Unit 7 What's the highest mountain in the world?第3课时 Grammar Focus-【木牍教育】2024-2025学年八年级英语下册同步教学优质课件（人教版）

英语 RJ 八年级 下册 木牍教育-教学设计中心 制作 ※ 建议使用WPS2019打开。 人教八年级下册 Unit 7 Grammar Focus Unit 7 What’s the highest mountain in the world? By the end of the class, you will be able to Objectives 1. Curriculum word: ocean 2. Expression: the Pacific Ocean 3. Grammar: ① 大数字的表达和读法； ② 形容词副词的比较级和最高级 课时A计划 Can you translate the following sentences? 长江大约长6,300千米。 The Yangtze River is about 6,300 kilometers long. 黄河长5,464千米。 The Yellow River is 5,464 kilometers long. Warming up 课时A计划 明朝的长城大约有8,850千米长。 The Great Wall in Ming dynasty is about 8,850 kilometers long. 珠穆朗玛峰高8,848.86米，所以攀登起来很危险。 Qomolangma is 8,848.86 meters high and so is very dangerous to climb. 课时A计划 What’s the highest mountain in the world? Qomolangma. How high is Qomolangma? It’s 8,848.86 meters high. It’s higher than any other mountain. Which is the deepest salt lake in the world? The Caspian Sea is the deepest of all the salt lakes. Did you know that China is one of the oldest countries in the world? Yes, I did. It’s much older than the US. Find the comparatives and superlatives. 此句型用比较级表达最高级含义 Grammar focus 课时A计划 形容词和副词通常有三种级别： 原级（Positive form）：没有比较含义，“……”； 比较级（Comparative form）：两者间比较，“更……”； 最高级（Superlative form）：三者及三者以上比较，“最……”。 注意：某些形容词和副词只用原级，如：perfect，excellent，dead等。 课时A计划 形容词和副词的比较级用于两者之间的比较, 表示“较…...”或“更……一些”；形容词和副词的最高级用于三者或三者以上的人或物之间的比较，表示“最……”形容词最高级前一般要加定冠词the，副词最高级前的the可以省略。 语法概述 形容词和副词的比较级和最高级 课时A计划 1. 规则变化 单音节和部分双音节词 多音节词和部分双音节词 一般在词尾直接加 er或-est 以e结尾的，加-r或 -st 以“辅音字母+y”结尾的，改y为i加-er或-est 重读闭音节以一个辅音字母结尾的，双写这个辅音字母后加 -er或-est 在单词前加 more构成比较级，加most构成最高级 long→longer→longest nice→nicer→nicest heavy→heavier→heaviest big→bigger→biggest beautiful→more beautiful→most beautiful 一、比较级和最高级的构成 课时A计划 2. 不规则变化 原级 比较级 最高级 good/well many/much bad/badly little far better best more most worse worst less least farther/further farthest/furthest 课时A计划 修饰比较级的词： much，far，a lot，a bit，a little，a little bit, even (口诀：三多三少一甚至) 二、比较级的用法 1.用法：用于比较两个事物，标志词为than。 句型：主语＋be动词＋比较级＋than＋宾语 eg：He is shorter than me. 课时A计划 2.比较级中的替代问题 在比较级中，为了避免重复，常用that(单数)或those(复数)代替前面出现的名词。 课时A计划 比较级 可数名词单数和不可数名词用that代替 翻译：哈尔滨的天气比北京冷。 The weather in Harbin is colder than that in Beijing. 复数名词用those代替 翻译：第二小学的教师比第一小学的教师年轻。 The teachers in No.2 Primary School are younger than those in No.1 Primary School. 课时A计划 比较级 3.用比较级表示最高级 【同一范围内比较】 比较级＋than＋any other＋可数名词单数 =比较级+than the other+可数名词复数 【不同范围内比较】 比较级＋than＋any＋可数名词单数 课时A计划 比较级 eg：New York is bigger than any other city in America. 纽约比美国其他任何一个城市都要大。 (纽约和美国的其他任何城市都在美国这个范围内) Shanghai is bigger than any city in Japan. 上海比日本任何一个城市都要大。 (上海和日本的城市不在一个国家的范围内) 课时A计划 4.比较级句型 ①比较级＋and＋比较级：越来越…… 翻译：地球正变得越来越暖和。 The earth is getting warmer and warmer. ②the＋比较级，the＋比较级：越……，越…… eg：The more she thought about it，the more depressed she felt. 比较级 课时A计划 1.用法：用于三者或三者以上事物比较，后面通常用of/in来表示比较的范围（in加地点 of加群体）。 eg：Jason is the tallest in our class. Jim lives the farthest from school of all my classmates. 三、最高级的用法 课时A计划 注意： 形容词最高级前面必须加定冠词the； 副词最高级前面可加可不加。 最高级前有物主代词、名词所有格等修饰时，其前不加the eg：Lily is the best singer in our school. Tom lives farthest from here among us. The Yangtze River is China’s longest river. 课时A计划 最高级 2.最高级句型 ①the + 序数词 + 最高级 + 名词单数 翻译：黄河是中国的第二长河。 The Yellow River is the second longest river in China. 课时A计划 ②one of the +形容词的最高级+可数名词复数： 最……的……之一 翻译：重庆是我们国家最大的城市之一。 Chongqing is one of the biggest cities in our country. 课时A计划 ③. the + 序数词 + 最高级 + 可数名词单数 + in/of 短语 该结构意为“……在……中是第几……的……” eg. China is the third largest country in the world. 课时A计划 ④. Which/Who … + 最高级, A, B or C? 该结构意为“A，B，C中，哪个/谁最……？” eg.Which is the biggest, Beijing, Shanghai or Guangzhou? 课时A计划 4a Fill in the blanks with the correct forms of the words in the box. 1. The Amazon River is one of the _________ rivers in the world. It’s a little ________ than the Yangtze River. 2. Qomolangma is 8,848.86 meters _______. It’s one of the most __________ places for serious mountain climbers. 3. No ocean in the world is as ________ as the Pacific Ocean. 4. Although Japan is _______ than Canada, it is ________ smaller. big much popular long old high longest longer high popular big older much 课时A计划 4b Write two comparisons about two topics. Write true facts. e.g. Two rivers: the Yangtze River and the Amazon River The Yangtze River is almost as long as the Amazon River. The Amazon is longer than the Yangtze, but the Yangtze is the longest river in China. 课时A计划 Two cities: ________________ and _______________ ________________________________________________ ________________________________________________ ________________________________________________ Two animals: ________________ and _______________ ________________________________________________ ________________________________________________ ________________________________________________ Singapore Kuala Lumpur Kuala Lumpur is as modern as Singapore. Singapore is bigger than Kuala Lumpur and has a larger population than Kuala Lumper. Rabbit Snail A rabbit is bigger than a snail. A snail is a lot smaller than a rabbit, and it runs much slower than a rabbit. 课时A计划 4c Write five questions using comparisons. Then ask your partner your questions. 1. _____________________________________________________ 2. _____________________________________________________ 3. ____________________________________________________ 4. ___________________________________________________ 5. ____________________________________________________ What is the highest building in our city? What is the busiest subway station in our city? What is the largest shopping mall in our city? Which is the biggest park in our city? Which is the longest road in our city? 课时A计划 Homework Finish the task in KESHI A JIHUA. 课时A计划 $$