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形容词和副词的比较级与最高级，课堂导入结合自然奇观主题，从定义出发，通过“原级-比较级-最高级”脉络，以规则变化、用法结构（如两者比较“比较级+than”、三者比较“the+最高级+of/in”）及特殊句式（“the+比较级，the+比较级”等）为学习支架，帮助学生逐步构建知识体系。 其亮点在于融合自然奇观、学科情境（如海洋深度、公园面积）设计实例，通过“比较级+than any other”等结构培养语言能力，结合课堂练习（填空、短文填空）和作业（词汇卡片、描述差异）提升思维品质与学习能力。学生能在真实语境中运用语法，教师可借助系统支架与多样化练习提高教学效率。

UNIT 4 The Wonders of Nature Grammar Focus Grammar: Use comparative and superlative forms of adjectives and adverbs correctly (e.g., closer, louder, most amazing). 01 Master number expressions and geography-related words (e.g., waterfall, experience, rush). 02 Reading: Understand a descriptive passage and extract key details about a natural wonder. Speaking: Create and ask comparison questions (e.g., What is the highest ...?). 03 Learning Objectives 1.什么是形容词比较级与最高级？ 用来修饰名词的形容词，会因为修饰程度不同而有所“比较”。比较可依程度分为“原级”“比较级”及“最高级”三种。 small smaller smallest 比较级(用于两者之间的比较) ①形容词比较级＋than... He is taller than me. 他比我高。 ②the+比较级, the +比较级 越……，就越…… The more careful you are, the fewer mistakes you will make.你越仔细，犯的错误就越少。 Grammar 形容词和副词的比较级和最高级 最高级(用于三者或三者以上的比较)： ①the+形容词的最高级＋of/in... He is the tallest of the three. 他是这三个人中最高的。 He is the funniest in his class. 他是他们班最有趣的。 比较级(用于两者之间的比较) ③比较级+and+比较级 more and more+原级 The weather is getting colder and colder.天气越来越冷了。 Our hometown is becoming more and more beautiful.我们的家乡变得越来越美丽。 Grammar 形容词和副词的比较级和最高级 越来越…… 2.形容词比较级与最高级的变化方式 short 形容词的变化方式，可分为规则变化与不规则变化两种： 多数单音节形容词比较级在原级词尾加er，最高级在词尾加est 1.规则变化 shorter shortest young younger youngest 最高级(用于三者或三者以上的比较)： ②one of the+形容词最高级+可数名词复数 ＋of/in... ……中最……的……之一 Pingyao Ancient City is one of the best-kept ancient cities in China. 平遥古城是中国保存最完好的 古城之一。 形容词比较级与最高级的变化方式 nice 形容词的变化方式，可分为规则变化与不规则变化两种： 词尾为e的形容词比较级词尾加r，最高级词尾加st 1.规则变化 nicer nicest large larger largest 用英语写出这些数字。(6分) 1. Last month, our school held a book sale, and more than 2,000 (________________________) students took part in the activity. 2. We sold 36,772 (______________________________________________) books in total during the sale. two thousand thirty-six thousand seven hundred and seventy-two 最高级(用于三者或三者以上的比较)： ③Which/Who ...+(the) +最高级, A, B or C ? Who sings the best in your class, Lily, Tom or Jack?你们班谁唱的最好， 莉莉、汤姆还是杰克？ 2.形容词比较级与最高级的变化方式 lazy 形容词的变化方式，可分为规则变化与不规则变化两种： 词尾为辅音+y的形容词，比较级将y改i，再加er,最高级将y改i，再加est 1.规则变化 lazier laziest early earlier earliest 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 3. The activity raised five hundred and twenty thousand five hundred (____________________) yuan for children in poor areas. 4. We spent two hundred and thirty thousand (______________________) yuan buying new chairs and desks for the school. 520,500 230, 000 最高级用于三者或三者以上（人或物）的比较，表示“最……”,基本结构: the + 最高级 (+ of / in) ... 。 ① Qomolangma is the highest mountain in the world. ② The Sahara is the biggest desert in the world. 