Unit 4 the wonders of nature SectionA 4a-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，核心涵盖比较级、最高级用法及大数字认读，通过复习中国地理数字事实（如长江长度、珠峰高度）衔接旧知，以自然奇观数据（乞力马扎罗山高度、刚果河流量等）为支架，构建从数字认读、语法复习到话题应用的学习脉络。 其亮点是以真实自然情境整合语言学习，4a分类形容词副词、4b填空短文等梯度练习提升语言能力，Pair work“大理Top3推荐”任务培养思维品质，“自然感悟”环节渗透尊重保护自然的文化意识。学生能在语境中运用语法，教师可借助结构化练习和话题任务提高教学效率。

SectionA(4a-4d) The Wonders of Nature Unit 4 行业PPT模板http:///hangye/ 行业PPT模板http:///hangye/ 单击此处编辑母版标题样式 单击此处编辑母版文本样式 单击此处编辑母版文本样式 二级 三级 四级 五级 1. review the usage of the comparatives and superlatives.(重点) 2. master the rules about how to read large numbers in English.（重点） 3. talk about more natural wonders and places using the target language.（重难点） IMG_3839 Let's review How to read large numbers? 20，264，141，040.112 Step1 ：从小数点开始从右往左，每3个数字加一个“ ，”形成分级单位 Step2：从右到左，小数点读“point”，第一个“,”读thousand(千)，第二个“,”读million(百万)，第三个“,”读billion(十亿)， Step3:从左往右读数，百位和十位之间加and,若十位为0,and不省略；若百位为0，thousand和十位之间加and,小数点后面的数字逐一读出。 billion million thousand twenty billion, two hundred and sixty-four million, one hundred and forty-one thousand, and forty point one one two 20264141040112 Large numbers Let's practice Write or spell out the numbers. 4b 1.Mount Kilimanjaro is __________ (five thousand, eight hundred and ninety-five) metres high. 2._________ (twenty-five thousand, seven hundred and sixty-eight) cubic metres of water pours down Inga Falls each second. 3.The East African Rift Valley is about 4,000 (_____________) miles long. 4.The Taklimakan Desert has a total area of about 337,000 (____________________________________) square kilometres. 5,895 25,768 four thousand three hundred and thirty-seven thousand IMG_3839 Do you know what these numbers are about? 6,300 8,848.86 11,000 9,000,000 6,300 8,848.86 11,000 9,000,000 six thousand three hundred eight thousand,eight hundred and forty-eight point eight six eleven thousand nine million Let's review the longest river travel the farthest in China the Yangtze River Mount Qomolangma the highest mountain is still growing taller Mariana Trench the deepest point in the ocean Sahara Desert the biggest desert in the world 1. Talk about geography facts size height length depth measurement 2. use different forms of adjectives and adverbs: Positives （原级） Comparatives （比较级） Superlatives （最高级） 此课件为蜗牛英语圈原创课件,已申请版权,侵权必究法律责任 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 deep-sea animals are blind, but they can “see” as well as others. Mount Qomolangma is one of the greatest wonders of the world, and it is still growing taller. The Yangtze River travels the farthest in China and is about 6,300 kilometres long. Read the sentences.Circle the adjectives which compare things. Underline the adverbs which compare actions. 4a adjectives adverbs Let's learn Positives Comparatives Superlatives 原级(同级比较)用法 肯定结构: A ... as + 原级 + as + B. A 和 B 一样…… 否定结构: A ... not as/so + 原级 + as + B. A 不如 B …… 1. 这个湖泊和这条河流一样清澈。 2. 这个湖泊不如海洋深。 The lake is as clean as the river. The lake is not as/so deep as the sea. Positives Comparatives Superlatives 比较级的用法 1. A ...比较级 + than +B . A 比 B 更…… 前提：表示“两者”之间进行比较 2. Which / Who + 谓语动词 + 比较级, A or B? A 和 B 中，哪一个/谁更…？ 3. The + 比较级 + 句子, the + 比较级 + 句子. 越……，就越…… 4. 比较级 + and + 比较级 / more and more + 原级 越来越…… 5. 比较级 + than any other + 单数名词 + 范围. 比较级 + than the other + 复数名词 + 范围. …比同一范围内其他任何一个都…(比较级表最高级) 6.常见的修饰比较级的词有much, a lot, a little, a bit, even, still, far等. Let's learn Positives Comparatives Superlatives 最高级的用法 1. the+ 最高级 + in/of/among 短语. 前提：表示“三者或三者以上”之间进行比较 2. one of the + adj.最高级 + 名词复数 3. the + 序数词 + adj.最高级 + 名词 单数 4. Which + 谓语动词 + (the) + 最高级, A, B or C? 1. 最高级前有名词所有格/物主代词修饰时，不加 the; 2. 副词最高级前 the 可加可省 5. 最高级前不用/可省 the 的情况 Let's learn 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 louder. 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 scariest but also the ________________ experience of our trip! Complete the passage with the correct forms of the words in the box. largest large　 amazing 　far　 close 　loud closer louder far most amazing one of the + 最高级+cn复数 went closer 走近 比较级+and+比较级 as +原级+as the+最高级+范围 How does the writer make the description vivid（生动的）? Let's practise 4c 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 louder. 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 scariest but also the ________________ experience of our trip! 4c Complete the passage with the correct forms of the words in the box. largest large　 amazing 　far　 close 　loud closer louder far most amazing Hearing(听觉) Sight(视觉) 它延伸得很远,一眼望不到边. Touch(触觉) Let's practise Make your own TOP 3 list about Dali. Pair work Rules: You must use comparatives(比较级) and superlatives（最高级） correctly. Nowadays,City Walk is a super popular way to explore a city. Today,you are City tour guides! You need to recommend the Top 3 in Dali to Ella. 此课件为蜗牛英语圈原创课件,已申请版权,侵权必究法律责任 It is joy with duty. Let's turn that feeling into action to . It is a window to see the world. It calls for humility. So we should . It's the wind,the soil,the open. So let's . enjoy nature respect nature protect nature What do the wonders mean to us? Deep thinking Summary Large numbers Positives Comparatives Superlatives 此课件为蜗牛英语圈原创课件,已申请版权,侵权必究法律责任 Exercise 1. Mount Qomolangma is one of the __________ (high) mountains in the world. 2. The Sahara Desert is much __________ (large) than any other desert in the world. 3. The noise of the waterfall grew __________ and __________ (loud) as we got closer. 4. The Yangtze River is __________ (long) than any other river in China. 5. Some deep-sea animals can “see” as __________ (good) as other animals, even though they are blind. highest larger louder louder longer well 用所给词的正确形式填空 $