Unit 1 The Changing World Section A 2a-2d 课件 2026-2027学年人教版英语九年级上册

该初中英语课件围绕“环境变化”主题，聚焦沙尘暴、耕地短缺等核心环境问题，涵盖相关词汇（如sandstorm、farmland）及语法（used to、现在完成时）。课堂导入通过我国新疆、青海等地的真实环境数据情境，引导学生排序问题并结合马斯洛需求理论分析，搭建从词汇预习到听力理解的学习支架。 其亮点在于采用词根词缀法（如sandstorm拆解为sand+storm）提升词汇学习能力，结合三江源生态等本土案例培养文化意识，通过问题排序与理论分析锻炼思维品质。听力按“过去困境-治理措施-现在改善”时间线梳理，小结系统整合知识点，分层作业满足不同学生需求。学生能提升语言运用与思维能力，教师可高效开展差异化教学。

Unit 1 The Changing World Section A 2a-2d 目录 新单词预习 Vocabulary 课堂导入 Lead in 新知学习 Knowledge 课堂巩固练习题 Exercise 课堂小结 Summary 分层课后作业 Homework Vocabulary 1. sandstorm / s ndst m/n. 沙尘暴 复合词:sand(沙子)+ storm(暴风雨) 沙子风暴 沙尘暴 2. farmland / f ml nd/n. 耕地 复合词:farm(农田、耕作)+ land(土地) 耕种的土地 耕地 3. shortage / t d /n. 短缺 词根:short(adj. 短的,不足的) 后缀:-age 名词后缀, 表 “状态、总量” short + -age 不足的状态 短缺 4. lack /l k/n. 缺乏 原生词根,无拆分,可关联记忆:lack=lacks(缺少) 5. bush /b /n. 灌木 基础单词,衍生:bushy adj. 灌木丛生的(-y 形容词后缀) 词根词缀拆解速记 6. root /ru t/ n. 根 核心词根:root- 表 “根、根源” 衍生:rooted adj. 生根的;uproot v. 连根拔起(up - 向上 + root 根) 7. soil /s l/n. 土壤 基础词,同根:soiled adj. 沾泥土的 8. sandy / s ndi/adj. 含沙的;铺满沙子的 词根:sand n. 沙子 后缀:-y 形容词后缀,表 “充满… 的” sand + -y 满是沙子的 含沙的 9. government / v nm nt/n. 政府 词根链:govern v. 统治、管理 govern + -ment government n. 管理机构 政府(-ment 名词后缀,表机构 / 行为) 10. support /s p t/n.&v. 支持 前缀:sup- = sub- 向下、在底下 词根:port 搬运、承载 sup(在下方)+ port(承载) 在底下托住 支撑、支持 11. corn /k n/n. 玉米;谷物 基础词根,无词缀拆分,固定记忆 翻译句子: The shortage of water makes the sandy soil lose its root, the government gives support to grow corn on the farmland, stop sandstorm and protect the bush. 中文翻译 水资源短缺让沙质土壤流失根系,政府提供支持在耕地种植玉米,抵御沙尘暴、保护灌木。 Lead in 我国沙尘暴核心发源地 生态自然环境最脆弱 综合科技创新水平相对最弱 田地(耕地)人均最短缺 新疆 青海 西藏 福建 1.全国沙尘气象数据显示,南疆塔里木盆地年沙尘暴日数全国第 一,局部区域年均沙尘超 50 天 2.全省 70% 区域属于三江源、柴达木高寒干旱区:平均海拔 3000 米以上、氧气稀薄、全年低温、降水极少、植被恢复极慢、冻土广布,土地沙化、草原退化、水土流失风险全国最高;同时大范围戈壁荒漠,生存自然约束极强 3.《中国区域科技创新评价报告 2025》全国 31 省区综合得分 排名,西藏常年垫底 4.福建 “八山一水一分田”,山地丘陵占全省 80% 以上,平地极少; 人均耕地仅 0.58 亩,低于联合国 0.8 亩粮食安全警戒线 sandstorms difficult environment lack of technology farmland shortage 2a Rank the following problems from 1 to 4, with 1 being the worst. sandstorms difficult environment farmland shortage lack of technology 3 2 1 4 knowledge Give your reasons. difficult environment sandstorms farmland shortage lack of technology 按马斯洛层级严重性排序 farmland shortage 耕地短缺 破坏生理需求(吃饭根本) difficult environment(缺水恶劣环境) 同样冲击生理需求,次于耕地短缺 3.sandstorms 沙尘暴 破坏安全需求,威胁稳定生存环境 4.lack of technology 技术匮乏 仅限制顶层自我实现,不威胁生存 2b Listen to the conversation between George’s father and Li Rui’s grandfather. What problems in 2a did they mention? √ √ They mentioned two problems —sandstorms and farmland shortage. difficult 、 sandstorms farmland 、 lack of 、 environment shortages technology get 、 fewer sandstorms huge 、 have 、 better farmland / fields machines 2c Past There used to be _ all the time, and the _ were getting smaller and smaller. Locals worked by _. Action Locals found a bush. It had _ roots that could _the soil together. They began planting it in sandy _, with the government’s support. They had _ to help. Present The corn fields are _. They have planted many bushes and _ since then. They are _sandstorms now and the environment is getting _. It has improved local lives. Listen again and fill in the table. How has the environment affected local lives? sandstorms fields hand long hold areas machines huge trees fewer better Listening Scripts Bob: I'm amazed by how green your hometown has become! Grandpa: Have you seen the corn fields outside of the town yet? Bob: Yeah!They're huge! Grandpa: There used to be sandstorms all the time, and the fields