形容词和副词的最高级 ③ The Caspian Sea is the deepest of all the salt lakes. ④ The Nile is the longest river in the world. ⑤ China is the biggest country in Asia. ⑥ The Yangtze River is the longest river in Asia. ⑦ She plays volleyball (the) best in her class. “the+比较级…, the +比较级… ”意为 “越……，越……”。 The higher you climb a mountain, the thinner the air becomes. 你爬山爬得越高，空气就变得越稀薄。 * “比较级 + than any other + 单数可数名词 + 其他” 表示“比其 他任何一个……都……”。该结构可与“the+最高级”相互转换。 Qomolangma is higher than any other mountain in the world. = Qomolangma is the highest mountain in the world. 珠穆朗玛峰比世界上其他任何山峰都高。( = 珠穆朗玛峰是世界上最高的山峰。) * “比较级 + and + 比较级” 表示“越来越……”。 ① The earth is getting warmer and warmer. 地球变得越来越暖和。 ② Wind blows up bags higher and higher in the sky. 风把袋子吹得越来越高。 * “the + 序数词 + 最高级 + 单数可数名词 + in …” 表示“是…… 中的第几……”。 The Amazon is the second longest river in the world. 亚马逊河是世界上第二长的河流。 * “one of the + 形容词最高级 + 复数名词” 表示“最……之一”。 She is one of the best tennis players in the world. 她是世界上最好的网球运动员之一。 “比较级+and+比较级”意为“越来越……”。 当形容词或副词为多音节词或部分双音节词时，用“more and more+形容词/副词原级”结构。 Because of climate change, our earth is getting warmer and warmer. 由于气候变化，我们的地球正变得越来越暖和。 The Internet is becoming more and more important in our daily life. 互联网在我们的日常生活中变得越来越重要。 “主语+谓语动词+the+比较级+of the two...”意为“……是两者之中较……的那个”，是特指的情况。 Amy is the taller of the two girls. 埃米是两个女孩中较高的那个。 根据汉语意思完成句子，每空一词。 1．【学科融合】海洋中最深的地方是马里亚纳海沟。 The in the ocean is the Mariana Trench. 2．这个公园总面积有500平方米。 This park of 500 square metres. deepest point has a total area （1）比较的对象必须一致，为避免重复，常用that/one 或those/ones代替前面的名词。 High-speed trains are much faster than traditional ones. 高速列车比传统的列车快很多。 3．就我记得的，我们下周要进行一场数学测试。 I remember，we will have a maths test next week. 4．实验课上我们不能靠近火源。 We can't the fire in the lab class. 5．那座山的山顶终年积雪。 There is snow the mountain all year round. As far as go close to at the top of （2）在上文意思明确的情况下，可以单独使用“a/an+比较级+one”，意为“又一/再一更……的……”。 The sweater is a little bit short. Pass me a longer one, please. 这件毛衣有点短。请递给我一件长点的。 （3）比较级前可用much，a lot，a little，a bit，even，far等修饰，用来加强语气或表示程度。 The river is much deeper than that one. 这条河比那条河深得多。 阅读下面短文，用括号内所给单词的正确形式填空。 Our planet is full of amazing natural wonders.Mount Qomolangma is 1. (high) mountain on Earth，while the Mariana Trench is 2. (deep) than any other place in the ocean.Some animals also show special abilities.The cheetah runs 3. (fast) than all land animals，and the Arctic tern(北极燕鸥) makes 4. (long) migration (迁移) journey of any bird—flying over 70，000 kilometres yearly! the highest deeper faster the longest 一、用括号内所给单词的正确形式填空。 1．The more friends you have，the (happy) you will feel. 2．There are as (many) students in our class as in their class. 3．Who can solve this maths problem (quickly) in our class? happier many (the) most quickly 课堂练习 Homework 1．Make a vocabulary card for comparative and superlative forms，and exchange and fill in the comparative forms with your classmates.Then check it. 2．Describe the differences between two natural wonders in five sentences， using at least three superlative adjectives.　 $