Unit 4 Section B（3a-3c Writing）（同步实用课件）-2025-2026学年八年级英语上册同步精美课件（人教版2024）

该初中英语课件聚焦蓝鲸科普知识，通过问题引导课堂导入，构建“阅读提取信息（体形、栖息地等）—写作改写自述”的任务链，提供填空模板、改写步骤等学习支架，帮助学生系统梳理知识点。 其亮点在于读写结合，3a训练信息提取能力（语言能力），3b-3c第一人称改写培养句式转化与创造力（思维品质），渗透生态保护意识（文化意识）。采用支架式教学，学生提升语言表达与写作技巧，教师可借助清晰步骤和示例提高教学效率。

Unit4 Amazing Plants and Animals? Section B 3a-3c 内容分析 文本分析：本单元读写板块的阅读文本是一篇关于蓝鲸的科普说明文。文章从蓝鲸是地球上最大、最重的动物谈起，简要提及蓝鲸的体重和人们对蓝鲸的喜爱，随后介绍了蓝鲸的分布范围、食物来源、寿命以及蓝鲸死亡后对生态系统的贡献。最后，文章以呼吁保护蓝鲸作为结尾。与前面阅读板块的文本不同的是，该科普说明文的内容以客观事实为主，没有过多的感情渲染，也缺少与读者互动的语句，但文章通过具体的数据增强了信息的可信度和说服力。另外，文章语言简洁，结构清晰，具有科普文的典型特征。 文本中不仅多处呈现了本单元的目标结构（如the largest and heaviest animal on earth、one of themost beautiful things to see、some of the tiniest animals in the ocean），还提供了许多有用的短语、句式结构及表达，如weigh as much as...、in all oceans except...、 at sea、animals living in and around the sea、help to create a lively and healthy ecosystem、play an important role等。教师可有意识地鼓励学生记忆和运用这些表达，以提高他们的综合语言运用能力。 活动设计：活动3 a - 3 c是本单元Section B的读写任务链，其中3a是阅读理解活动，3b-3c则是基于3a阅读文本的写作活动。活动3a提供了一篇科普说明文，要求学生通过阅读找出与蓝鲸相关的细节并填写信息表格。这一活动主要训练学生从文本中获取细节信息的能力。活动3b设置了情境，让学生想象自己是一头蓝鲸，尝试运用第一人称改写3a的阅读文本的第一段。该活动还为学生搭建了语言支架，以便学生顺利完成改写。活动3c是活动3b的延续，要求学生继续改写活动3a的阅读文本的第二段，最终形成完整的自述。将第三人称叙述的文本转化为第一人称，这一任务不仅要求学生根据代人角色及时调整句子结构、时态和语气，还需要他们充分发挥创造力和想象力，因此有助于提升学生的语言表达、理解转化与写作技巧，同时培养他们的创造力、批判性思维和同理心。 1. 能够通过阅读提取与蓝鲸相关的关键科学信息（包括体形特征、栖息地、食性、寿命及生态作用），并用表格进行系统整理。 2. 能够以第一人称视角将科普说明文改写成拟人化的蓝鲸自述，准确转化原文中的科学事实。 3.能够主动学习和了解有关蓝鲸以及海洋生态系统的相关科学知识，理解蓝鲸在海洋生态系统中的重要作用，提高自身的海洋生态保护意识。 教参学习目标 Questions: 1. How large can a blue whale be? 2. How much can it weigh? 3. What kind of food does it eat/live on/ feed on? It can be 30 meters long. / It can reach up to 30 meters. It can weigh over 200 tons/ as much a 200 tons. It eats/lives on/feeds on krill(单复数同形). 4. Do you want to watch the blue whale swim? Why? Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother What’s the text type of this article? A. A narrative essay (记叙文) B. An expository essay(说明文) C. An argumentative essay(议论文) This article tells________about the blue whale ! facts information 1. What's amazing about the blue whale? 2. How much does it weigh? /How heavy is it? It's the largest and heaviest animal on earth. It weighs as much as 200 tons. They like watching blue whales swim. Because they think it is one of the most beautiful things to see. 3. What do many people like doing? Why? 4. Can you ask more questions about the blue whale? Let's have a try! Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother Blue whale facts Weight Where they live Food How long they live Importance in nature 3a Read the text and complete the table. as much as 200 tons in all oceans except the Arctic Ocean some of the tiniest animals in the ocean up to 90 years becomes food for many kinds of animals create a lively and healthy ecosystem Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother Blue whale facts Weight Where they live Food How long they live Importance in nature 3a Read the text and complete the table. as much as 200 tons in all oceans except the Arctic Ocean some of the tiniest animals in the ocean up to 90 years becomes food for many kinds of animals create a lively and healthy ecosystem Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother 3b Imagine you are a blue whale. Use the first person to rewrite the first paragraph. Hello everyone! My name is Billy the Blue Whale. I am _________ ___________________________I’m heavy, but I ______________ ___________________________ I live in ____________________ I can eat ___________________ ___________________________ Step 1: 人称变化 由第三人称变成第一人称 Step 2: 句子变式 个别句子需要变化结构 Step 3: 内容完成 保证内容没有遗漏 What should you pay attention to? 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. Step 1: Change the person Find third person! Find the verbs 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. Step 1: Change the person Change 3rd into 1st person I I me I We/I We/I We/I I Change verbs into correct forms am can weigh swim am live eat eat can eat Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother They think one of the most beautiful things to see. I I me We/I We/I We/I I am can weigh swim. I am live eat eat can eat the largest and heaviest animal on earth. as much as 200 tons. Many people like watching in all oceans except the Arctic Ocean. a lot. some of the tiniest animals in the ocean. around four tons of these a day. I am the largest and heaviest animal on earth. I can weigh as much as 200 tons. Many people like watching me swim. I live in all oceans except the Arctic Ocean. I eat a lot. I can eat around four tons of these a day. They think I am one of the most beautiful things to see. I eat some of the tiniest animals in the ocean. Hello everyone! My name is Billy the Blue Whale. I am ________ ______________________________________________________ ______________________________________________________ I’m heavy, but I _________________________________________ I live in ________________________________________________ I can eat _______________________________________________ Compare the sentences above and below! Step 2: Change sentence patterns Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother Hello everyone! My name is Billy the Blue Whale. I am ________ ______________________________________________________ ______________________________________________________ I’m heavy, but I _________________________________________ I live in ________________________________________________ I can eat _______________________________________________ I am the largest and heaviest animal on earth. Many people like watching me swim. I eat a lot. I can eat around four tons of these a day. They think I am one of the most beautiful things to see. I eat some of the tiniest animals in the ocean. Step 2: Change sentence patterns I can weigh as much as 200 tons. I live in all oceans except the Arctic Ocean. Many people like watching me swim. They think I am one of the most beautiful things to see. I eat a lot. I can eat around four tons of these a day. I eat some of the tiniest animals in the ocean. I’m heavy, but I _________________________________ ______________________________________________________________________________________________ I can eat _______________________________________ __________________________ like/love swimming in the oceans. around four tons of the tiniest animals in the ocean a day. Similar meaning! What does “these” refer to? Step 2: Change sentence patterns How do you connect the sentences? Add a sentence like/love swimming 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 in the oceans. Many people like watching me swimming. They think it is one of the most beautiful things to see. I live in all oceans except the Arctic Ocean. I can eat around four tons of the tiniest animals in the ocean a day. The whole paragraph will be ... Step 3: Complete the content Make sure no information is missing! 