Unit 4 Section B（3a-3c）（同步教学课件）-2025-2026学年八年级英语上册同步教学精品课件（人教版2024）

该初中英语课件围绕“蓝鲸”核心知识点，通过视频导入（如观看蓝鲸是地球最大哺乳动物视频），引导学生预测文本内容、快速阅读找主旨、完成信息表格，搭建从阅读输入（3a提取体重、栖息地等信息）到写作输出（3b第一人称改写、3c创作自述短文）的学习支架，层层递进。 其亮点在于融合思维品质（分析文本结构、逻辑推理动物行为）与语言能力（习得“live up to”“except”等词汇句式），通过任务链（阅读填表-人称转换-写作创作）提升学习能力。例如3a训练信息提取，3b转换人称练表达，3c结合体裁指导写作，助力学生综合运用语言，教师可高效开展教学。

Section B 3a-3c Unit Amazing Animals and Plants Learning Aims 语言能力 文化意识 思维品质 学习能力 Acquire vocabulary about 动植物 (e.g., amazing, survive, environment) and complex sentences (e.g., attributive clauses). Describe features of plants/animals accurately. Summarize reading passages (3c); conduct group discussions on ecological roles of species. Analyze text structure (problem-solution in 3a); infer animal adaptations through logical reasoning. Explore global biodiversity; appreciate how different cultures view unique species (e.g., cacti in desert regions). Watch the video What’s the text mainly talk about? It talks about the blue whale. We can predict the main content of the article through the title and pictures. 3a Look at the title and the picture below. Guess what the text is about. 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 4 Read fast and answer. What’s the main idea of the text? The text mainly introduces some facts about blue whales, including their weight, food, lifespan, and their role in the ecosystem. What do you know about the blue whale? marine mammal biggest animal endangered species Place: deep ocean Food: krill（磷虾） ... 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 6 3a Blue whale facts Weight Where they live Food How long they live Role in ecosystem Read the text and complete the table. 根据关键词在文中锁定信息。 Blue whale facts Weight Where they live Food How long they live Role in ecosystem As much as 200 tons All oceans except the Arctic Ocean Some of the tiniest animals in the ocean Up to 90 years Become food for many sea animals when dying and help create a lively and healthy ecosystem 北冰洋 tiny 微小的 lively 生机勃勃的 Read the text and complete the table. The Blue Whale 3a The blue whale is the largest and heaviest animal on earth. It can weigh as much as 200 tons. Many people like watching blue whales swim, and they think it is one of the most beautiful things to see. Blue whales live in all oceans except the Arctic Ocean. They eat a lot, but they eat some of the tiniest animals in the ocean. A blue whale can eat around four tons of these a day. as much as多达…… Read the text and complete the table. 3a Blue whales can live up to 90 years. When a blue whale dies at sea, it becomes food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a lively and healthy ecosystem. Blue whales play an important role in our world, so we must protect them. live up to长达，多达…… last for持续 Blue whale facts Weigh Where they live Food How long they live Importance in nature as much as 200 tons all oceans except the Arctic Ocean. tiny ocean animals up to 90 years after death, their bodies provide food for other animals, creating a healthy ecosystem for over a year 3a Read the text and complete the table. Imagine you are a blue whale. Use the first person to rewrite the first paragraph. 3b Hello everyone! My name is Billy the Blue Whale. I am __________________________________________ I'm heavy, but I __________________________________________ I livein__________________________________________ My favourite food is __________________________________ _ I can eat ________________________________________ the largest and heaviest animal on Earth. love swimming gracefully in the ocean. all oceans except the Arctic Ocean. tiny ocean animals like krill（磷虾）. around four tons of krills every day! Complete your passage about the blue whale based on the text in 3a. 3c __________________________________________ __________________________________________ _______________________________________________ ________________________________________________ ____________________________________________ Complete your passage about the blue whale based on the text in 3a. 