Unit 4 Section A (4a-4d） (第3课时）-【绿卡初中创新题】2025-2026学年八年级下册英语同步课件(人教版·新教材) 安徽专版

该初中英语课件围绕“自然奇观”主题，聚焦相关词汇（如cubic, mile）、大数字英文表达及形容词/副词比较级、最高级用法。课堂通过Review环节的问答（如世界最大沙漠、海洋最深处等）复习旧知，搭建学习支架，引导学生从已知过渡到新句型和语法规则的学习。 其亮点是以自然奇观为主题语境，融合语法与词汇学习，通过4c短文填空、4d编比较问题等活动提升语言能力。大数字表达规则清晰（如三位分组、“万”用thousand表示），比较级最高级规则分类明确（如规则变化、不规则变化），培养学生思维品质和学习能力。学生能在真实情境中运用语言，教师可直接使用结构化活动提升教学效率。

Unit 4 The Wonders of Nature 第 3 课 时 （4a—4d） Section A What is amazing about nature? 2 单词：cubic，mile，pool 短语：cubic metre 句型：①What is the biggest desert in the world? ②How big is it? ③Where is the deepest point in the ocean? ④Mount Qomolangma is one of the greatest wonders of the world, and it is still growing taller. 能认读并书写与自然奇观相关的大数字，掌握大数字的英文表达规则。 能掌握形容词和副词的比较级、最高级以及同级比较的基本用法。 Learning Goals 1 2 3 Review —What is the ________ desert in the world? —It’s the Sahara Desert. biggest Look and fill in the blanks. the Sahara Desert 4 Review Look and fill in the blanks. the Sahara Desert —It’s about __________square kilometres in size. —How big is it? 9,000,000 5 Review Look and fill in the blanks. —Where is the _______ point in the ocean? —It’s in the Mariana Trench. deepest 6 Review Look and fill in the blanks. —It’s about _______ metres deep. —How deep is it? 11,000 7 Review Look and fill in the blanks. —What are the deep-sea animals like? —Some animals are blind, but they can “see” as ____ as others. well 8 Review Look and fill in the blanks. Mount Qomolangma is one of the _______ wonders of the world, and it is still growing ______. greatest taller 9 Review Look and fill in the blanks. The Yangtze River travels the _______ in China and is about 6,300 kilometres long. farthest 10 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. Read the sentences. Circle the adjectives which compare things. Underline the adverbs which compare actions. 比较 4a 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. What is the biggest desert in the world? Where is the deepest point in the ocean? 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. 最高级 在对比两者或两者以上的事物时，运用了形容和副词的哪几种形式？ 原级 比较级 high— higher low — lower deep —deeper 一般情况下，在词尾加-er large — larger fine — finer 以不发音字母e结尾的词，在词尾加-r heavy — heavier easy — easier early — earlier 以“辅音字母 + y”结尾的双音节词，先把y改为 i ,再加-er 形容词 / 副词比较级变化规则 big — bigger fat — fatter thin — thinner 重读闭音节词词尾只有一个辅音字母时，先双写该辅音字母，再加-er beautiful — more beautiful interesting — more interesting delicious — more delicious 多音节词和部分双音节词在词前加more 形容词 / 副词比较级变化规则 不规则变化 原级 比较级 good / well better bad / badly worse many / much more little less far farther further 比较级 (comparatives) fast short high light tall slow 直接加-est heavy easy happy hungry early funny 把y变i再加-est A B 形容词 / 副词最高级变化规则 large late nice 加-st big thin hot wet fat “双写”最后一个辅音字母再加-est C D useful interesting beautiful 在词前加 the most- E good / well bad / badly many / much little far best worst most least farthest / furthest E 形容词 / 副词最高级不规则变化 比较级常用句型： ①  A + be + 比较级 + than + B 表示“A比B更……”，是最基础的两者比较结构。 This apple is bigger than that one. 这个苹果比那个大。 ②  比较级 + and + 比较级 表示“越来越……”，强调程度逐渐变化。 The city is becoming more and more beautiful. 这座城市变得越来越美。 ③  The + 比较级 + of the two... 表示“两者中更……的那个”，比较级前需加定冠词the。 He is the taller of the two boys. 他是两个男孩中更高的那个。 