Unit4 Grammar 课件 2025-2026学年人教版八年级英语下册

Grammar In this part, you will master the usage of comparative and superlative adjectives/adverbs to compare things and actions. be able to use comparative and superlative forms of some adjectives/adverbs and write some questions to compare places learn to read, write, and spell out large numbers correctly. Read the sentences. Pay attention to the numbers. 巧记基数词 基数词不难记， 找出规律更容易。 零至十二样各异， 一个一个单独记。 后加-teen变十几， thirteen、fifteen看仔细。 十八需要特殊记， eighteen只有一个t。 二十到九十加-ty， twenty、eighty重点记。 forty没有字母u， thirty、fifty更出奇。 写到几百几十几， and把百与十系。 巧学妙记加努力， hundred是你的好成绩。 在英语中，对于万以上的数字，我们该如何表达呢？这就要记住英语数字读法特点。以下面一个数字为例： 注意每三个数为一个单位，按照百、十、个向下读。 6 , 500 , 431 , 729 billion million thousand seven hundred and twenty-nine six billion, five hundred million, four hundred and thirty-one thousand, 大数字的表达方法 6 PART 1-2 100 260 487 1009 PART 1-3 1,600 2,070 54,986 系列 1 类别 1 类别 2 类别 3 4300 2500 3200 PART 1-3 Great 505,765 7,278,634 964,000 4b Write or spell out the numbers. P35 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 Complete the sentences with the correct forms of fast. 1 Bob came third in the race. He ran _____. 2 Sandy came second in the race. She ran _____ than Bob. 3 Anna came first in the race. She ran ___ ______. fast faster the fastest 副词的原级 副词的比较级 副词的最高级 有时我们对事物进行比较，还会用副词的比较级和最高级。 Anna Sandy Bob Watch and fill in the blanks with the proper forms of the adjectives. tall beautiful happy _____ __________ ______ ________ _________ ________ ________ ______________ 形容词的原级 形容词的比较级 形容词的最高级 对两者进行比较时，可以用形容词的比较级形式来表达。 比较三个或三个以上的事物，可以用形容词的最高级形式来表达。 4a Read the sentences. Circle the adjectives which compare things. Underline the adverbs which compare actions. P35 adjectives adverbs 1. 同级比较 基本结构as ... as ... 意为“和……一样”。 ① Peter is as tall as Tom. 一、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. 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。 二、形容词和副词的比较级 * “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 + 比较级 + …, the + 比较级 + …” 表示“越……， 越……”。 ① The busier he is, the happier he feels. 他越忙越高兴。 ② The faster you run, the harder you breathe. 你跑得越快，呼吸就越困难。 * “数词 + times + 比较级 + than” 表示“……是……的几倍”。 The elephant weighs ten times more than the panda. 大象的体重是熊猫的十倍。 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. 三、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 + 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。 4c Complete the passage with the correct forms of the words in the box. One word is used more than once. P35 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 ______. 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 _______ but also the _____________ experience of our trip! large scary amazing far close loud largest close louder louder far scariest most amazing 4d Write some questions to compare places. P35 ● What is the highest ...? ● Which park is bigger, ... or ...? ● What is the longest river in Asia? ● Which desert is larger, the Sahara or the Gobi? ● What is the biggest province in China? ● Which city is more crowded, Beijing or Chengdu? ● ... Then ask a partner your questions. 规则变化 原级 比较级 最高级 单 音 节 词 tall tallest nice nicer big biggest 双音节词 happy happier 多音节和部分双音节词 important more important taller nicest bigger happiest the most important 一般的单音节词在词尾加-er或-est 以不发音的e结尾的词只加-r或st 以重读闭音节结尾，且词尾只有一个辅音字母的，双写这个辅音字母，再加-er或-est 以辅音字母加y结尾的词，改y为i, 再加-er或-est more/most + 形容词原级 比较级/最高级的构成方式 原级 比较级 good/well bad/badly far better worse farther/further 不规则规则变化： little many/much less more 最高级 best worst farthest/furthest lest most 单项选择。 1. The National library of China is _____ public library in Asia. [2025年 北京市] A. large B. larger C. largest D. the largest 2. Lingling is one of _____ students in my class. She is always ready to help. [2025年 天津市] A. helpful B. more helpful C. less helpful D. the most helpful 直击中考 3. AI technology in China has developed ______ than anyone expected. [2025年 福建省] A. fast B. faster C. fastest 4. Mount Gongga is the ____ mountain in Sichuan, higher than any other in this area. [2025年 成都市] A. high B. higher C. highest 根据句意，用括号内所给单词的适当形式填空。 1. From the 1400s to the 1800s, winters in the northern half of the earth were ______ (cold) and longer than they are now. [2025年 天津市] 2. She helps them to make _______ (much) money than before. [2024年 新疆] colder more 1. I felt much _____ after I told the problems to my close friend. A. good B. well C. better D. best 2. There was a big fire yesterday. _____, no one was hurt. A. Luckily B. Loudly C. Angrily D. Badly 3. The boy broke the record. He runs ______ than anyone else in his school. A. fast B. faster C. fastest D. the fastest Ⅰ. 单项选择。 4. Bob knows how to cut the cost of the project. I'm sure he can do the work with _____ money and _____ people. A. less; less B. fewer; more C. more; fewer D. less; fewer 5. My time in the middle school was one of _____ periods of my life. A. exciting B. more exciting C. the more exciting D. the most exciting Ⅱ. 用括号内所给单词的适当形式填空。 1. — Our class did well in the school singing competition. — Yes, you sang ___________________ (beautifully) of all. 2. WeChat is growing fast and it has been _____________ (popular) than QQ in recent years. 3. The mobile phone with 5G can send videos much ______ (fast) than with 4G. 4. My father always tells me that the more I help others, the _____________ (happily) I will live. 5. Cindy, it's time to practise the violin. The ______ (much) you practise, the ______ (well) you'll play. (the) most beautifully more popular faster more happily more better 1. Can you identify and use comparative and superlative adjectives/adverbs in sentences? 2. Can you read, write, and spell out large numbers accurately? 3. Can you complete passages with correct comparative/ superlative forms of some adjectives/adverbs and write questions to compare places? 缺音频 没有答案 You must do: Recite the new words and phrases. You choose to do: Find two places (e.g., parks, mountains, lakes) and write a short paragraph comparing them using comparative and superlative forms of some adjectives/ adverbs. $