Unit 4 Section A 3a -3d 课件2025- 2026学年人教版八年级英语下册

Section A 3a-3d Unit 4 The Wonders of Nature What is amazing about nature? 1 Learning Objectives 能够理解对话发生的背景、主要内容和相关细节信息。 能够分析对话中信息推进的逻辑，以及人物互动延续对话的技巧。 能够与同伴分角色表演对话，体会对话人物的情感态度，并做到语音、语调正确，语流自然。 能够与同伴合理接续对话，运用比较级和最高级、大数字以及跨学科知识交流中外地理知识。 能够理解河流对国家文明的形成和发展的历史作用，正确看待人与自然的关系，树立环保意识，坚定文化自信。 In this lesson, we will be able to: 1. Master new words and phrases: waterfall, civilization, at all costs, development, and review related river knowledge. billion 十亿 million 百万 thousand 千 point 点 Can you read the number? one billion, four hundred and eleven million, seven hundred and seventy eight thousand, seven hundred and twenty-four point seven eight 根据中国国家统计局发布的第七次全国人口普查数据（2020年），以及后续的年度人口变动情况抽样调查数据： 中国总人口约为 14.1178 亿人 2 小数点读“point” ； 3 从左到右读数，每隔三位按百位数读； 4 百位和十位之间加and，若十位为0，and不省略 5 小数点后面的数只读数字，不读数位。 3 - What is the highest mountain in the world? - It’s ____________________! - How high is it? - It’s ____________ metres high. Mount Qomolangma 8848.86 - What is the biggest desert in the world? - It’s ____________________! - How big is it? - It’s ____________ square kilometres in size. Sahara Desert 9,000,000 Look and answer Miss Liu A moment with the river of history. 📍 Egypt ❤Teacher Li , Emma, Peter, Mary, Cheng Li, Grace, Uncle Wang What kind of natural wonder can you see in the video? Can you name the river? What do you know about it? I can see a river. It’s the Nile River. It is in Africa. It’s about 6,671 kilometers long and is the longest river in the world. It is very important in Egypt’s history and helped the development of ancient civilization. Location Length Importance /ˈiːdʒɪpt/ /dɪˈveləpmənt/ n.发展;壮大 /ˌsɪvəlaɪˈzeɪʃn/ n.文明 Do you know any other famous rivers in China or in the world? What do you know about them? Lead in Look and say What do you see in the video? Is it a lake or a waterfall? A waterfall. Do you know which river this waterfall is on? The Yellow River. What do you know about the Yellow River? What do you think Ella and Yaming will talk about? 7 Let’s listen and choose. 1. Where did Ella go on her trip? A. The Yangtze River. B. The Yellow River. C. The Nile. 2. What is the conversation mainly about? A. The Yangtze River. B. The Yellow River. C. Great rivers. 1.What rivers are mentioned in the conversation? They are the Yellow River, the Yangtze River, and the Nile River. 2.Does Ella know much about Chinese rivers at the beginning? How do you know? No, she doesn't. She thought the Yellow River might be the longest. 3a Read the conversation and underline the three rivers mentioned. Skim reading 3. Why is the Yellow River called “yellow”? Because some parts carry brown and yellow earth. Read again and answer the questions. 4. What do the Nile and the Yellow River have in common? They helped ancient civilizations develop and are still very important today. 5. Why do people call the Yellow River the “mother river” in China? Because it helped ancient Chinese civilizations to develop and is still very important to people today. 10 Read and complete River Country Length Importance Yellow River _________ _______ helped in the development of ancient ____________ Nile River _________ _______ China Egypt 5,464 civilizations 6,671 Do you think rivers are important to us? We should protect them at all costs. A. no matter what it takes B. at all times C. at all risks What should we do? Deep thinking 1. Why are rivers very important to people? 