Unit 4 Amazing Plants and Animals 知识点讲解 2026-2027学年人教版八年级英语上册

本初中英语讲义围绕“Amazing Plants and Animals”主题，系统梳理核心知识点，涵盖Section A的基础句型（the + 形容词最高级表“最……”、one of the + 最高级 + 名词复数表“最……之一”等），Grammar Focus的单/多音节形容词最高级、副词最高级及选择疑问句用法，Section B的功能句型（can't live without…等），并通过Vocabulary in Use的词汇转换与固定搭配练习，构建从基础到综合运用的学习支架。 该资料亮点突出，以语言能力培养为核心，通过拓展例句（如红杉树、猎豹等实例）和多样化练习（改错、翻译、填空）提升学生语言理解与表达能力。同时注重思维品质发展，如通过单/多音节最高级对比、句型转换（如改写最高级句型）引导学生分析与推断。课中辅助教师系统授课，课后帮助学生巩固知识，查漏补缺，有效提升学习效率。

Unit 4 Amazing Plants and Animals 知识点讲解 Section A 句子 1 What’s amazing about the blue whale? It’s the largest /biggest animal in the world. 核心语法：the + 形容词最高级，三者及以上范围内 “最……”；in the world 范围限定 拓展例句 What’s special about redwood trees? They’re the tallest trees on Earth. What’s amazing about cheetahs? They’re the fastest land animals. 练习 改错：It is largest animal in the sea. ________ 翻译：蓝鲸是世界上最重的动物。________________________________ 句子 2 Bamboo is one of the fastest-growing plants. 核心句型：one of the + 形容词最高级 + 可数名词复数 …… 中最…… 之一 拓展例句 Ginkgo is one of the oldest living trees. Pandas are one of the most popular animals in China. 练习 填空：This is one of ____ (interesting) plants I have seen. 句子 3 Some bamboo can grow almost one metre in one day. 句型：主语 + can + 动词原形 描述动植物具备的能力；数量表达 metre 可数 拓展例句 A cheetah can run over 100 kilometres an hour. A blue whale can eat four tons of food every day. 练习 翻译：有些竹子一天能长将近一米。____________ 句子 4 It’s a symbol of goodness in Chinese culture. 固定搭配：a symbol of …… 的象征 拓展例句 The ginkgo is a symbol of hope and long life. The dove is a symbol of peace. 练习 词性转换：The bamboo is a ____ (symbolize) of noble character. 句子 5 People can use it to build houses and make tools and instruments. 句型：use sth. to do sth. 用某物做某事 拓展例句 We use wood to make paper and desks. Bees use wax to make honeycombs. 练习 同义改写：People build houses with bamboo. People use bamboo ____ ____ houses. Grammar Focus 句子 1 The blue whale is the largest and heaviest animal in the world. 考点 1：单音节形容词最高级：large→largest, heavy→heaviest（变 y 为 i 加 est） 考点 2：并列两个最高级共用 the；in the world 限定比较范围 拓展例句 The elephant is the biggest land animal. The redwood is the tallest tree on earth. 练习 填空：This flower is the ____ (pretty) one in the garden. 句子 2 The cheetah runs the fastest among all land animals. 考点：副词最高级修饰实义动词；among + 三者及以上人 / 物 拓展例句 He sings the best in our class. This bird flies the highest among all small birds. 练习 改错：The rabbit runs fast than the turtle. ________ 句子 3 I think the most useful plant in the world is bamboo. 考点：多音节形容词最高级：the most + 形容词原形（useful, beautiful, colourful） 拓展例句 This is the most amazing animal I’ve ever known. The peony is the most beautiful flower here. 练习 变形：This is ____ (popular) tree in our city. 句子 4 It is one of the most interesting plants in the world. 考点固定结构：one of the + most + 多音节形容词 + 名词复数 拓展例句 This is one of the most important animals on the planet. They are one of the most common trees in parks. 练习 句型转换：Ginkgo trees are very ancient.（改成最高级句型） Ginkgo trees are one of ____ ____ ____ trees on earth. 句子 5 Which do you think is the most beautiful, the rose, the peony, or the lotus flower? 考点：三者选择疑问句，用最高级；范围用 or 连接并列对象 拓展例句 Which animal jumps the highest, the monkey, the frog or the kangaroo? Which fruit is the sweetest, apple, grape or watermelon? 练习 翻译：你认为哪种动物最勤劳，蜜蜂、蚂蚁还是蝴蝶？____________ Section B 句子 1 We can’t live without bees. 句型：can’t live without… 没有…… 就无法生存 拓展例句 We can’t live without clean water and plants. Plants can’t grow without sunlight. 练习 翻译：人类没有动植物无法生存。____________ 句子 2 As they fly from one flower to another, they take pollen with them. 语法：as 引导时间状语从句，意为 “当…… 的时候”；from one…to another 从一个到另一个 拓展例句 As the bees work, they make sweet honey. As seasons change, different flowers come out. 练习 翻译：当蜜蜂从一朵花飞到另一朵花时，它们携带花粉。____________ 句子 3 Bees play an important part in the ecosystem of our planet. 固定短语：play an important part in… 在…… 中起重要作用 拓展例句 Trees play an important part in cleaning air. All animals play an important part in nature. 练习 同义句：Trees are very important to our environment. Trees ____ ____ important part in our environment. 句子 4 When a bee finds new food, it uses a dance to tell the others where and how far away the food is. 复合句：when 引导时间状语从句；宾语从句陈述语序 拓展例句 When the panda finds bamboo, it stops to eat. When birds find safe places, they build nests there. 练习 改错：He tells me where is the bamboo sea. ________ 句子 5 Blue whales play an important role in our world, so we must protect them. 短语：play an important role = play an important part；must + 动词原形 表必须 拓展例句 All living things play an important role in nature, so we should protect them. 练习 翻译：蓝鲸在自然界十分重要，我们必须保护它们。____________ Vocabulary in Use 句子 1 I felt disappointed when my favourite flowers died. 单词：disappointed adj. 感到失望的；disappoint v. 使失望；disappointing adj. 令人失望的 拓展例句 I feel disappointed to see fewer bees around. 练习 词性转换：The news is ____ (disappoint), so I feel sad. 句子 2 In my hometown, people often use bamboo baskets to store food. 单词：store v. 储存；n. 商店 拓展例句 Bees store honey in honeycombs. We store fruit in cool places. 练习 翻译：蜜蜂在蜂巢里储存蜂蜜。____________ 句子 3 Frogs help to protect farms by eating insects. 短语：help to do sth. 帮助做某事；by doing sth. 通过做某事 拓展例句 Trees protect us by cleaning the air. Birds protect crops by eating pests. 练习 填空：Trees help ____ (cool) the air by absorbing heat. 句子 4 They are popular subjects in studies on climate change and the ecosystem. 核心搭配：studies on… 关于…… 的研究；climate change 气候变化；ecosystem 生态系统 拓展例句 Many scientists do studies on animal protection. 练习 翻译：科学家开展关于动植物的生态研究。____________ 句子 5 I can’t imagine my life without my pets. 单词：imagine v. 想象；imagination n. 想象力；imagine doing sth. 想象做某事 拓展例句 I can’t imagine a world without trees. 练习 改错：I can’t imagine live without green plants. ________ 句子 6 However, not everyone understands their importance in nature. 考点：however 然而（逗号隔开）；importance n. 重要性；important adj. 重要的 拓展例句 Plants are everywhere. However, few people know their importance. 练习 词性转换：We all know the ____ (important) of protecting wildlife. 学科网（北京）股份有限公司 $