Unit 4 Amazing Plants and Animals Section A 3a～3c） 课件-2025-2026学年人教版英语八年级上册

在这个广袤的地球上隐藏着许多奇迹，他们不仅仅是自然的杰作，更是人类梦想的象征。今天我们将带您探索那些令人叹为观止的世界之最。首先让我们攀登是世界之巅珠穆朗玛峰，他以8848.86米的微弱身子矗立在喜马拉雅山脉的心脏，吸引着无数探险者与登山爱好者。这里不仅是挑战自我的极限，更是人与自然和谐共处的典范。接下来我们将目光投向世界上最长的河流尼罗河，绵延6650公里，蜿蜒穿过北非的沙漠，滋养着两岸的文明。它是古埃及的生命线，也是无数历史故事的见证者。然后让我们领略世界最大的沙漠撒哈拉沙漠，面积近900万平方公里。这片被阳光照耀的黄沙海洋，隐藏着无数生命的奇迹，彰显着自然的力量与神秘。而在蔚蓝的海洋中生活着地球上最大的动物蓝鲸，它们可达30米以上，重达180吨，优雅的穿梭在深海，展示着生命的壮丽。与此同时，地球上最深的海洋马里亚纳海沟深达10994米，挑战了人类对极端环境的探索。这里是生物适应极端条件的奇迹，也是科学研究的宝贵前沿。最后目光投向世界上最长的人工结构。中国的万里长城纵横21196公里，承载着青年的历史与文化。这一伟大工程不仅是古代智慧的结晶，更是中华民族的象征。无论是巍峨的山峰、蜿蜒的河流、广袤的沙漠，还是深海与长城，这些世界之最都是人类探索自然、追寻梦想的壮丽篇章。让我们一起继续揭开他们的神秘面纱。 Unit 4 Amazing Plants and Animals 第3课时 Section A (Grammar Focus 3a-3c) R·八年级上册 Watch the video Lead-in What does this video talk about? World’s Records 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 3 Can you express these world’s records in one sentence? Mount Everest is the highest mountain in the world. The Nile River is the longest river in the world. The Sahara Desert is the largest hot desert in the world. Think and say The blue whale is the largest animal in the world. The Mariana Trench is the deepest place in the world’s oceans. The Great Wall is the longest man-made structure in the world. Can you express these world’s records in one sentence? The blue whale is the largest and 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. Read the sentences and notice the words in bold. What are the ways to form a superlative adjective or adverb? 3a Translate all the sentences. n. 陆地；土地 v. 降落；着陆 adj. 非洲的；非洲人的 n. 非洲人 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 6 Presentation The blue whale is the largest and 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. 形容词 副词 Read the sentences and notice the words in bold. What are the ways to form a superlative adjective or adverb? 3a Which parts of speech (词性) have superlative forms? 最高级 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 7 The blue whale is the largest and 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. 形容词 形容词 副词 形容词 形容词 形容词 The blue whale is the largest and 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. Presentation 音节 是否是规则变化 Read the sentences and notice the words in bold. What are the ways to form a superlative adjective or adverb? 3a Do you know the rules? 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 9 The blue whale is the largest and 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fast最高级 三音节interesting的最高级 单音节big最高级 不规则变化呢？ 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，在词尾加-est tall; short tallest; shortest 以字母e结尾的词，在词尾加-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，再在词尾加-est big; fat biggest; fattest 以“辅音字母+ y”结尾的双音节词，先把y改为i，再加-est easy; heavy easiest; heaviest 多音节词和部分双音节词 在词前加most beautiful; popular most beautiful；most popular 规则变化 形容词和副词的最高级的构成 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) He threw the ball farthest in the competition. furthest (抽象意义的深远) She has thought furthest about the future of AI. 不规则变化 Presentation 最高级有范围？ The blue whale is the largest and 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! Read the sentences and notice the words in bold. What are the ways to form a superlative adjective or adverb? 3a Pay attention to the red words. 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 13 in + 范围 This is the biggest city in China. He was the youngest player in the team. of + 具体成员/同类事物 She is the most talented of all the students. This apple is the sweetest of the five. 