Unit 4 The Wonders of Nature Section A Grammar Focus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人教版八年级下册Unit 4语法重点，系统讲解形容词副词比较级与最高级的构成（规则及不规则变化）和用法（原级、比较级、最高级），通过自然奇观问题（如撒哈拉沙漠、马里亚纳海沟）导入，构建从具体实例到抽象语法规则的学习支架。 其亮点在于融合主题情境与多元活动，用思维导图梳理知识体系，通过互动游戏（如“Who is the funniest in your class?”）、数字读写练习提升语言能力，结合自然奇观实例培养思维品质，助力学生主动建构语法知识，教师可高效开展情境化语法教学。

人教版八年级英语下册 Unit 4 The Wonders of Nature Section A Grammar Focus Review What is the ________ desert in the world? It’s the Sahara Desert. biggest Look and fill in the blanks. the Sahara Desert ①直接加 -er 或 -est tall—_____—______ long—______—______ ②以不发音的字母e结尾的单词直接加 -r 或 -st ③以“辅音字母+y” 结尾，把y变为i，再加 -er 或- est nice—______—______ heavy—________—________ taller tallest longer longest nicer nicest heavier heaviest 规则变化 形容词副词比较等级的构成 It’s about __________square kilometres in size. How big is it? 9,000,000 the Sahara Desert Where is the _______ point in the ocean? It’s in the Mariana Trench. deepest ④重读闭音节（末尾只有一个辅音字母） 双写辅音字母再加 -er或 -est ⑤部分双音节词和多音节词 分别在原级前加more构成比较级和most构成最高级 big—_______—_______ slowly—___________—___________ beautiful—______________—______________ bigger biggest more slowly most slowly more beautiful most beautiful 形容词副词比较等级的构成 规则变化 原级 比较级 最高级 good / well better best bad worse worst many/much more most little less least old older/elder oldest / eldest far farther (更远)/ further (进一步的) farthest / furthest 不规则变化 It’s about _______ metres deep. How deep is it? 11,000 What are the deep- sea animals like? Some animals are blind, but they can “see” as ____ as others. well 1. 同级比较 基本结构as ... as ... 意为“和……一样”。 ① Peter is as tall as Tom. 形容词和副词的原级 彼得和汤姆一样高。 他和他姐姐/妹妹一样努力工作。 ② He works as hard as his sister. 具体用法 用法 意义 原级 as +原级+as 表示“……和……一样” Lucy is as thin as Lily. notas/so+原级+as 表示“……不如……” Jerry is not as/so tall as Tom. 比较级二者之间 比较级+ than 表示“……比……更……” I’m older than her. 比较级+and +比较级 表示“越来越……” The weather is hotter and hotter. the +比较级,the + 比较级 表示“越……，越……” The more, the better. 、 比较级用于两者（人或物）之间，表示“其中一个比另 一个更……”或“较……”，基本结构：比较级＋ than。 ① China is much older than the United States. 中国比美国古老得多。 我们必须比从前更谨慎地工作。 ② We must work much more carefully than we did before. 强调比较级的比较程度或语气时，形容词比较级前面可以由much, even, far, a little, a bit, a lot等来修饰。 形容词和副词的比较级 Mount Qomolangma is one of the _______ wonders of the world, and it is still growing ______. greatest taller 1. The activity raised five hundred and twenty thousand five hundred (____________________) yuan for children in poor areas. 2. We spent two hundred and thirty thousand (______________________) yuan buying new chairs and desks for the school. 520,500 230, 000 3. We used the other 290,500 (______________________________________________) yuan to buy schoolbags and other school things for 3,550 (___________________________________) children. two hundred and ninety thousand five hundred three thousand five hundred and fifty 比较级和最高级的构成 比较级+than the+比较级，the+比较级 比较级的用法 规则变化、不规则变化 形容词和副词的比较级与最高级 比较级+and+比较级 more and more+形容词/副词原级 语法知识导图 最高级的用法 形容词和副词的比较级与最高级 (the+)最高级+in/of/among短语 one of the+形容词最高级+可数名词复数+in/of 短语 “Which/Who…(+the)+最高级，A, B or C?” 语法知识导图 用法 意义 最高级三者及以上 the +最高级（+名词）+ of/in 表示某一范围内“最……的” Alice is the tallest girl in her class. one of the +最高级+复数名词+of/in 表示某一范围内“最……的……之一” China is one of the biggest countries in the world. the + 序数词 + 最高级（+名词）+of/in 表示某一范围内“第几……的” The Yellow River is the second longest river in China. 