Unit1 The Changing World Section A (2a-2d) 导学案（2026-2027学年人教版九年级英语上册）

该初中英语导学案围绕“家乡变迁与生态治理”主题，聚焦环境类词汇（如sandstorm, bush）、used to do与现在完成时的今昔对比表达，以及治沙主题对话的听力理解。通过课前词汇积累、句型翻译搭建基础，课堂听力任务分步骤（预测内容、抓关键信息、梳理“过去问题-行动-改善”逻辑链），结合语言点仿写和口语对话练习（提供句型支架），形成连贯的学习脉络。 资料亮点在于融合语言能力、思维品质与文化意识培养。听力策略训练（听前预测、听中抓关键词）提升信息提取能力，治沙逻辑链梳理强化因果分析思维，融入中国北方治沙成就增强环保意识。习题设计覆盖单选、句型转换、阅读及书面表达，梯度合理，助力学生在真实语境中运用语言，提升综合语言运用能力。

Unit1 The Changing World Section A (2a-2d) 导学案 【学习目标】 语言能力。掌握 sandstorm, bush, root, hold the soil, sandy, government support 等环境类词汇；能运用 used to do 描述过去状况，用现在完成时描述变化结果；能听懂治沙主题对话并提取关键信息。 文化意识。了解中国北方治沙造林成就，理解生态保护的重要性，增强环保意识。 思维品质。能梳理"过去问题—采取行动—现在改善"的因果逻辑链，联系实际提出环保建议。 【学习重难点】 重点。听懂治沙对话并提取关键信息；运用 used to do 与现在完成时进行今昔对比。 难点。梳理治沙逻辑链；口语输出中准确切换 used to 与现在完成时。 【课前预习·自主研读】 一、词汇积累 写出下列单词或短语的中文意思。 sandstorm __________ bush __________ root __________ hold the soil __________ sandy areas __________ government support __________ mechanized planting __________ ecosystem __________ 二、句型预习 翻译下列句子，注意划线部分的用法。 1. There used to be sandstorms all the time. ________________________________________________________________ 2. We began planting it in sandy areas. ________________________________________________________________ 3. I'm amazed by how green your hometown has become! ________________________________________________________________ 4. It has taken us many years to make it green. ________________________________________________________________ 【课堂探究·合作互动】 探究一：听力任务（2a-2c） Task 1 Pre-listening。看图片和标题，预测对话内容：What is the conversation about? Who are talking? ________________________________________________________________ Task 2 First listening。听第一遍，回答：What is the main change of the hometown? ________________________________________________________________ Task 3 Second listening。听第二遍，完成下表。 Aspects Past Present Environment Fields Action taken Task 4 Third listening。听第三遍，补全治沙逻辑链。 sandstorms all the time → ____________ → big sandstorm hit → decided to act → ____________ (long roots, hold soil) → ____________ → government support → ____________ → hometown has become green 探究二：核心语言点 1. used to do / There used to be 用法：表示过去常常做某事或过去存在某种状态，现在已不如此。to 后接动词原形。 否定：didn't use to do　疑问：Did...use to do? 仿写：我的家乡过去有很多污染。____________________________________ 2. 现在完成时表变化（has/have + 过去分词） 用法：强调过去发生的动作对现在造成的影响或结果，常与 already, yet, ever, never, how long, since 等连用。 例句：How green your hometown has become! / The situation has improved a lot. 仿写：我们学校已经变得越来越美了。________________________________ 3. It takes sb. some time to do sth. 用法：表示"做某事花费某人多长时间"。it 为形式主语，真正主语是后面的不定式。 仿写：他们花了十年时间让这片沙地变绿。________________________________ 4. begin doing sth. / begin to do sth. 用法：开始做某事。两种形式常可互换。 仿写：他们开始在沙地上种树。________________________________ 探究三：口语练习（2d） Step 1。朗读 2d 示例对话，划出 used to 和现在完成时的句子。 Step 2。选择一个环境问题（air pollution / water pollution / litter / noise），仿照示例编对话，要求包含：过去状况→采取措施→现在变化。 语言支架： · There used to be... / It used to be... · People began to... / The government provided... · Now it has become... / The situation has improved. · What should we do to...? / We can... 我的对话（至少6句）： ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ 【知识梳理·体系建构】 项目 内容 主题 家乡变迁与生态治理（治沙造林） 核心词汇 sandstorm, bush, root, hold the soil, sandy, government support, ecosystem 核心句型 There used to be... / It used to be...（过去）；has/have become...（现在变化）；It takes sb. time to do...；begin doing sth. 