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Unit 1 Section B (2a~2c) 教案
—— The Changing World (人教版九年级上册 2026-2027学年)
课题 Unit 1 Section B (2a~2c) The Changing World 学科 英语
年级 九年级（上册） 教材版本 人教版（2026-2027学年）
课时 第4课时 课型 词汇构词+阅读课
教学方法 PPP五步教学法、构词归纳、任务型阅读、语篇填空法 教学用具 多媒体课件、合成词卡片、阅读任务卡、板书
学情分析 学生已学习家乡变化和环境改善话题，掌握部分环境词汇，但对合成词构词规律、Saihanba语篇中的因果关系和环境变化表达仍需要支架。
教学目标 ①语言能力：能理解compound words构成方式，掌握sandstorm, highway, farmland, railroad, product, bridge, wide, capital等词汇，并完成2b和2c任务。②文化意识：通过Saihanba变迁了解生态建设和团队合作的价值。③思维品质：能比较Saihanba过去与现在，分析green miracle形成原因。④学习能力：运用构词法、选词填空、语篇填空和阅读问答策略建构知识。
教学重难点 重点：合成词构成、2b词汇运用、2c Saihanba语篇填空和capital/product/wide语言点。难点：理解Saihanba从sandy lands到green miracle的变化原因，并用hard work, determination, teamwork进行归纳表达。
一、教学过程
Step 1 Warm-up（复习导入+学习目标呈现）（3~5 min）
【教师活动】T: Good morning, class! Look at the topic The Changing World. Today we will learn how small words can make new words and how Saihanba changed from sandy lands into a green miracle. 教师引导学生回顾sandstorm, farmland等已学词汇。
【学生活动】Ss: 学生说出与环境变化有关的词汇，如sandstorm, farmland, highway, bridge, soil, government。
【过渡语】Some of these words are made by putting two words together. Let’s learn compound words.
【知识点】导入目标：复习环境变化词汇，引出合成词和Saihanba阅读主题。
学习目标截图
Step 2 Presentation（知识呈现：合成词+2a+2b词汇运用）（10~15 min）
2a Compound words构词归纳（5~6 min）
【教师活动】T: A compound word is a new word made by putting two or more independent words together. Look at sandstorm, highway, farmland and railroad. What parts can you see
【学生活动】Ss: sandstorm = sand + storm; highway = high + way; farmland = farm + land; railroad = rail + road. 学生继续举例eggplant, pineapple, firefly, scarecrow。
【过渡语】Good. Understanding word parts helps us guess meanings.
【知识点】合成词：两个或两个以上独立单词组合成一个具有新意义的新词。
合成词定义讲解截图
2a合成词配对活动截图
构词 合成词 中文释义
sand + storm sandstorm 沙尘暴
high + way highway 公路；高速路
farm + land farmland 农田
rail + road railroad 铁路
egg + plant eggplant 茄子
pine + apple pineapple 菠萝
fire + fly firefly 萤火虫
scare + crow scarecrow 稻草人
知识拓展：合成词的意思通常与两个组成词有关，但不一定等于逐词直译，如pineapple不是“松树苹果”，而是“菠萝”。
2b Complete the sentences（6~7 min）
【教师活动】T: Complete the sentences with the words in the box: product, corn, bridge, wide, capital. Read the context before choosing the word.
【学生活动】Ss: 学生完成句子：1-wide, 2-bridge, 3-capital, 4-corn, 5-product，并用其中一两个词造句。
【过渡语】Now we will use some of these words to understand a passage about Saihanba.
【知识点】词汇运用策略：根据句子语境判断词义和词性。
2b选词填空与造句活动截图
2b原题 答案
The road used to be narrow and dirty. Now, it is ______ and clean. wide
The ______ made it convenient for the villagers to travel across the river to the city. bridge
Beijing, China’s ______, hosted the 2008 Summer Olympics and the 2022 Winter Olympics. capital
Our farm has a lot of laying hens. They feed on ______, vegetables, and insects. corn
A digital ________ is something you sell online and doesn’t have a physical form. product
判断技巧：选词填空时先看空格前后搭配：capital常表示“首都”，product常表示“产品”，wide常与road/river等名词搭配。
Step 3 Practice（操练巩固：2c语篇填空+阅读问答+语言点）（15~20 min）
3a Watch and complete 2c（6~7 min）
【教师活动】T: Watch and read the passage about plete the passage with the correct forms of the words: government, bush, sandstorm, result, sandy, soil.
【学生活动】Ss: 学生完成填空：sandy, soil, sandstorms, government, bushes, result，并能复述Saihanba过去环境恶劣、后来植树造林、如今成为green miracle。
【过渡语】This passage tells a powerful story of environmental change.
【知识点】2c语篇主线：1962年sandy lands和sandstorms → government support和workers’ hard work → green miracle。
Watch and answer导入截图
2c塞罕坝语篇填空截图
2c语篇空格 答案
from their house in Chengde to the ______ lands of Saihanba sandy
There were few trees to hold the ______ together soil
there were often ___________ sandstorms
With support from the ____________ government
workers planted ______ and trees bushes
This is the ______ of hard work and people working together result
重点强调：Saihanba is known as “the green miracle” because people changed sandy lands into the world’s biggest man-made forest through hard work and teamwork.
3b Read and answer（5~6 min）
【教师活动】T: Read again and answer: What was Saihanba like in 1962 What’s it like now Why is it called the green miracle What can we learn from it
【学生活动】Ss: 学生回答：It was sandy with few trees. Now the land is covered with green trees and the water is clean and fresh. We learn that hard work, determination and teamwork can solve environmental problems.
【过渡语】These answers help us move from facts to values.