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. Can you rewrite the second paragraph into first person, too? Step 1: Change the person from 3rd to 1st Step 2: Change sentence patterns Step 3: Complete the content (no information is missing) 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. One possible answer... Step 1: Change the person from 3rd to 1st Step 2: Change sentence patterns Step 3: Complete the content (no information is missing) I I I I I us your you die become help 第一人称转第二人称 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 I help to create a lively and healthy ecosystem. We/I play an important role in your world, so you must protect us. However, the blue whales are facing some problems! Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother What problems are they facing? Noise prevents them from communicating The ship might hit them! Climate changes cause less food! Plastic pieces cause their sickness! Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother Writing Extension: Step 1: Change the person from 3rd to 1st Step 2: Change sentence patterns Step 3: Complete the content (no information is missing) The blue whale is an amazing animal, but it is facing serious problems. It is hard for it to communicate and find food because the ocean is becoming noisier and there are too many ships. Also, many whales get hit by large ships when they swim near the surface(n.水面). Besides, it sometimes eats plastic(n.塑料) pieces and gets sick because humans always throw plastic away into the ocean. Lastly, it has less and less food because of climate change. So, we should do something to help them! Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother The blue whale is amazing animals, but it is facing serious problems. It is hard for it to communicate and find food because the ocean is becoming noisier and there are too many ships. Also, many whales get hit by large ships when they swim near the surface(n.水面). Besides, it sometimes eats plastic(n.塑料) pieces and gets sick because human always throw plastic away to the ocean. Lastly, it has less and less food because of the climate change. So, we should do something to help them! Hello! I'm Billy the Blue Whale. I need to tell you about my troubles. It's hard ____________________________________ I am hurt because ____________________________________ Sometimes I eat _____________________________________ I have _______________________________________________ So, could you please do somthing to help us? Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother Extension Writing: The blue whale is an amazing animal, but it is facing serious problems. It is hard for it to communicate and find food because the ocean is becoming noisier and there are too many ships. Also, many whales get hit by large ships when they swim near the surface. Besides, it sometimes eats plastic pieces and gets sick because humans always throw plastic away into the ocean. Lastly, it has less and less food because of climate change. So, we should do something to help them! Step 1: Change the person from 3rd to 1st Step 2: Change sentence patterns Step 3: Complete the content (no information is missing) Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother A Possible Answer Step 1: Change the person from 3rd to 1st Step 2: Change sentence patterns Step 3: Complete the content (no information is missing) Hello! I'm Billy the Blue Whale. I need to tell you about my troubles. It's hard _____________________________________ ____________________________________________________ I am hurt because _____________________________________ ________. Sometimes I eat _____________________________ __________________________________________I have _______ __________________________________ So, could you please do somthing to help us? the ocean is becoming noisier and there are too many ships. I get hit by large ships when I swim near the humans always throw plastic away into the ocean. less food because of climate change. for me to communicate and find food because surface plastic pieces and get sick because less and Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother What can we do to proect whales? Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother We can protect whales by using less plastic. We are parts of the world and so are they! Protect life on earth, big or small! by keeping the oceans clean. by making less noise in the ocean. by learning and sharing. Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother Make notes! 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. 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. 在地球上 多达，达到…… 之多 /ˈəʊʃn/ n. 大海；海洋 /ɪkˈsept/ prep. 除……之外；除了 tiny /ˈtaɪni/ adj. 极小的；微小的 live up to 达到；符合 /ˈlaɪvli/adj. 精力充沛的；生机勃勃的 扮演一个重要的角色 die vi.死亡 death n.死亡 dead adj.死的；去世的 deadly adj. 致命的 一个生机勃勃且健康的生态系统 Wondermother Wonder mother Wonder mother Wonder mother Wonder mother Wonder mother Wondermother Wondermother Wondermother Homework: Must do: Revise and improve your writing for task 3c. Please submit your final version in our next class. Choose to do: Find more information online about blue whales and come up with some practical suggestions on how we can help protect them. Thanks! $