文本体裁 话题分析 围绕 “蓝鲸（Blue Whale）”就其体重、生存区域、食物、寿命以及在生态系统里的作用等内容来写，让读者获取关于蓝鲸的知识。 记叙文+说明文：客观介绍蓝鲸的各类事实信息，清晰、有条理地阐述蓝鲸。 人称时态 用 “I（我）” 的视角和一般现在时，要写出亲切、有代入感的内容，让读者感觉是蓝鲸在 “自述”。 3c 写 作 指 导 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 14 Observe and think What should we mainly pay attention to when rewriting an article? 人称: 由第三人称变成第一人称 内容要点: 要点不能省略或者遗漏。 语言: 个别句子需要变化结构 weight living area food amount of food eaten preference 按照以下维度，完成改写后先自查。再和同伴交流，互相评价、提建议。 评价指标 建议 人称转换准确性:原文中第三人称（blue whales/a blue whale）均换成第一人称,无转换错误。 内容完整性：涵盖原文关键信息，无信息遗漏。信息顺序可适当调整，但逻辑要通顺，符合第一人称叙述的自然感。 语言流畅性：改写后的句子读起来顺畅，符合英语表达习惯，没有生硬、断裂的感觉。避免因人称转换出现语法错误，影响表意。 情感与角色契合度：语言要符合蓝鲸自述的特点，增强第一人称的代入感。体现出蓝鲸的“诉求”，让读者能体会到蓝鲸的价值和保护的必要性。 Hello everyone! My name is Billy the Blue Whale. I am the largest and heaviest animal on earth. I can weigh as much as 200 tons. I’m heavy, but I love swimming. I live in all oceans except the Arctic Ocean. My favourite food is some of the tiniest animals in the ocean. I can eat around four tons of these tiny animals a day. I can live up to 90 years. When I die at sea, I become food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a lively and healthy ecosystem. I play an important role in the world, so please protect me! Sample 1 Sample 2 Hello everyone! My name is Billy the Blue Whale. I am the largest and heaviest animal on earth. I can weigh as much as 200 tons. I’m heavy, but I love swimming freely in the vast oceans. The cool, salty water feels like a big home to me. I live in all oceans except the Arctic Ocean. The warm and cold currents in these oceans bring me plenty of food. My favourite food is some of the tiniest animals in the ocean——krills. Don't be surprised! Even though I'm huge, I have a taste for these little guys. I can eat around four tons of them each day. It's like having a never-ending buffet! Language points Point 1 Blue whales can live up to 90 years. 蓝鲸的寿命可达 90 年 。 达到；符合（期望等） live up to 活到（某一年龄、岁数等） He always lives up to his parents’ expectations. 他总是不辜负父母的期望。 An elephant can live up to sixty years. 一头象能活到60岁。 拓展 同义词 reach reach 达到（某一数量、程度、年龄等 ）；在表示活到某一年龄时，可与 “live up to” 替换。 Some trees can reach a height of 30 meters. 有些树能长到 30 米高 。 Some people can reach 90 years old. 有些人能活到 90 岁 。 Point 2 Blue whales live in all oceans except the Arctic Ocean. 蓝鲸生活在除北冰洋以外的所有海洋中。 （连词）除了,只是；除非 （介词）除……之外；除了 The restaurant is open every day except Monday.这个饭店除了星期一每天都营业。 其后接名词、代词等作宾语，表示某人或某物不包含在某一范围内。 except I won’t go except you come with me. 除非你跟我一起去，否则我不会去。 My dress is similar to yours, except mine is blue.我的连衣裙和你的相似，只是我的是蓝色的。 辨析 except, besides与but except 除……之外；除了 强调所排除的内容不包含在内，含有“减去”的意思 besides 除……之外（还有） 包括 besides 后面的内容，含有“加上”的意思 but 除……之外 与 except 用法基本相同。常用于no, nothing, anything 之后 They all went to the party except Ann.除了安，他们都去了聚会。 We have a lot in common besides music.除了音乐，我们还有很多共同点。 There is no one but me.这里除了我没有别人。 except We are all here except/but Tom.除汤姆之外,我们都在这里了。(不包括 Tom) except for He is a good man except for his bad temper. 除了脾气有点儿差之外,他是一个好人。 but She could do nothing but cry.她除了哭什么都做不了。 besides Besides milk, we need vegetables.除了牛奶,我们还需要蔬菜。(也需要牛奶) eg：They were all there except me.我以外他们都在那里。 eg：Besides, I have something important to tell you. 此外，我有重要的事情要告诉你。 eg：No one but me passed the exam yesterday. 昨天除了我以外没别人考及格。 1.My father goes back to Nanjing for the Spring Festival every year _____ last year because he was busy with his work in Changzhou. A．including B．since C．except D．till 2．Everyone except Mike _____(be) going to play basketball because he doesn't like it. 3.Everyone is here ____ Alan, because he is still ill in hospital. C is except Point 3 Blue whales play an important role in our world, so we must protect them.