Unit4 The Wonders of Nature SectionA 3a-4d 课件2025-2026学年人教版英语八年级下册

该初中英语课件围绕“自然奇观”主题，核心涵盖形容词副词原级、比较级、最高级及大数表达，通过黄河、长江、尼罗河的对话阅读（3a）引入，结合表格填空（3b）梳理地理事实，搭建由语境理解到语法学习再到应用（角色扮演3c、短文填空4c）的学习支架。 其亮点在于融合语言能力与文化意识，如借“母亲河”等词汇渗透黄河对中华文明的意义，培养家国情怀，通过对话分析（3b表格）和比较等级练习（4a）提升思维品质。听力活动（3c）与角色扮演增强语言应用，作业设计（复述课文、单词默写）助力学习能力。学生能在真实语境中掌握语法，教师可依托结构化练习提高教学效率。

Unit 4 The Wonders of Nature Section A (3a-4d) 学 习 目 标 In this unit ,you will 1. talk about geography facts about natural wonders . 2. compare facts about famous places . 3. share geography facts using large numbers . 4. explore how and why people conncet with nature . 3a Read the conversation and underline the three rivers mentioned. 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 Africa? 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 by all means. 欢迎回来 顺便说一下 母亲河 当然可以 What do Yaming and Ella know about these rivers? Read the conversation again and complete the table. 3b River Country Length Importance Yellow River ____________ ____________km helped in the development of ancient ___________ NileRiver ____________ ____________km 5,464 6,671 civilizations to develop in China in Egypt The Yellow River is 5,464 kilometres long and is the second longest. 5,464 kilometres long 5464公里长 the second longest 第二长的 Yangtze River is about 6,300 kilometres long . Yes,it's 6,671 kilometres long 级别 定义 常用标志词 / 结构高频 例句 原级 描述 “单个事物的特征”，或 “两者同等程度” as + 原级 + as（和…… 一样）；not as/so + 原级 + as（不如……） He is tall.（描述单个特征） She runs as fast as me. （两者同等） This book is not so nteresting as that one. （两者不同等） 比较级 ...得多表示 “两者之间的比较”，强调 “更……” than（比）；much/even/a little（修饰比较级，表程度） Tom is taller than Jim.（两者身高对比） This bag is much heavier than that one.（much 修饰比较级，表 “…… 最高级 表示 “三者及以上比较”，强调 “最……” the + 最高级；in/of（表比较范围，如 in our class、of the three） He is the tallest in our class.（班级里三者以上比较） This is the most delicious food of all.（所有食物中比较） 形容词和副词的原级、比较级、最高级 good/well better best 好的 / 好地 bad/badly worse worst 坏的 / 坏地 many/much more most 许多 little less least 少的 far farther/further farthest/furthest 远的（farther 表距离，further 表程度） old older/elder oldest/eldest 老的 older 表年龄，elder 表辈分，如 elder sister 姐姐） 形容词和副词的原级、比较级、最高级 不规则变化 好坏多少是元（远）老 原形 比较级 最高级 By the way,do you know why it's called the Yellow River? By the way 顺便说一下 用于引入补充信息或转换话题的过渡短语 例句： By the way, have you seen my keys? （对了，你看到我的钥匙了吗？） We should protect them by all means. by all means 当然可以 表达强烈许可或鼓励的短语，正式场合也可译为"务必"。 例句： By all means take the day off if you're unwell. 如果身体不适，请务必休假） Listen to the conversation.Then role-play it. 3c Welcome back,Ella!How was your trip? It was great! 。。。 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...? Read the sentences.Circle the adjectives which compare things.Underline the adverbs which compare actions. 4a What is the biggest desert in the world? It is the Sahara Desert. How big is it? It is about 9,000,000 square kilometres in size. Where is the deepest point in the ocean? It is in the Mariana Trench. How deep is it? It is about 11,000 metres deep. Some blind animals can"see"as well as others. Mount Qomolangma is still growing taller. The Yangtze River travels the farthest in China and is about 6,300 kilometres long 在尺寸上/在大小方面 多大 多深 和...一样 Write or spell out the numbers. 4b 1.Mount Kilimanjaro is______ (fivethousand,eighthundredandninety-five)metres high. 2. _________ (twenty-fivethousand,sevenhundredandsixty-eight)cubic metres of water pours down Inga Falls each second. 3.The East African Rift Valley is about ________(four thousand)miles long. 4.The Taklimakan Desert has a total area of about _________(three hundred and thirty - seven thousand )square kilometres. 5,895 25,768 4,000 337,000 立方米 每一秒 平方千米 英语数字的读法遵循三位一组的规则，从右向左依次为thousand（千）、million（百万）、billion（十亿）等。具体规则如下： 数字英语 读法 0-19：直接读，如 zero, one, two。 整十数（20-90）：如 twenty, thirty。 两位数（21-99）：如 twenty-one, thirty-five。 三位数（100-999）：如 one hundred, two hundred and twenty-five。 四位数及以上：以 thousand, million, billion 为单位分段读， 如 1,234,567 读作 one million two hundred (and) thirty-four thousand five hundred (and) sixty-seven。 Complete the passage with the correct forms of the words in the box。 4c large scary amazing far close loud My friends and I visited Victoria Falls in Africa last year.Visiting one of the world's ______________waterfalls was a magical experience.As we went__________to the falls,the noise of the water slowly grew________ and____________.Then, right before our eyes,the waterfall appeared.It went on for as ________as the eye could see.Later,we sat in a special pool at the top of the falls.There, we felt the water rush past us and become a part of the waterfall.It was the __________but also the___________experience of our trip! ...之一 largest closer louder louder far scariest most amazing Write some questions to compare places.Then ask a partner your questions. 4d ●What is the highest...? ●Which park is bigger,...or...? 1.珠穆朗玛峰是世界上最高的山峰。 Mount Qomolangma is the_______________mountain in the world. 2.撒哈拉沙漠大约有九百万平方千米大。 The Sahara Desert is about 9,000,000 square_______________insize. 3.死海的表面在海平面以下416米。 The__________of the Dead Sea is 416 metres below sea level. 4.长江是中国最长的河流。 The Yangtze River is the_______________river in China. 5.我们应该尽可能的保护这些河流。 We should protect these rivers_______________. 重点句子翻译填空（5个） highest kilometers surface longest by all means 用所给词的适当形式填空（每空1分，共5分） 1.The Great Barrier Reef is one of the most amazing________（nature）wonders in the world． 2.We should take action to protect the________（danger）animals fromd is appearing． 3.The cave________（form）millions of years ago and has become a popular scenic spot． 4.We were________（amaze）by the wonderful views of the natural奇观during the trip． 5.The government is trying to reduce environmental________（pollute）to protect nature． natural dangerous formed amazed pollution Homework 1, 熟读新词汇并默写四会单词 2，练习册本节课练习题 3，复述课文 $