2. What will happen if we don’t protect our rivers? - They give us water to drink and use. - They help plants and animals live. - They are important for our life and civilization. - The water will be dirty and not safe to drink. - Fish and other animals will die. - We will lose our clean water and beautiful nature. 3. As students, what small things can we do to protect our rivers and nature? - We should not throw rubbish into rivers. - We should save water in our daily life. - We can tell our family and friends to protect nature, too. Yaming: Welcome back, Ella! How was your trip? Ella: It was great! We saw the Hukou Waterfall on the Yellow River. Is that the longest river in China? Yaming: No, the Yangtze River is the longest river in China. It travels the farthest and is about 6,300 kilometres long. The Yellow River is 5,464 kilometres long and is the second longest. By the way, do you know why it's called the Yellow River? Ella: Because it's yellow? Yaming: Right. Some parts of the river carry brown and yellow earth. Ella: That's interesting! I like learning about rivers. My favourite is the Nile. Did you know it's the longest river in the world? Yaming: Yes, it's 6,671 kilometres long. It's very important in Egypt's history. Ella: That's right. Both the Nile and the Yellow River helped ancient civilizations to develop. And they're still very important today. Yaming: Yes. In China, we even call the Yellow River our "mother river"! Ella: We should protect them at all costs. 3c Listen to the conversation. Then role-play it.  Checklist Stars Speak fluently and clearly ☆☆☆☆☆ Beautiful pronunciation and tones ☆☆☆☆☆ Facial expressions and body  language ☆☆☆☆☆  Full of emotion ☆☆☆☆☆ Yaming: Welcome back, Ella! How was your trip? Ella: It was great! We saw the Hukou Waterfall on the Yellow River. Is that the longest river in China? Yaming: No, the Yangtze River is the longest river in China. It travels the farthest and is about 6,300 kilometres long. The Yellow River is 5,464 kilometres long and is the second longest. By the way, do you know why it's called the Yellow River? Ella: Because it's yellow? Yaming: Right. Some parts of the river carry brown and yellow earth. Ella: That's interesting! I like learning about rivers. My favourite is the Nile. Did you know it's the longest river in the world? Yaming: Yes, it's 6,671 kilometres long. It's very important in Egypt's history. Ella: That's right. Both the Nile and the Yellow River helped ancient civilizations to develop. And they're still very important today. Yaming: Yes. In China, we even call the Yellow River our "mother river"! Ella: We should protect them at all costs. Analyze Greet Talk about ranking (排名) and length Lead into a new topic Talk about origin of name(名称由来) Talk about importance Protection 3d Imagine that you are Yaming or Ella. Continue the conversation with a partner about other geographical features in China. Ella: Could you tell me more about China, Yaming? Yaming: Sure! What would you like to know? Ella: What’s the biggest desert in China? Yaming: It’s the Taklimakan Desert. Ella: Do you know how big it is? Yaming: Yes, it has a total area of about 330, 000 square kilometres. 15 the biggest desert ► Taklimakan desert ► 330,000 square kilometres in size 5 greatest mountains in China Mount Tai; Mount Hua; Mount Heng (衡); Mount Song; Mount Heng (恒) the largest lake ► Qinghai Lake ► saltwater lake; ► 4,625 square kilometres. the largest island ► Taiwan; ► about 35,873 square kilometres the biggest national park ► Sanjiangyuan National Park (三江源国家公园) ► 363,000 square kilometres in size the biggest waterfall ► Huangguoshu Waterfall ► 77.8 metres high and 101 metres wide. the names of China’s seas? ► Bohai Sea; Yellow Sea; East China Sea; South China Sea ► 4, 700,000 square kilometres in total. the largest freshwater lake ► Poyang Lake; ► 3,500 square kilometres; ► bird paradise (候鸟天堂) 功能 英文句型 表达兴趣 That's interesting!