【知识点】阅读理解：从过去、现在、原因、启示四个角度理解Saihanba变迁。
Saihanba过去与现在阅读问答截图
green miracle原因与启示问答截图
Further thinking环境改善案例截图
问题 参考答案
What was Saihanba like in 1962 It was sandy with few trees. The soil couldn’t be held together, so there were many sandstorms. Winters were below freezing and life was very hard.
What’s Saihanba like now The land is covered with green trees and the water is clean and fresh.
Why is Saihanba called “the green miracle” Because it used to be a sandy wasteland with no life, but now it is covered with green trees and clean water. This transformation is like a miracle.
What can we learn from Saihanba With hard work, determination and teamwork, we can solve serious environmental problems and create a better world.
Can you think of another environmental improvement in China The Three-North Shelterbelt Forest Program or the improvement of air quality in Beijing.
3c Language Point 1: capital（2~3 min）
【知识点】capital可表示“首都、资本、大写字母”，常见搭配有capital city, capital letter。
【教师活动】T: In the sentence Beijing, China’s capital, hosted the Olympics, what does capital mean
【学生活动】Ss: It means the capital city of China.
【过渡语】Now let’s learn product.
capital语言点讲解截图
3d Language Point 2: product（2~3 min）
【知识点】product为名词，表示“产品”；produce为动词“生产”；production为名词“生产”；productive为形容词“多产的”。
【教师活动】T: What is a digital product
【学生活动】Ss: It is something sold online without a physical form, such as an e-book.
【过渡语】Now compare wide and narrow.
product语言点讲解截图
3e Language Point 3: wide（2~3 min）
【知识点】wide表示“宽的、广泛的”，反义词为narrow，名词为width，可搭配wide river, wide knowledge。
【教师活动】T: The road used to be narrow and dirty. Now it is wide and clean. What change do you see
【学生活动】Ss: The road becomes wider and cleaner, so travel is easier.
【过渡语】Let’s use these words in a quick check.
wide语言点讲解截图
易错提示：`wide` 是形容词，常修饰road, river, knowledge等；`width` 是名词，表示“宽度”。
Step 4 Production（拓展输出：合成词造句+Saihanba before and after）（5~8 min）
【教师活动】T: Choose one or two compound words and make your own sentences. Then describe Saihanba before and after using the passage information.
【学生活动】Ss: 学生造句：A sandstorm can make the sky orange. A highway makes travel faster. Saihanba used to be sandy with few trees, but now it is covered with green trees.
【过渡语】Your sentences connect word formation with environmental change.
【知识点】输出要求：使用合成词和Saihanba关键信息描述变化。
合成词小结截图
Step 5 Summary & Homework（总结与作业）（2~3 min）
【教师活动】T: Let’s finish the multiple-choice word practice and summarize compound words, Saihanba changes and language points.
【学生活动】Ss: 学生完成选词填空：wide, product, capital, soil, sandstorm，并总结本课重点词汇和表达。
【过渡语】Please write compound words and describe Saihanba after class.
【知识点】总结：合成词构词法、Saihanba绿色奇迹、capital/product/wide语言点。
选词填空课堂检测截图
课堂检测原题 答案
The river is very ______ (wide / bridge), so we need a boat to cross. wide
A _________ (capital / product) is something you buy or sell, like a phone or a book. product
Beijing is the ______ (corn / capital) of China. capital
After the storm, the ______ (soil / bush) was full of water. soil
A ___________ (sandstorm / greenhouse) can make the sky turn orange and reduce visibility. sandstorm
【教师活动】T: Homework: Write 5 compound words related to nature or environment and use each in a sentence. Draw a before and after picture of Saihanba and write 3 sentences describing the change.
【学生活动】Ss: 学生记录作业，明确要写5个自然或环境相关合成词，并用3句话描述Saihanba变化。
Homework作业截图
二、板书设计（三栏式）
Key Vocabulary（重点词汇） Word Formation（构词法） Useful Expressions（重点句式）
sandstorm; highway; farmland; railroad
product; corn; bridge; wide; capital
government; bush; sandy; soil; result Compound words:
sand + storm → sandstorm
high + way → highway
farm + land → farmland
rail + road → railroad The road used to be narrow and dirty.
Now it is wide and clean.
Saihanba is known as the green miracle.
The land is covered with green trees.
Language points:
capital city / capital letter
product / produce / production
wide / narrow / width Saihanba then:
sandy lands; few trees; sandstorms; below freezing
Saihanba now:
green trees; clean and fresh water With hard work, determination and teamwork, we can solve serious environmental problems and create a better world.
课堂检测：wide, product, capital, soil, sandstorm Further thinking:
Great Green Wall
air quality improvement in Beijing Homework:
5 compound words + sentences
before-and-after picture of Saihanba
三、教学反思
1. Warm-up是否有效激活学生对sandstorm、farmland、soil等环境词汇的已有认知？
2. 合成词定义讲解是否让学生理解两个独立词组合形成新词的规律？
3. 2a配对活动中，学生能否准确构成sandstorm、highway、farmland、railroad？
4. 学生是否能举出eggplant、pineapple、firefly、scarecrow等更多合成词？
5. 2b选词填空是否帮助学生在语境中区分wide、bridge、capital、corn、product？
6. 2c语篇填空中，学生能否根据Saihanba上下文选择sandy、soil、sandstorms、government、bushes、result？
7. 阅读问答是否帮助学生清楚比较Saihanba在1962年和现在的环境差异？
8. 学生是否理解green miracle背后的hard work、determination和teamwork？
9. capital、product、wide三个语言点是否能通过例句迁移到课堂检测？
10. Homework是否能促使学生把合成词构词法和Saihanba变化表达结合起来？

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