蓝鲸在我们的世界中发挥着重要作用，所以我们必须保护它们。 role n.角色；作用；职责；任务 【常用短语】 play a role (in) 在...中发挥作用；扮演角色，相当于____________ eg：Trees play an important role in maintaining ecological balance. 树木在维护生态平衡方面起着重要的作用。 play a part (in) Point 4 2.This food lasts for over a year and it helps to create a lively and healthy ecosystem.这些食物能维持一年多，有助于创造一个生机勃勃、健康的生态系统。 last ①【不及物动词】持续,延续，常与时间段连用。 How long will the bad weather last? 这种坏天气会持续多久? Our summer vacation lasts long , for nearly two months. 我们的暑假持续时间很长将近两个月。 ②【形容词】上一个的;刚过去的;最后的 last week上周 the last bus 末班公共汽车 ③【副词】最后;上一次;最后一次 e.g. When did you last see him?你上一次见到他是什么时候? ④【名词 &代词】最后的人或事物 e.g. He was the first to arrive and the last to leave. 他到得最早，离开得最晚。 一、 单项选择。 （　A　）1. I like all fruits  　　　　apples. Apples make me feel sick. A. except B. besides C. beside D. except for （　A　）2. The restaurant is not very famous.  　　　　， it serves the best pizza in town. A. In fact B. In need C. In danger D. In common A A Exercises （　B　）3. — Do you know  　　　　the super-market is from here？ — Sorry， I’m new here. A. how long B. how far C. how many D. how old （　D　）4. This kind of food is  　　　　in this area， but I don’t think it tastes good. A. important B. different C. fresh D. popular B D 一 二 三 四 五 （　A　）5. — Can I ask you some questions about the project？ — Sure.  　　　　to ask me anything. A. Feel free B. Make sure C. Pay attention D. Look forward A （ ）6. Cheating in exams ______ losing the trust of teachers and classmates. A. mean B. means C. to mean B 单项选择 7.The ______ child is always full of energy and keeps laughing. A. lively B. live C. lived 8.We took a walk ______ the lake and enjoyed the beautiful scenery. A. around B. with C. from 9. We should protect blue whales because they play a very ______ role in our world. A. small B. common C. important A C A 二、 用方框中所给单词的适当形式填空。 role　climate　communicate　wing　tiny 1. Look！ The baby’s hands are so  　tiny　. 2. The  　climate　 here is warm and humid（湿热的） all year round. 3. My dad plays different  　roles　 at work and at home. 4. I  　communicated　with my neighbor about the noise problem just now. 5. Butterflies have colorful  　wings　. How beautiful！ tiny　 climate　 roles　 communicated　 wings　 三、用所给词的适当形式填空。 1. She wants to do some _________ (study) on how to protect the ocean ecosystem. 2. I saw a girl _________ (dance) in the classroom just now. 3.What does this word ________? I can't understand its __________.（mean） 4. This is the ________________ (delicious) cake I've ever eaten. I really love it! dancing meaning studies mean most delicious 5. The squirrel always  　stores　（store） a lot of food for the winter. 6. The rainy weather  　disappointed　（disappoint） the children because they wanted to play outside. 7. The elephant weighs about three  　tons　（ton）. 8. Parents often teach children the  　importance　（important） of being honest. 9. They save money every month in order  　to buy　（buy） a new house. stores　 disappointed　 tons　 importance　 to buy　 1. 猎豹在所有陆地动物中跑得最快。 The cheetah runs  　the　  　fastest　 among all land animals. 2. 我认为世界上最有用的植物是竹子。 I think  　the　  　most　  　useful　 plant in the world is bamboo. 3. 你认为哪个是最漂亮的，玫瑰、牡丹还是莲花？  　Which　 do you think is  　the　  　most　  　beautiful　， the rose， the peony， or the lotus flower？ the　 fastest　 the　 most　 useful　 Which　 the　 most　 beautiful　 4. 哪个动物跳得最高，狮子、猴子还是树蛙？ Which animal jumps  　highest　， the lion， the monkey  　or　 the tree frog？ highest　 or　 四. 完成译句 (每空一词)。 本课句型 Summary 我都 学会了! Basic (必做) Read and remember the new words and sentences in this part. Improving(选做) 2. Make an English handwritten newspaper with the theme of "Animals and Our Ecosystem". Extend (选做) 3.Record an English to introduce an animal you like. Homework Thank you ! $