Unit 5 Power of Ideas 作文讲义2025-2026学年人教版英语九年级上册

Unit 5 Power of Ideas 作文讲义 单元核心概况 核心话题：各类发明、发明诞生过程、发明对生活 / 世界的影响、从想法到实物； 核心语法：被动语态 am/is/are done；was/were done； 题型一：说明文 My Favourite Invention 作文题目 英语专栏征稿 My Favourite Invention，请选取一项你最喜欢的发明（手机、高铁、飞机、3D 打印机、收音机、造纸术等）写作，内容包含： 发明者与发明时间； 发明诞生的初衷、研发遇到的困难； 这项发明对人们生活、世界带来的改变。 教师思路精讲 第一段：开门见山，点明最喜欢的发明，简单总述它的巨大作用； 第二段：介绍发明背景、发明者、研发难题、制造 / 工作原理； 第三段：阐述发明带来的改变，抒发个人感悟与评价。 写作要点拆解 首段：直接点题，用简单被动句引出发明； 主体段：结合课文素材，写发明诞生过程，使用被动语态描述制作、生产、传播流程； 尾段：分析发明的价值，说明它如何便利生活、缩小世界。 核心句型 & 单元词组 开篇介绍发明 My favourite invention is …, which greatly changes people’s daily life. It is one of the most important inventions that were created in history. There is no doubt that … is the greatest invention of all time. 描述发明背景、过程（被动语态核心） It was invented by … in … Many difficult problems were met during its development. Materials like … were mixed and boiled to make it. Messages can be sent across the world by this machine. 描述发明带来的影响 This invention made the world much smaller. It results in faster communication and easier travel. The technique was spread to other countries and improved their culture. 单元核心短语 turn ideas into reality 将想法变为现实；result in 导致；to one’s surprise 令某人惊讶的是；spread information 传播信息；solve problems 解决难题；carry out tests 开展测试；be made of/from 由…… 制成 高分范文 My Favourite Invention My favourite invention is the plane. It is such a great creation that the whole world has been changed by it. It was invented by the Wright brothers in December 1903. At first, they only dreamed of flying like birds. Two big challenges were faced by them: how to lift the glider into air and how to control it. They studied birds’ flight and solved these problems. Later, an engine was added to the glider, and the first successful flight was finished. Planes make long-distance trips much faster. Journeys that took months before can be completed in hours. Better communication between different countries is brought by planes. Thanks to this invention, the world becomes a small global village. I believe more new flight inventions will be created in the future. 题型二：议论文 The Most Useful Invention of All Time 作文题目 班级英语辩论赛征文：The Most Useful Invention of All Time，请你写短文表达观点，要点： 点明你认为最有用的发明； 对比没有这项发明的生活，说明它的价值； 分析它带动了哪些其他发明、带来哪些社会进步。 教师思路精讲 第一段：亮出观点，提出自己心中最伟大的发明； 第二段：分两点论证，从前信息传递缓慢，发明出现后信息快速传播，衍生其他发明； 第三段：总结升华，强调发明推动人类文明进步。 高分范文 The Most Useful Invention of All Time In my opinion, the radio is the most useful invention of all time. It was invented by Guglielmo Marconi in the 1890s. Before the radio was invented, news travelled very slowly. Long-distance messages could not be sent quickly. In 1901, a radio message was sent across the Atlantic Ocean for the first time. After that, news can be spread all over the world in seconds. Besides, many other inventions were developed because of the radio, such as televisions. It also changed music: works of artists from different countries can be enjoyed by everyone easily. The radio breaks the limit of distance and connects people closely. It shows how powerful creative ideas are. Without it, we would never get information so quickly. It is truly a life-changing invention for human beings. 题型三：说明文介绍中国古代发明 Cai Lun’s Papermaking 作文题目 校英文报开设 “中国古代发明” 板块，请介绍造纸术，内容包含： 蔡伦之前古人的书写材料及其缺点； 蔡伦造纸的原料、制作流程； 造纸术传播对世界文明的巨大影响。 教师思路精讲 第一段：引出造纸术是改变世界的伟大中国发明； 第二段：对比早期书写材料，介绍蔡伦的创新与完整造纸工序； 第三段：写造纸术向外传播，推动全球知识与文化发展。 高分范文 The Great Invention of Papermaking Papermaking is one of the greatest inventions created in ancient China, and it speeds up the spread of information all over the world. Before Cai Lun’s paper, people wrote on bones, bamboo slips and silk. Those materials were either heavy or expensive. As an official, Cai Lun found a new way. Bark, old clothes and plant fibres were used as materials. All ingredients were mixed and boiled, then beaten and cut. The liquid was poured on bamboo screens, and the dry fibres were pressed into paper. It was cheap, light and easy to use. In 105 CE, Cai Lun showed his paper to the emperor. Later, the papermaking skill was spread to Asia, Arabic countries and Europe. More books were produced, and knowledge was shared widely. This amazing invention shaped the whole modern world. 