治沙逻辑链 沙尘暴频发→田地缩小→特大沙尘暴→决定行动→发现固土灌木→沙地种植→政府扶持→机械化扩种→生态改善 听力策略 听前预测→听中抓关键词（时间、动作、结果）→听后梳理逻辑链 【当堂检测·巩固提升】 一、单项选择 1. There ________ be a lot of sandstorms here, but now the environment has improved a lot. A. use to　B. used to　C. is used to　D. was used to 2. —How does your hometown look now? —It ________ much greener than before. A. has become　B. became　C. becomes　D. is becoming 3. It ________ the villagers over 20 years to turn the desert into green land. A. spent　B. took　C. cost　D. paid 4. We began ________ trees in the sandy areas to stop the sandstorms. A. plant　B. planted　C. planting　D. to planting 5. The bush has long ________ that can hold the soil together. A. leaves　B. roots　C. flowers　D. trunks 6. —________? —We found a special bush and planted it everywhere. A. What did you do to solve the problem B. How did you find the bush C. When did you start planting D. Where did you plant the bushes 二、句型转换 7. There used to be a small river here.（改为否定句） There ________ ________ to be a small river here. 8. My hometown has become very beautiful.（改为感叹句） ________ ________ my hometown has become! 9. It took them three years to plant all the trees.（对划线部分提问） ________ ________ did it take them to plant all the trees? 10. They began to protect the environment 10 years ago.（用现在完成时改写） They ________ ________ the environment for 10 years. 三、阅读理解 阅读短文，判断正（T）误（F）。 Maowusu Desert was once one of the largest deserts in China. About 70 years ago, sandstorms were common and the land was covered with sand. People there used to live a hard life. But thanks to years of hard work, things have changed greatly. Local people found that a kind of bush called "shami" could grow well in sand. Its long roots could hold the soil and stop the sand from moving. They began planting these bushes in large areas. The government also provided support, including money and technology. Now, more than 90% of the Maowusu Desert has been turned into green land. The sandstorms have almost disappeared. This is a great achievement in China's fight against desertification. 11. Maowusu Desert is the largest desert in the world.（　　） 12. People there used to live a hard life because of sandstorms.（　　） 13. The "shami" bush has long roots that can hold the soil.（　　） 14. The government didn't provide any support for the planting.（　　） 15. Now most of the Maowusu Desert has become green.（　　） 四、书面表达 16. 请根据提示，用英语写一段5—6句话的短文，描述你家乡的环境变化。要求包含：过去状况（used to）、采取的措施、现在变化（现在完成时）。 提示词：used to be dirty / began to plant trees / government provided support / has become clean and green ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ 【参考答案】 课前预习 一、词汇积累。沙尘暴；灌木；根；固定土壤；沙化地区；政府扶持/支持；机械化种植；生态系统。 二、句型预习。 1. 过去这里总是刮沙尘暴。（used to be 表过去存在的状态） 2. 我们开始在沙化地区种植它。（begin doing sth. 开始做某事） 3. 你的家乡变得这么绿，真让我惊叹！（现在完成时 has become 强调变化结果） 4. 我们花了很多年才让它变绿。（It takes sb. time to do sth.） 课堂探究 探究一 Task 3。Past: sandstorms all the time; fields getting smaller. Present: green hills; huge corn fields. Action: found bush with long roots → planted in sandy areas → government support → mechanized planting. 探究一 Task 4。fields getting smaller; found a small bush; planted it in sandy areas; mechanized planting（意思对即可） 探究二仿写（参考答案）。 1. There used to be a lot of pollution in my hometown. 2. Our school has become more and more beautiful. 3. It took them ten years to make the sandy land green. 4. They began planting trees in the sandy areas.（或 began to plant） 当堂检测 一、单项选择。1.B　2.A　3.B（It takes sb. time to do 固定句型）　4.C（begin doing）　5.B（roots 根）　6.A 二、句型转换。7. didn't use　8. How beautiful　9. How long　10. have protected 三、阅读理解。11.F（是中国最大的沙漠之一，不是世界最大）　12.T　13.T　14.F（政府提供了资金和技术支持）　15.T（90%以上已变绿） 四、书面表达（参考范文）。My hometown used to be dirty and covered with sand. The air was not clean and there were few trees. Then people began to plant trees every year, and the government provided support too. It took us many years to improve the environment. Now my hometown has become clean and green. We are proud of the changes. 学科网（北京）股份有限公司 $