die
环保举措:factories stop polluting rivers; bring own shopping bags; save water; plant trees
3. 音标单元词汇
/ʌ/ colour, rubbish, other, under
/ɑː/ after, large, card, plant
/ɒ/ hot, want, on, wash
/ɔː/ August, short, four, small
/ʊ/ could, put, full, wood
/uː/ blue, pollute, food, shoe
/k/ cow, cute, kill
/ɡ/ bag, grain, ground
4. 写作核心句型抄写 + 翻译
1. People catch lots of fish, so there are fewer and fewer fish in the sea every year.
译:________________________________________
2. The Earth is beautiful with high mountains, blue seas and clear rivers, but we are harming it in many ways.
译:________________________________________
3. We only have one Earth, so we must take action to protect it.
译:________________________________________
(二)预习思考(通读 P59-P61)
1. 口语板块列出四类地球环境问题分别是什么?
2. 写作文章分为哪三大段落板块?每一段的写作内容是什么?
3. 完整写作三步流程是什么?写完作文需要自查哪四项内容?
二、课堂探究案(课中小组合作完成)
探究任务一:语篇问题链・分层研读口语范例 & 写作框架
基础浅层任务 1:口语对话逻辑梳理
1. What’s the fixed dialogue pattern for this speaking task?
S1: What problem is the Earth facing?
S2: People … There are … as a result.
2. List four environmental problems from the four pictures:
Overfishing; chemical water pollution; industrial gas pollution; deforestation.
基础浅层任务 2:写作三段框架拆解
Para1(开篇):The Earth is a beautiful planet — describe mountains, seas, rivers with There be
Para2(主体 1):The problems the Earth is facing — list water, plastic, forest, air pollution
Para3(主体 2 & 结尾):Ways to protect the Earth — factory rules, daily small actions; ending appeal to protect our only home
进阶理解问题链(写作逻辑梳理)
1. Why do we separate scenery, problems and solutions into three parts?
It makes the article clear: praise the beauty first, point out the crisis, then offer practical solutions.
2. What grammar must we use in this writing task?
There be to describe scenery & pollution; simple present for daily human activities; adjectives to describe clean / dirty environment.
3. What daily small green actions can we add in the third part?
Bring cloth bags, save water, plant trees, pick up beach rubbish, cut down plastic use.
深度思辨问题
Which environmental problem worries you most? What small things can you do to improve it?
(二)合作探究・小组活动突破(4 人互助小组)
活动 1:词汇分类 & 音标朗读
1. 词汇分为环境破坏、环保措施、自然景物三类,轮流口头造句;
2. 分组朗读音标例句,区分长短元音 /ʌ//ɑː//ɒ//ɔː//ʊ//uː/ 与清浊辅音 /k//ɡ/。
活动 2:双人看图问答口语任务(课本 Speaking)
两人轮流提问、回答四类环境问题,模板:
S1: What problem is the Earth facing?
S2: People burn oil and gas to make energy. There are more and more harmful gases in the air.
S1: Your turn please!
活动 3:写作构思小组互助
每位学生勾选写作素材清单,小组互相补充更多环保举措、优美景物描写句型,完善写作素材。
(三)迁移表达・分层输出
迁移 1:口头基础输出 —— 介绍一类地球环境问题(不少于 4 句)
模板:
Now people cut down lots of trees to build farms. There are fewer and fewer forests. Trees can clean air, so this is a big problem for our planet. We should plant more trees to change it.
迁移 2:双人综合问答对话(覆盖全部四类污染)
A: What’s the pollution problem from factories?
B: They burn oil and gas, and make harmful gases. It pollutes the air.
A: What happens if we catch too many fish?
B: There will be fewer fish in the sea, and sea animals lose food.
A: What can we do to protect the Earth?
B: We can bring cloth shopping bags and stop wasting water.
迁移 3:书面综合输出 —— 完整作文 Protect the Earth
严格遵循三步写作法,通篇使用 There be 句型、单元环保词汇,不少于 9 句话。
写作框架:
1. 标题 Protect the Earth
2. 第一段:描写地球优美自然风光(高山、蓝海、河流,用 There be);
3. 第二段:列举多种环境污染问题(过度捕捞、农药、废气、乱砍树、塑料污染);
4. 第三段:分工厂、普通人日常两方面写保护措施;
5. 结尾升华:地球是唯一家园,人人都要行动保护。
三、课后拓展案(分层巩固作业)
基础层(全体必做)
1. 环境问题、环保措施词汇、音标单词抄写 2 遍并背诵;流利朗读音标练习短句;
2. 梳理写作三大素材板块,完成写作 Plan 素材清单勾选;
3. 仿写 5 句环保主题句子,搭配 There be 句型。
提升层(中等学生选做)
1. 双人脱稿完成课本看图问答口语对话;
2. 完整完成写作三步:勾选素材→书写全文→逐项自查修改;
3. 整理四类环境污染英文表达,分条摘抄积累。
培优拓展层(学有余力)
1. 1 分钟口语展示:完整介绍至少两类地球环境问题 + 对应解决办法;
2. 对比短文写作 Clean Earth vs Polluted Earth,灵活运用 There be 肯定 / 否定;
3. 拓展任务:搜集一条国际环保小倡议,补充进写作素材。
课堂小结(课堂留白填写)
1. 四大环境危机:过度捕捞、农药水污染、工业废气、乱砍滥伐;
2. 写作三段结构:地球美景 → 现存污染问题 → 环保解决办法;
3. 写作三步流程:Plan 列素材 → Write 写正文 → Check and revise 自查修改;
4. 核心句型:There be 描述景物与污染;People + 动词原形 描述人类破坏行为。
当堂检测(5 分钟小测)
一、英汉互译
1. fewer and fewer fish ________________
2. harmful gases from factories ________________
3. 自带购物袋 ________________
4. 减少森林土地 ________________
二、用 there is /there are 填空
1. ______ lots of plastic in the sea.
2. ______ fewer and fewer trees on the land.
3. ______ a lot of dangerous farm chemicals in the river.
三、单项选择
1. People ______ too many fish, so sea life is in danger.
A. catch B. catches C. catching
2. We ______ bring our own bags to protect the Earth.
A. should B. shouldn’t C. can’t
3. There ______ high mountains and clear rivers on the Earth.
A. is B. are C. am
四、翻译句子
1. 人们大量捕捞鱼类,海洋里鱼越来越少;农田大量使用危险农药,洁净地下水变少;工厂燃烧油气产生能源,有害气体持续增多;人们砍伐树木开辟农田,森林面积不断缩减。
2. 地球是美丽星球,拥有高山、蓝海与清澈河流;但人类以多种方式伤害它,我们仅有一个地球,必须行动起来保护它。
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