比较级和最高级的构成 语法知识导图 比较级+than the+比较级，the+比较级 比较级的用法 规则变化、不规则变化 形容词和副词的比较级与最高级 比较级+and+比较级 more and more+形容词/副词原级 Read and guess. are ______ ______ ________ of all the animals in China. the most famous Pandas They are fat and cute, black and white. They only live in China and are more famous than any other animal to Chinese. People over the world love them and we’re doing our best to look after them. 语法知识导图 最高级的用法 形容词和副词的比较级与最高级 (the+)最高级+in/of/among短语 one of the+形容词最高级+可数名词复数+in/of 短语 “Which/Who…(+the)+最高级，A, B or C?” The mountain was not widely known until the Song Dynasty because it was hard to hike across it. The famous Ming Dynasty explorer Xu Xiake once said, “Only the gods can see all the wonders of Yandang Mountain.” Over the past hundreds of years, people have built many temples on the mountain. 33. ________These works include stone sculptures(雕塑), calligraphic tablets(书法碑刻)and paintings on the rocks. A. The temples are in different styles. B. The falls are divided into three levels by rock cliffs. C. The mountain is full of interesting natural sights. D. In autumn, wild geese(大雁)rest in the reeds around the lake. E. And many famous artists have left works here. F. The mountain is located in Wenzhou, Zhejiang Province. E friendly sing well hard-working popular thin talented smart funny A: Who is the funniest in your class? B: … A: Who is the thinnest in your class? B: I think … I want to know you! Let’s play a game! Think and guess. It begins at Chang’an. This is an old trading road. is the _______trading route in the world. The main product is silk. oldest The Silk Road Write or spell out the numbers. Mount Kilimanjaro is _______(five thousand, eight hundred and ninety-five) metres high. _______(twenty-five thousand, seven hundred and sixty-eight) cubic metres of water pours down Inga Falls each second. The East African Rift Valley is about 4,000 (____________) miles long. 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 Another well-known sight is Sanzhepu, or Three-Terraced Falls. 35. ________ They are some of the most special waterfalls on the mountain. A. The temples are in different styles. B. The falls are divided into three levels by rock cliffs. C. The mountain is full of interesting natural sights. D. In autumn, wild geese(大雁)rest in the reeds around the lake. E. And many famous artists have left works here. F. The mountain is located in Wenzhou, Zhejiang Province. B 积累 联系上文，完成知识积累。(8分) 1. be known as ________________(同义短语) 2. above sea level ______________(反义短语) 3. not...until ________________ 4. take...for example ________________ 5. look like ________________ be famous as below sea level 直到……才 以……为例 看起来像 较大数字的表达与读法 大于一千的基数词的表达法 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. 读的时候通常在hundred后加and，如果百位数为0， 则在thousand后加and。 4.英语中没有直接表示“万”和“亿”的单位词，而要用thousand 和million来表达，如“一万”用“ten thousand”、“一亿”用“one hundred million”。 2,674→two thousand six hundred and seventy-four 164,213,430→ one hundred and sixty-four million, two hundred and thirteen thousand, four hundred and thirty 18,357,089→ eighteen million, three hundred and fifty-seven thousand, and eighty-nine 5,204,000,000→five billion two hundred and four million Complete the passage with the correct forms of the words in the box. large amazing far close loud My 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 largest closer louder 1．The population of China is about 1,411,750,000. That is ________. A．one billion, four hundred and eleven million, seven hundred and fifty thousand B．one billion, and four hundred eleven, seven hundred and fifty thousand C．one billion, four hundred and eleven million, and seven hundred fifty thousand A $