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Unit 4 Amazing Plants and Animals — Section B (2a~2d) 学案
—— 词汇与语篇课：构词法与青蛙生态
2026-2027学年 人教版八年级上册
班级 姓名
学号 日期
课题 Unit 4 Section B (2a~2d): 词汇与语篇课 — 构词法与青蛙生态
板块一：课前预习 Pre-class Preview
词汇预习表
请预习以下单词和短语，写出中文释义：
单词/短语 词性 中文释义（预习填写）
action n.
kindness n.
reality n.
connection n.
communication n.
goodness n.
appearance n.
imagination n.
popularity n.
importance n.
disappointed adj.
构词法预习
请写出以下单词加后缀后的名词形式：
act → ________ kind → ________ real → ________ connect → ________
communicate → ________ good → ________ appear → ________
imagine → ________ popular → ________ important → ________
板块二：课堂探究 Class Exploration
2a 找出不同类的词
Circle the odd ones in each group and give your reasons.
(根据课堂PPT内容完成)
Group 1: ________________________ Reason: ________________________________
Group 2: ________________________ Reason: ________________________________
Group 3: ________________________ Reason: ________________________________
2b 后缀构词法
Add the endings -ance, -(t)ion, -ness, -ity to form nouns. Write the noun forms:
act → ________ kind → ________ real → ________
connect → ________ communicate → ________ good → ________
appear → ________ imagine → ________
popular → ________ important → ________
Exercises 构词法填空
Complete the sentences with the correct forms of the words in 2b:
1. Will time travel ever become a _______
2. Don't judge a person by their ___________ ; true beauty is inside.
3. Her ________ shows in small things, like sharing snacks with friends.
4. The police took immediate _______ to catch the thief after the robbery.
5. Children's ___________ makes them believe toys can talk and trees can dance.
6. We should teach kids the _________ of saving water.
7. Students should know the _________ between habits and health.
8. The new coffee shop's _________ grew quickly because of its special drinks.
9. Clear ______________ between parents and children helps reduce misunderstanding.
10. A stranger's _________ — giving me an umbrella on a rainy day — made me feel warm.
Vocabulary Practice 词汇运用
Fill in the blanks with the correct form of the given words:
1. I felt ____________ when my favourite flowers died.
2. After the rain, some mushrooms _________ in the garden.
3. In my hometown, people often use bamboo baskets to _______ food.
4. What did you put in your luggage It __________ a ton.
5. I can't __________ my life without my pets. They mean a lot to me.
2d 语篇填空（青蛙主题）
Read the passage and fill in the blanks:
"You may not realize it, but frogs play an important role in our _________ ecosystem. The smallest frogs are about the size of a pea, while larger ones can grow as big as a human hand. Many people know that frogs help to __________ farms by eating insects. __________, not everyone understands their __________ in nature. Frogs can live on __________ and in water. Because of this, they are popular subjects in studies on climate change and the ecosystem."
Retell the passage
Use these key words to retell: play an important role in / the smallest...while... / however / live on land and in water / because of this
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
板块三：课堂练习 Class Practice
I. 用所给词的正确形式填空（构词法练习）
1. Will time travel ever become a _______
2. Don't judge a person by their ___________ ; true beauty is inside.
3. Her ________ shows in small things, like sharing snacks with friends.
4. The police took immediate _______ to catch the thief after the robbery.
5. Children's ___________ makes them believe toys can talk and trees can dance.
6. We should teach kids the _________ of saving water.
7. Students should know the _________ between habits and health.
8. The new coffee shop's _________ grew quickly because of its special drinks.
9. Clear ______________ between parents and children helps reduce misunderstanding.
10. A stranger's _________ — giving me an umbrella on a rainy day — made me feel warm.
II. 语篇填空（2d）
"You may not realize it, but frogs play an important role in our _________ ecosystem. The smallest frogs are about the size of a pea, while larger ones can grow as big as a human hand. Many people know that frogs help to __________ farms by eating insects. __________, not everyone understands their __________ in nature. Frogs can live on __________ and in water. Because of this, they are popular subjects in studies on climate change and the ecosystem."
III. Think and Discuss: What can we do to protect frogs
1. ____________________________________________________________________________
2. ____________________________________________________________________________
3. ____________________________________________________________________________
4. ____________________________________________________________________________
板块四：课后作业 Homework
1. 搜索阅读关于"构词法"的内容，记录5-10个常见后缀及其例词，下节课分享。
2. 在2d语篇后添加一个段落，进行读后续写（至少50词）。
3. 复习本课构词法规则和10个后缀派生名词。
4. 预习下一课时的内容。
板块五：参考答案
词汇预习表答案
action 行动 | kindness 善良 | reality 现实 | connection 联系 | communication 交流 | goodness 善良/美好 | appearance 外貌 | imagination 想象力 | popularity 流行/受欢迎 | importance 重要性 | disappointed 失望的
构词法预习答案
act → action | kind → kindness | real → reality | connect → connection
communicate → communication | good → goodness | appear → appearance
imagine → imagination | popular → popularity | important → importance
Exercises 答案
1. reality 2. appearance 3. kindness 4. action 5. imagination
6. importance 7. connection 8. popularity 9. communication 10. kindness
Vocabulary Practice 答案
1. disappointed 2. appeared 3. store 4. weighs 5. imagine
2d 语篇填空答案
1. planet's（地球的） 2. protect（保护） 3. However（然而） 4. importance（重要性） 5. land（陆地）
复述参考答案
Frogs play an important role in our planet's ecosystem. The smallest frogs are about the size of a pea, while larger ones can grow as big as a human hand. Many people know that frogs help to protect farms by eating insects. However, not everyone understands their importance in nature. Frogs can live on land and in water. Because of this, they are popular subjects in studies on climate change and the ecosystem.
Think and Discuss 参考答案
1. Don't catch or kill frogs.（不要捕捉或杀害青蛙——青蛙是益虫，帮助农田消灭害虫）
2. Don't litter near ponds or rivers.（不要在池塘或河流附近乱扔垃圾——保护青蛙的栖息环境）
3. Spread the importance of frogs.（传播青蛙的重要性——让更多人了解青蛙的生态价值）
4. Call on more people to protect frogs.（呼吁更多人保护青蛙——集体行动力量更大）

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