表示 “在……范围内”，后接大范围（如地点、组织、时间阶段等）。 表示 “在……中”，后接具体的人或事物（复数名词 / 集合名词），强调从同类中选出 “最……”的个体。 形容词和副词的最高级的范围 among + 同类群体 He is the richest man among the billionaires. Which is the smallest among these birds? out of + 明确范围 She scored the highest marks out of all candidates. This song is my favorite out of his new album. 强调 “在…… 群体中”，后接复数名词或代词，可与 of 互换，但 among 更侧重 “在多者之间” 的分布感。 表示 “从……中”，后接明确的复数名词或代词，常用于强调 “从某一特定范围中选出”。 The blue whale is the largest and heaviest animal in the world. The cheetah runs the fastest among all land animals. Bamboo is one of the most popular subjects in Chinese paintings. Read the sentences and pay attention to the underlined words. 最高级的常用句型： 主语+be动词+the+形容词最高级+in/of短语. 主语+实义动词（+the）+副词最高级+in/of短语. 主语+be动词+one of the+形容词最高级+可数名词复数+in/of短语. 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 16 The Yangtze River is_______________ river in the world. (第三长河） Jane always ______________________ in our class. (到校最早) Lin Sen is _______________________ in the class because he never gets to school on time. （最懒的学生之一） 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 arrives at school earliest 完成句子。 Presentation You play the Chinese flute better than anyone else in our music club. 你吹中国笛子比我们音乐俱乐部里的任何人都好。(你吹的最好) I love playing sports more than anything. 我最喜欢运动。 比较级表达最高级？ Let’s review! Do you remember these sentences? 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 18 当句子中出现 (more) than + 比较范围（如 anything, anyone, any other...） 时，常隐含最高级含义。 例如：He runs faster than anyone in his class. This movie is more moving than any other I’ve seen. 他比班上任何人都跑得快 → 他是班上跑得最快的。 这部电影比我看过的任何一部都感人 → 这是我看过的最感人的电影。 比较级表示最高级的用法 Among all animals, I love pandas the best. I think they are __________(cute) animals in the world. Which do you think is _________________ (beautiful), the rose, the peony, or the lotus flower? Look at that butterfly! It has __________________ (colourful) wings. Which animal jumps ___________ (high), the lion, the monkey, or the tree frog? 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. Practice Complete the sentences with the superlative forms of the words in brackets. 3b n. 玫瑰；蔷薇 n. 牡丹；芍药 n. 莲花 n. 蝴蝶 n. 翅膀；翼 n. 蛙；青蛙 接近；直到 v. 有……重；称重量 千克；公斤 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 20 Among all animals, I love pandas the best. I think they are _________(cute) animals in the world. Which do you think is ________________ (beautiful), the rose, the peony, or the lotus flower? Look at that butterfly! It has __________________ (colourful) wings. Which animal jumps ___________ (high), the lion, the monkey, or the tree frog? 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. Practice Check answers the cutest the most beautiful heaviest the most colourful (the) highest the largest 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 21 Some could stand up to three metres tall and weigh up to 860 kg. 有些象鸟站立起来可以接近3米高、重达860千克。 weigh v. 有……重；称重量 weight n. 重量；分量 常见搭配 weigh about+数词 重约…… weigh over+数词 超过……重 weigh up to+数词 重达…… 固定词组 put on weight 增加体重 lose weight 减重 — How much does the baby weigh? — It weighs 4 kg. Language point Complete the passage with the superlative forms of the words in the box. 3c 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 n. 银杏 v. 相信；认为有可能 n. 省份 散步 Let’s play a game! friendly sing well hard-working popular thin talented smart funny A:Who sings (the) best in your class? B: … A:Who is the thinnest in your class? B: I think … I want to know you! Lavf59.27.100 Packed by Bilibili XCoder v2.0.2 $$