were getting smaller and smaller. Then, after one big sandstorm, we decided to do something. Bob: What did you do? Grandpa: We found a small bush. It had long roots that could hold the soil together. We began planting it in sandy areas. The government provided support too. Bob: Wasn't it difficult to plant so many bushes? Grandpa: Yes, it was. At the beginning, we worked by hand. Later, we had machines to help. We have planted many bushes and trees since then. There are fewer sandstorms now and the environment is getting better. It has also improved our lives. Everyone has become richer and happier. 2d Discuss the changes in 1c. How do you think they happened? A: The area used to be covered with sand. B: What did they do to solve this problem? A: They planted bushes and trees. The land has become ... A: The area used to be covered with sand. B: What did they do to solve this problem? A: They planted bushes and trees. The land has become rich and suitable for farming. At first they worked by hand, then machines gave them help. With the government’s support, soil is well protected. The difficult environment has totally changed. Exercise 一、英汉互译 sandstorms _ farmland shortage _ lack of technology _ difficult environment _ 固定沙土 _ 手工劳作 _ 政府扶持 _ 长根系 _ 沙尘暴 耕地短缺 技术匮乏 恶劣环境 hold the soil together work by hand government’s support long roots 二、根据对话简答 1.What two serious problems did the place have in the past? There were constant sandstorms and farmland was becoming smaller and smaller. 2.What kind of bush did people find? What’s its function? A bush with long roots. Its long roots can hold the soil together to stop sandstorms. 3.What two supports did local people get? The government provided support and later machines helped with planting. 根据所学内容,填入合适的单词或短语 Great changes have taken place in Li Rui’s hometown. In the past, people spent 1._ getting to the town. The bus ride to school needed 2._ on bumpy roads. People 3._ go a long way to visit doctors because there was no 4._ here. There were no places for 5. , and the hills were full of 6. . Now everything is different. New roads cut the travel time to just 7. . It only takes 8. to get to school. A new 9._ stands in the town, and a 10._ is right down the street. Lots of trees are planted on hills, so they look green and beautiful. half a day 40 minutes used to hospital shopping sand an hour 15 minutes hospital supermarket Summary (一)核心 4 大环境问题(2a) sandstorms 沙尘暴 difficult environment 恶劣环境(缺水) farmland shortage 耕地短缺 lack of technology 技术匮乏 (二)听力对话核心脉络(Past-Action-Present 时间线) Past(过去困境) 常年沙尘暴、耕地不断缩减;农耕完全依靠人力劳作,无机械设备。 Action(治理措施) 寻找长根系灌木固定沙土,在沙地大规模种植;政府提供扶持;引入机器辅助种植。 Present(现在改善) 玉米田面积广阔;大量灌木树木落地;沙尘暴减少、环境变好;居民生活富裕幸福。 (三)重点词汇 & 短语 sandstorm n. 沙尘暴;farmland n. 耕地;bush n. 灌木;root n. 根;soil n. 土壤 sandy adj. 含沙的;government n. 政府;support n.&v. 支持;machine n. 机器 used to do 过去常常;hold the soil together 固定沙土;work by hand 手工劳作 (四)核心语法 used to + 动词原形:描述过去持续存在、现在已改变的状态 / 动作 例:There used to be sandstorms all the time. 过去这里常年沙尘暴。 现在完成时 have/has + 过去分词:强调从过去持续到现在的结果 例:We have planted many bushes since then. 比较级 fewer(更少)、better(更好)体现环境前后变化 Homework A 层 基础巩固(学困生) 背诵本课 4 个环境类短语 + 10 个重点单词,中英抄写 2 遍; 完整默写 2c 听力填空原文; 熟读 2b 对话 3 遍,能通顺朗读。 B 层 能力提升(中等生) 完成课堂全部基础 + 提升练习题; 背诵 2b 对话,脱稿口头复述过去、行动、现在三段变化; 用 5 句话描述家乡环境的过去与现在(必须用上 used to、现在完成时)。 C 层 拓展创新(优等生) 完成拓展层排序题 + 仿写对话; 小短文写作(80 词左右): How We Stopped Sandstorms 要求包含:过去难题、治理措施、如今改变、个人感悟; 3.思考:结合马斯洛需求理论,说明为什么 farmland shortage 比 lack of technology 危害更大,写下 3 条英文观点。 $