Unit 4 The Wonders of nature Section A Grammar Focus 4a-4d课件 2025-2026学年人教版八年级英语下册

该初中英语课件聚焦形容词、副词比较级和最高级用法及大数字表达，以“World Travel Guide”引入世界自然奇观，通过圈划比较级任务感知语法，再以河流长度比较示例搭建从实例到规则的学习支架，梳理知识脉络。 其亮点在于融合语言能力、文化意识与思维品质，用马里亚纳海沟深度、尼罗河长度等实例练语法，结合巴彦淖尔地图开展小组活动，化身推荐官介绍家乡景点增强家国情怀。采用任务驱动和思维导图总结，学生提升语言运用与逻辑思维，教师可高效落实语法教学与素养培养。

Unit 4 The Wonders of Nature Section A Grammar focus 4a-4d 课型：语法课 主讲人：五原县第三中学 齐 悦 能够复习并巩固形容词、副词比较级和最高级的用法，总结积累事物对比的语言结构；梳理英文大数字表达方法，理解其表达特点；掌握询问地理事物高度、长度、深度、面积及地理之最的问答句型。（学习理解） 01 能够运用形容词、副词比较级、最高级与大数字，口头描述、对比世界自然奇观，在情境表达中熟练运用目标语言结构。（应用实践） 02 能够化身家乡文旅推荐官，运用所学语言介绍、对比巴彦淖尔各地特色景观；感受自然之美，产生对大自然的热爱与敬畏，增强家乡自豪感。（迁移创新） 03 Learning Objectives Hello, I’m your World Travel Guide. Let’s enjoy some natural wonders in the world. 4a Read the sentences. Circle the adjectives which compare things. Underline the adverbs which compare actions.. the Yangtze River 长江 6300 km the Amazon River 亚马逊河 6440 km the Nile 尼罗河 6670 km long longer longest The Amazon River is longer than the Yangtze River. The Nile is longer than the Amazon River. The Nile is the longest of all. 概念理解 比较级：_____者比较。 最高级：_____者或_____者以上比较。 两 三 三 1.比较级和最高级的基本概念 概念：用来修饰名词的形容词或者修饰动词的副词，会因为修饰程度不同而有所“比较”，可分为原级，比较级（更......）与最高级（最......）。 2.比较级和最高级的构成 long longer longest 1. 一般在词尾加-er，-est。 2. 以不发音的e结尾加-r，-st。 3. 以重读闭音节结尾， 双写尾字母，再加-er，-est。 4. 以辅音字母加y结尾的， 变y为i再加-er，-est。 5.多音节和部分双音节词， 词前加 more， most。 nice nicer nicest big bigger biggest heavy heavier heaviest famous more famous most famous river scenery lake snow mountain 规则变化 2.比较级和最高级的构成 原级 比较级 最高级 good / well many / much bad / badly little (少) old far 不规则变化 better best more most worse worst less least older/elder oldest/eldest farther/further farthest/furthest 3.最高级常见句型 基本结构：the +最高级 + in/of... “......中最......” 例1 Qinghai Lake is the largest saltwater lake in China. The Yangtze River travels (the) farthest in China. 例2 The Mariana Trench is the________ (deep) point in the ocean. 练 deepest It’s about 4,650 square kilometres in size. It’s about 6,300 kilometres long. It’s about 11,000 metres deep. thousand million 1.从数字的右端向左数，每三位数加一个逗号。 2.从右向左，第一个逗号处读thousand（千），第二个逗号处读million（百万），第三个逗号处读billion（十亿）。 3.读数时，通常在hundred后加and；若百位数为0，则在thousand后加and。 4.英语中无直接表示“万”和“亿”的单位词，需用thousand和million表达，如“一万”是ten thousand、“一亿”是one hundred million。 较大数字的表达与读法 9，365,278,689 billion one of the +形容词最高级 + 复数名词“最……的……之一” The Great Barrier Reef is one of the______________(beautiful) places to visit. 练 Mount Qomolangma is one of the greatest wonders of the world. 例 最伟大的奇观之一 most beautiful It’s about 8,848.86 meters high. the +序数词(first除外)+形容词最高级+单数名词“第几最……的” The Yellow River is the second longest river in China. 例 The Yangtze River is _________ (three) longest river in the world. 练 the third It’s about 5,464 kilometres long. Which / Who...+the+最高级, A, B or C? “哪一个/谁最……，A、B还是C?” Which mountain is the highest , Mount Tai, Mount Huang or Mount Hua? 例 Who climbed ____________(fast), Tom, Peter or Mike? 练 (the) fastest 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. Write or spell out the numbers. 4b 5,895 乞力马扎罗山 25,768 /ˈkjuːbɪk/ adj. 立方的 /maɪl/ n. 英里 因加瀑布 东非大裂谷 塔克拉玛干沙漠 three hundred and thirty-seven thousand four thousand I can Stars 复习并巩固形容词和副词的最高级的用法 了解地理之最，能使用形容词和副词的最高级,较大数字表达并描述自然景观，对大自然的神奇产生热爱与敬畏。 Let’s visit Victoria Falls together! 4c Complete the passage with the correct forms of the words in the box. large 　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 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! largest closer louder far most amazing n.池塘 ......远至（某处） Hi, welcome to my hometown, Bayannur. I’m your Bayannur local travel guide. Group work As Bayannur local travel guide ,write some questions to compare places. A: What is the biggest lake in Bayannur? B:... C:Which place do you like best, A, B or C? Why? D:... I can Stars 能使用形容词和副词的最高级对比巴彦淖尔的自然奇观 了解 巴彦淖尔之最，能使用较大数字表达并描述自然景观，热爱家乡，推广家乡美景。 Homework 基础作业 拓展作业 实践作业 运用思维导图总结归纳形容词、副词比较级、最高级变化规则，熟练认读、书写地理相关大数字。 运用比较级、最高级以及大数句型，仿写5个句子，描述世界自然景观的高度、长度、深度与面积。 化身巴彦淖尔小小文旅推荐官，用3–5句英文介绍家乡一处特色景点，灵活运用本课语法结构，下节课课堂展示分享。 Reflection How well can you do these things? Very well OK Needs work 1. I can use comparatives and superlatives to talk about natural wonders. □ □ □ 2. I can read and write big English numbers correctly. □ □ □ 3. I can finish the passage and make comparisons in sentences. □ □ □ 4. I can ask and answer questions to compare different places. □ □ □ Thank you for listening $