题型四：建议信 作文题目 你的外国朋友 Jack 对新科技发明感兴趣，请写一封信向他介绍 3D 打印机，要点： 3D 打印的工作流程； 它可以制作的物品； 这项发明给生活、医疗、工业带来的便利。 教师思路精讲 第一段：问候，告知自己发现一款神奇发明 ——3D 打印机； 第二段：分步介绍打印流程、可制作物品； 第三段：讲它的实用价值，推荐他了解这项技术。 高分范文 Dear Jack, I’m writing to introduce a fantastic modern invention—the 3D printer to you. It is widely used in many fields now. First, an object is designed on the computer, and its file is sent to the printer. The file is read, and the object is created by plastic layer by layer. Many things can be made by it, such as toys, shoes, chairs, man-made arms and legs, even houses and medicine. 3D printing brings great convenience to our life. Broken parts can be produced quickly, and special medical tools are made for patients. It turns our creative ideas into real things easily. I hope you can learn more about this amazing invention. I’m looking forward to your reply. Yours, Li Hua 题型五：倡议书 Create More Great Inventions 作文题目 学生会发起 “激发创新，创造发明” 主题倡议，以学生会名义写倡议书： 发明改变生活，古今伟大发明都源于创新想法； 拥有创新精神的重要性； 呼吁同学们善于观察、大胆思考、勇于尝试，创造新想法。 高分范文 Create More Great Inventions Dear fellow students, All convenient things we use today are great inventions. From ancient papermaking to modern 3D printers, the world is changed by creative ideas. Every valuable invention is turned from simple thoughts into reality. Being creative helps us solve daily problems. Inventors never give up when difficulties are met. They observe life carefully and carry out many tests to improve their works. Without imagination and courage, no new inventions will be produced. Let’s learn from great inventors. Watch our life carefully, dare to think new ideas and be brave to try. Use our wisdom to create small inventions and make our life better. Let’s make more creative ideas come true together! The Student Union 单元万能写作素材 一、单元核心语法：被动语态 一般现在时被动：am/is/are + 过去分词 Many kinds of dishes can be made by Smart Cook. 一般过去时被动：was/were + 过去分词 The plane was invented by the Wright brothers in 1903. 情态动词被动：can/may be done All small objects can be produced by 3D printers. 二、各类发明通用万能句 It was invented by … in … Lots of difficulties were met during its creation. This invention results in great changes of people’s life. The technology was spread to other countries centuries later. Without this invention, the world would develop much more slowly. 三、单元高频词汇 核心动词 / 变形（名词 - 动词 - 形容词） invent v. 发明 —invention n. 发明 —inventive adj. 有创造力的 create v. 创造 —creation n. 作品 —creative adj. 有创意的 produce v. 生产 —product n. 产品 —production n. 生产 collect v. 收集 —collection n. 收藏 发明相关名词 inventor 发明者；technique 工艺；fibre 纤维；glider 滑翔机；test 测试；communication 交流 核心短语 to one’s surprise 令某人惊讶；result in 造成、带来；stand up 站起来；turn ideas into reality 将想法变为现实；spread information 传播信息；carry out tests 开展测试 四、三段式通用写作模板 模板 1：My Favourite Invention 发明说明文 My favourite invention is ____________. It is one of the most important creations in human history. It was invented by ____________ in ____________. Many problems ____________ (meet) when people developed it. Materials like ____________ were used to make it. After lots of tests, it was finally finished. This invention changes our life a lot. It helps people ____________ and makes the world smaller. I think more useful inventions will be created in the future. 模板 2：议论文《The Most Useful Invention》 I think ____________ is the most useful invention of all time. It was invented by ____________. Before it appeared, people ____________. After it was created, information / travel ____________. Many other inventions were also developed because of it. This invention connects people closely and pushes the world forward. It teaches us that creative ideas can change everything around us. 模板 3：介绍古代发明通用框架 ____________ is a famous ancient Chinese invention. It was invented by ____________. In early times, people used ____________ to write or travel, but they had many weaknesses. The inventor tried many ways and used new materials to make it. Clear steps were followed to finish the product. Later, the skill was spread to the whole world. It results in fast development of culture and brings great progress to human society. 学科网（北京）股份有限公司 $