19 最高级常用句型：  ① 主语 + be + the + 形容词最高级 + 表示范围的短语/从句 （说明在某一范围内“最……”） She is the tallest girl in our class. 她是我们班最高的女生。 ② 疑问词 + be + the + 最高级 + 范围，A, B or C? （用于选择疑问句，询问三者中“最……的是哪一个”） Which is the biggest, the sun, the moon or the earth? 太阳、月亮、地球，哪个最大？ ③ one of + the + 形容词最高级 + 可数名词复数（表示“最……之一”） Beijing is one of the most beautiful cities in the world. 北京是世界上最美丽的城市之一。 20 最高级常用句型： ④ the + 序数词 + 形容词最高级 + 名词（表示“第几最……的……”） The Yellow River is the second longest river in China. 黄河是中国第二长河。 ⑤ 比较级和最高级的转换 （1）A is + 比较级 + than any other + 单数名词 + in/of... A比范围内其他任何一个都…… Tom is taller than any other student in his class. （2）A is + 比较级 + than the other + 复数名词 + in/of... A比范围内其他所有都…… Tom is taller than the other students in his class. （3）最高级：A is + the + 最高级 + in/of... Tom is the tallest student in his class. 21 大额数字书写技巧： (1) 大额数字以“千（thousand）”“百万（million）”“十亿（billion）”为 递进单位，每三位为一组，用逗号分隔： • 千位：1,000（one thousand） • 万位：10,000（ten thousand） • 十万位：100,000（one hundred thousand） • 百万位：1,000,000（one million） • 十亿位：1,000,000,000（one billion） (2) 书写技巧：百位与十位之间有“and”连接；每三个数字为一个单位 22 5,764 five thousand, seven hundred and sixty-four 265,468 two hundred and sixty-five thousand, four hundred and sixty-eight 19,357,095 nineteen million, three hundred and fifty-seven thousand, and ninety-five 注意： （1）英语没有“万”这个单位，要表示“万”须借用thousand，如“一万”用“十个千（ten thousand）” 表示，“十万”用“百个千（one hundred thousand）”表示。 （2）在hundred 后通常加上连词and。若读数中百位数为0，则在thousand后加and。 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. 5,895 25,768 Write or spell out the numbers. 4b 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. four thousand 1 mile ≈ 1.609 kilometres three hundred and thirty-seven thousand Complete the passage with the correct forms of the words in the box. 4c largest closer louder far most amazing What is the highest...? Which park is bigger, ... or ...? 疑问词（组）+谓语动词+比较级，A or B? A和B，……更……？ Write some questions to compare places. Then ask a partner your questions. 4d A: What is the highest tower in China? B: It’s the Shanghai Tower. A: Which park is bigger, Hyde Park or Greenwich Park? B: Hyde Park. A: What’s the deepest lake in the world? B: It’s Lake Baikal. A: Which river is longer, the Yangtze River or the Nile River? B: The Nile River. Example: My sister is ________ than me. But my brother is the ________ in my family.（tall） 2. Taking a plane is the __________ （quick） way to get there. Do you agree with me? 3. Tom’s handwriting is ________ than mine. Lucy has the ________ handwriting in our class.（good） quickest better 一、用所给单词的适当形式填空。 Practice taller tallest best 二、试着写出下列各句中数字的读法。 1. The Eiffel Tower is about 330 metres tall. 2. The height of Mount Huangshan is about 1,864 metres. 3. The Great Wall of China is approximately（大约） 21,196 kilometres in length. three hundred and thirty one thousand eight hundred and sixty-four twenty-one thousand one hundred and ninety-six 31 3. Jack is _______________________ in the class. （最懒的学生之一） 4. Edison was _________________________ in the world. （最伟大的发明家之一） one of the laziest students one of the greatest inventors The Yangtze River is________________river in the world. （第三长河） the third longest 2. The Atlantic is __________________ ocean in the world. （第二大洋） the second biggest 三、 完成句子。 绿卡图书—走向成功的通行证 $