Unit 4 Section A Grammar Focus 课件 2026-2027学年人教版英语八年级上册

Unit 4 Amazing Plants and Animals Section A Grammar Focus 学习目标 通过语法表格，掌握最高级的内容； 能熟练使用最高级谈论神奇的动植物。 Lead-in What does this video talk about? World’s Records 3 The blue whale is the largest and the heaviest animal in the world. The biggest land animal in the world is the African elephant. The cheetah runs the fastest among all land animals. I think the most useful plant in the world is bamboo. It is perhaps the most interesting plant in the world. Translate all the sentences. 新课讲授 4 Read the sentences and notice the words in bold. The blue whale is the largest and the heaviest animal in the world. The biggest land animal in the world is the African elephant. The cheetah runs the fastest among all land animals. I think the most useful plant in the world is bamboo. It is perhaps the most interesting plant in the world. 最高级 the superlative adjective 形容词 adverb 副词 3a Which parts of speech (词性) have superlative forms? 5 What are the ways to form a superlative adjective or adverb? Do you know the rules? 是否是规则变化 The blue whale is the largest and the heaviest animal in the world. The biggest land animal in the world is the African elephant. The cheetah runs the fastest among all land animals. I think the most useful plant in the world is bamboo. It is perhaps the most interesting plant in the world. 音节 6 The blue whale is the largest and the heaviest animal in the world. The biggest land animal in the world is the African elephant The cheetah runs the fastest among all land animals. I think the most useful plant in the world is bamboo. It is perhaps the most interesting plant in the world. 双音节heavy最高级 双音节useful的最高级 单音节large最高级 单音节big最高级 单音节fast最高级 三音节interest的最高级 (1) 规则变化 构成方法 原级 最高级 单音节词和部分双音节词 一般情况下，最高级词尾加-est tall; short; fast tallest；shortest；fastest 以字母e结尾的词，最高级词尾加-st large; late largest；latest 重读闭音节词尾只有一个辅音字母时，先双写该辅音字母，然后最高级词尾加-est big; fat; thin biggest；fattest；thinnest 以“辅音字母+ y”结尾的双音节词，先把y改为i，然后最高级词尾加-est easy; heavy; early easiest；heaviest；earliest 多音节词和部分双音节词 词前加most构成最高级 beautiful; popular most beautiful；most popular 形容词和副词的最高级的构成 (2) 不规则变化 原级 最高级 例句 good(形容词) / well(副词) best She is the best student in the class. He plays the piano best among us. bad(形容词) / badly(副词) worst This is the worst movie I've ever seen. She performed worst in the competition. many(形容词) / much(副词) most This is the most interesting book I've read. She works most efficiently in the team. little(形容词/副词 ) least He has the least experience in this field. She speaks English the least fluently among us. far(形容词/副词 ) farthest (具体距离的远近) The moon is the farthest celestial body we can see. furthest (抽象意义的深远) She has thought furthest about the future of AI. 最高级规则变化口诀 单音节，真容易，词尾常加 est； 词尾带个哑音 e，直接加 st 就可以； 重读闭音一辅音，辅音双写再加 est； 辅音跟着 y，y先变 i 再加 est； 多音节，有妙招，most 前面罩； 特殊变化单独记，最高级里辨清晰。 Summary Pay attention to the red words The blue whale is the largest and the heaviest animal in the world. The biggest land animal in the world is the African elephant. The cheetah runs the fastest among all land animals. I think the most useful plant in the world is bamboo. It is perhaps the most interesting plant in the world. Yes！ 最高级有范围？ 11 形容词和副词的最高级的用法 1. 表示三者或三者以上(人或事物)的比较，其中有一个在某一方面超过其他几个，后面可用带有in、of、among的短语等来说明比较的范围。形容词最高级的前面一般要加定冠词the，副词最高级前的the可以省去。 例如：①The blue whale is the largest and heaviest animal in the world. ②In my country, July is the hottest month of the year. ③The cheetah runs (the) fastest among all land animals. 某一范围内的比较用in 同一类事物范围内的比较用of 副词最高级前的the可以省去哦 例如：This is my worst performance. She is Lucy’s best friend. 记住: 如果最高级前有形容词性物主代词或名词所有格等修饰语时则不再用定冠词the。 2.