/Wow!/Amazing!/Cool! 表达惊讶 Really?/Are you serious? 请求更多信息 Could you tell me more about it? /What else do you know? 追问细节 How high/long/big is it?/Where is it? 转换话题 What about...?/Do you know anything about...? 表达感受 I'd love to go there someday!/It sounds beautiful. Essential knowledge Lucid waters and lush mountains are invaluable assets. Yaming: Welcome back, Ella! How was your trip? Ella: It was great! We saw the Hukou Waterfall on the Yellow River. Is that the longest river in China? Yaming: No, the Yangtze River is the longest river in China. It travels the farthest and is about 6,300 kilometres long. The Yellow River is 5,464 kilometres long and is the second longest. By the way, do you know why it's called the Yellow River? Ella: Because it's yellow? Yaming: Right. Some parts of the river carry brown and yellow earth. 欢迎回来 你的旅行怎么样？ 中国最长的河流 流经距离最远 第二长的 顺便问一下  do you know why...? 你知道为什么……吗？ 携带棕黄色的泥土 Ella: That's interesting! I like learning about rivers. My favourite is the Nile. Did you know it's the longest river in the world? Yaming: Yes, it's 6,671 kilometres long. It's very important in Egypt's history. Ella: That's right. Both the Nile and the Yellow River helped ancient civilizations to develop. And they're still very important today. Yaming: Yes. In China, we even call the Yellow River our "mother river"! Ella: We should protect them at all costs. 世界上最长的河流 在埃及历史上 both A and B ……和……两者都 古代文明 help...to develop 帮助…发展 call...our "mother river" 把……称作我们的“母亲河” protect...at all costs 不惜一切代价保护…… Language points 教材 P34 3a 1. No, the Yangtze River is the longest river in China. 不，长江是中国最长的河流。 e.g. This is ___________________story of all. 这个是所有故事中最有趣的。 Eric works _______________in Class 1. 在一班埃里克学习最努力。 练习：Taiwan lies in the southeast of China and it is ________ island in our country. It is an inseparable (不可分离的) part of China. A. the largest B. larger C. large D. the larger A the most interesting (the) hardest 句型结构：主语+谓语动词（+the）+最高级（+名词）+in/of... ……在某一范围内或某类人或物中（是）最……（的……） 这是最高级的常用结构之一，副词最高级前的the可以省略。 23 Language points 教材 P34 3a 2. It travels the farthest and is about 6,300 kilometres long. 它流经的距离最远，约有6300千米长。 6,300 kilometres long “6300千米长”, 是“基数词＋单位词＋形容词”结构。 (当基数词大于1时，单位词要用复数形式) 物体长、宽、高、深等的表达法 基数词+单位词+形容词 （long、wide、high、deep等） 基数词+单位词+in+名词 （length、width、height、depth等） 练习：The river is 20 metres wide ( = 20 metres __________ )． 这条河宽20米。 The desks in our classroom are 1.5 metres long ( = 1.5 metres __________ )． 我们教室的桌子长1.5米。 in width in length 24 Language points 教材 P34 3a 3. The Yellow River is 5,464 kilometres long and is the second longest. 黄河全长5464公里，是中国的第二长河。 e.g. Sam is ________________boy in his class. 萨姆是他班里第二高的男生。 练习：—The Yangtze River is the ________ longest river in the world. —Yes, only after the Nile River and the Amazon River. A. three B. third C. four D. fourth B 句型结构：主语+be动词+the+序数词+形容词最高级（+名词+in/of...） ……是（某一范围内或某类人或物中）第……（的……） the second tallest 25 Language Points 4. Both the Nile and the Yellow River helped ancient civilizations to develop. 尼罗河和黄河都促进了古代文明的发展。 Both you and she are students. The students play both on the playground and in the classroom. Both of the boys are from the village. Both of us prefer smooth music. (1) both...and... …和…都；既…又… 连两个对等的成分，连接两个成分作主语时，谓语动词用复数形式。 (2) both 两个/两个都<--> neither"两者都不" ① 形 both +可数ns ② 代 both of+代词/both of+the/限定词+可数ns +谓复 注意: both常位于连系动词be/助动词/情态动词之后，实义动词之前。 教材 P34 3a Language Points 5.We should protect them at all costs. 我们应用一切办法保护它们。 我们必须不惜一切代价保护这些河流。 We must protect the rivers at all costs. 我们应该不惜一切代价保证安全。 We should keep safe at all costs. at all costs 不惜一切代价,无论如何 介词短语, 常位于句末,作状语 do sth at all costs 不惜一切代价做某事 must / should... at all costs 必须/应该不惜一切代价…… Language points 教材 P34 3b development develop (v.发展）+ -ment ==> development n.发展；壮大【不可n】 in the development of... 在……的发展过程中 (with) the development of（随着）······的发展 拓展：develop v. 发展；壮大 → developed adj. 发达的 → developing adj. 发展中的 6. helped in the development of ancient civilization 有助于古代文明的发展 With the _________ (develop) of his business, he helped more people. 父母对他们孩子的成长产生很大影响。 Parents make a big difference to their children’s _____________. China is a ___________（developing/developed）country. development 1. The __________（develop）of AI is very fast now. 2. 3. 翻译：教育的发展对国家至关重要。 development developing The development of education is crucial for a country. 28 desert 【名】 desert /'dezət/ 沙漠；荒原 (对比：dessert 名词（饭后）甜点,甜食”) 【动】 desert /dɪ'zɜ:t/. 抛弃；遗弃；擅离（职守） （1）Camels are called the “ships of the desert”. 骆驼被称为“沙漠之舟”。 （2）Never desert your friends in trouble. 永远不要在朋友困难时抛弃他们。 n. v. Language points 教材 P34 3d 7. What's the biggest desert in China? 中国最大的沙漠是什么？ Exercises 1. Of all the students, Lily lives the __________ (far) from the school. 2. This river is __________ (deep) than that one, so you should be more careful. 3. The teacher explained many different __________ (part) of the plant clearly to the students. 4. Our school is ____________ (develop) a new programme to help students with reading. 5. We would like __________ (visit) places with beautiful mountains and rivers. I. 用括号中所给单词的适当形式填空。 farthest deeper parts developing to visit 30 Exercises II. 根据汉语提示完成句子（每空一词）。 1. 你去上海的旅行怎么样，你去了什么地方？ _______ was your trip _______ Shanghai, and where did you go? 2. 顺便问一句，你有没有拍很多照片来纪念你的旅行？ _____ _____ ______, did you take many photos to remember your trip? 3. 这个公园以水闻名，所以被命名为水上公园。 The park is famous for its water, so it _______ _______ Water Park. 4. 他和他的姐姐都对古代建筑很感兴趣。 _______ he _______ his sister _______ interested in ancient buildings. 5. 我想通过阅读和旅行了解不同的中国文化。 I want _______ _______ _______ different Chinese cultures by reading and travelling. How to By the way is called/ is named Both and are to learn about /to know about 31 6. 这座古镇助力古代文明发展。 The old town helps _______ ___________ to develop. 7. 这栋公寓楼大约200米高。 This apartment building is about 200 ______ ______. 8. 鄱阳湖是中国第二大湖。 The Poyang Lake is ______ ______ ______ lake in China. 9. (学科融合) 世界上最大的沙漠是撒哈拉沙漠。 The ______ ______ in the world is the Sahara Desert. 10. 如果你需要任何帮助，务必告诉我。 If you need any help, tell me ______ ______ ______. ancient civilizations metres high the second largest biggest desert at all costs II. 根据汉语提示完成句子（每空一词）。 32 Summary We learn: 1. Vocabulary: waterfall, civilization, at all costs, development, and related geographical words. 2. Sentence Patterns: "Is ... the longest ... in ...?"; "It's ... kilometres long."; "We should protect ... at all costs." 3. Knowledge: The basic information of the Yellow River, Yangtze River and Nile, and Chinese geographical features. We can: 1. Understand a conversation about rivers and extract key details. 2. Role-play the dialogue and create new conversations about geographical features. 3. Express ideas about river protection with target words and phrases. 33 Homework 3. 拓展层：以 Protect Our Mother Rivers 为题，写一篇80词左右的英语短文，融入本节课所有生词。 Must-do Choose-to-do 1. 基础层：跟读并背诵3a对话，默写4个生词+短语。2. 提高层：完成3d对话续写，录制1分钟角色扮演视频，发送到班级群。 Lavf58.46.101 91011.68 Lavf58.20.100 $