最高级的常用结构 (1) the + 形容词或副词最高级 + in / of 短语 ……中最……的 例如：Tom is the tallest in his class. Tom runs (the) fastest of all the students. (2) 序数词与最高级结合 例如：The Yangtze River is the third longest river in the world. (3) one of the + 形容词或副词最高级 +名词复数 表示“最……之一” 例如：Beijing is one of the largest cities in the world. (4) 特殊疑问句中的最高级 例如：Which animal jumps the highest, the lion, the monkey, or the tree frog? Who is the kindest person in your family? (5) 比较级表达最高级的含义 例如：Julia is taller than any other girl in her class. =Julia is the tallest girl in her class. Complete the sentences with the superlative forms of the words in brackets. 1. Among all animals, I love pandas the best. I think they are _________ (cute) animals in the world. 2. Which do you think is __________________ (beautiful), the rose, the peony, or the lotus flower? 3. Look at that butterfly! It has ________________ (colourful) wings. 4. Which animal jumps ___________ (high), the lion, the monkey, or the tree frog? 5. The elephant birds were ___________ (large) and ___________ (heavy) birds ever on earth. Some could stand up to three metres tall and weigh up to 860 kg. the cutest the most beautiful the most colourful (the) highest the largest heaviest 3b 15 Complete the passage with the superlative forms of the words in the box. ancient beautiful common good popular The ginkgo tree is one of ________________ living trees on earth. Ginkgo trees first appeared over 200 million years ago. Chinese people love the ginkgo, as it is a symbol of hope and long life. Many Chinese believe that the old ginkgo tree in the Zhongnan Mountains in Shaanxi Province is ________________. Thousands of tourists come to see it each year, especially in mid-October, as it is ____________ time to see it. The ginkgo tree is one of _________________ trees in streets, parks, and gardens across China. When autumn comes, one of ________________ activities is to take a walk under ginkgo trees. People believe the bright yellow leaves can bring joy to their heart. the most ancient the most beautiful the best the most common the most popular 3c What’s amazing about the ginkgo tree? Ginkgo trees first appeared . It is one of ________________ living trees on earth. People think the old ginkgo tree in the Zhongnan Mountains in Shaanxi Province is ________________. It is one of________________trees in streets, parks and gardens across China. Chinese people love the ginkgo, as it is a symbol of _______________. People believe the bright yellow leaves can ___________________. the most ancient the most beautiful the most common hope and long life bring joy to their heart over 200 million years ago. New words land; African; rose; peony; lotus; butterfly; wing; frog; weigh; kg; ginkgo; province; take a walk the superlatives Grammar (1) 形容词和副词一般具有最高级结构 (2) 最高级的构成：①单音节、双音节、多音节；②规则变化和不规则变化 (3) 最高级的用法：①表示三者或三者以上(人或事物)的比较； ②最高级的常用结构 课堂总结 当堂检测 1.Which color do you like ________ (well), white, blue or green? 2.I think Blue Light is one of the ________ (bad) restaurants in our town. 3.The third ________(long) river in the world is the Yangtze River. 4. AI is one of the ____________(amazing) inventions. I think it will change the world. 5.When Helen won a prize in the English competition, she believed she was the (happy) girl in the world. best worst longest most amazing happiest 一、用所给词的适当形式填空。 销售额 1 2 3 4 25 40 15 20 The Yangtze River is________________river in the world. (第三长河） 2. The Atlantic is __________________ ocean in the world. ( 第二大洋） 3. Lin Sen is _______________________ in the class because he never gets to school on time. （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 third longest the second biggest 二、完成句子。 当堂检测 销售额 1 2 3 4 25 40 15 20 三、语法填空。 当堂检测 China is an amazing country. It has the world’s _______ (high) mountain. The Yangtze River is its _______(long). Pandas are the ___________ (famous) of all the animals in our country. The Silk Road is the _______(old) trading road to the world. When we plan a trip, making choices doesn’t mean to choose the _________(good) or the _______________(expensive) one, but the __________ (proper) one. best most expensive most proper highest longest most famous oldest 销售额 1 2 3 4 25 40 15 20 $