Unit5 Power of Ideas暑期预习-重点知识课件 2026-2027学年人教版英语九年级上册

该初中英语课件围绕“发明与创意”主题，聚焦被动语态（一般现在时、过去时及含情态动词），通过“创意能带来什么”的Big Question导入，结合3D打印机、收音机、造纸术等实例，搭建词汇分类（发明名称、动词）、语境对话、语法结构解析及写作框架等学习支架，帮助学生衔接前后知识。 其亮点在于融合文化意识与思维品质，通过阅读《An Invention That Changed the World》解析蔡伦造纸术及传播，渗透家国情怀；借助指代词阅读策略培养分析推断能力。项目活动“设计发明海报”整合语言能力，学生需用被动语态描述发明材料、用途及影响，既提升语言运用能力，又激发创新思维，教师可依托系统资源高效开展教学。

UNIT 5 Power of Ideas Power of Ideas — 创意改变生活 2026秋人教版九年级上册英语 · 重点知识学案 单元概览与学习目标 【主题】Inventions & Creative Ideas（发明与创意） 【Big Question】What do creative ideas bring about? 创意能带来什么？ 【In this unit, you will】 ▸ talk about inventions — 谈论各类发明 ▸ discuss how inventions change our lives — 讨论发明如何改变生活 ▸ describe inventions using the passive voice — 用被动语态描述发明 ▸ explore the stories of inventors and inventions — 探索发明家与发明的故事 【核心技能】 • 听：听懂关于发明与发明的对话和访谈 • 说：谈论最有用的发明、描述其外形和用途 • 读：理解说明性文章《An Invention That Changed the World》 • 写：用被动语态介绍一项发明的背景、过程与影响 • 语法：一般过去时、一般现在时、含情态动词的被动语态 本单元通过 Super See、Smart Cook、3D printer、radio、papermaking 等发明，引导学生学习被动语态并感悟创意力量。 What changes can inventions bring to our lives? SECTION A Section A 核心词汇 【常见发明】 • plane 飞机 • camera 照相机 • laptop 笔记本电脑 • mobile phone 移动电话 • TV 电视 • high-speed train 高铁 【发明相关动词】 • invent 发明 • design 设计 • produce 生产；制造 • create 创造；创作 • send 发送；寄 • connect 连接 • develop 发展；开发 【拓展发明】 • Super See 超级眼镜（太阳镜式智能设备） • Smart Cook 智能烹饪机 • 3D printer 3D打印机 • radio 收音机；无线电 • paper 纸 • papermaking 造纸术 【重点短语】 • be used for 被用于…… • be used to do 被用来做…… • be made of / from 由……制成 • be connected to 被连接到…… • be added by 被……添加 • be designed to 被设计用来…… Section A 听力：3D 打印技术 【对话背景】 Han Lin 去参观了一个科技博物馆，3D printer 是他最喜欢的发明。 【3D 打印过程】（被动语态） 1. The object is designed on the computer. 物体先在电脑上被设计。 2. A file is created by the computer. 电脑生成文件。 3. The file is sent to the 3D printer. 文件被发送到3D打印机。 4. The object is read by the 3D printer. 物体被打印机读取。 5. The object is produced by building up plastic. 通过堆叠塑料，物体被制造出来。 【3D打印机能制造的东西】 • toys, chairs, tables, and even houses • 还能制造：medicine, arms and legs, hearts, shoes, food 等 【语言点】 — 描述步骤时，被动语态突出动作的承受者（the object / the file）。 — by + 动作执行者：by the computer, by the 3D printer Section A 对话：最有用的发明 【对话人物】Peter & Fu Xing 【核心观点】 • Peter 认为最有用的发明是 the radio。 — Before the radio was invented, information travelled very slowly. 在收音机发明之前，信息传播非常缓慢。 — The world was made much smaller by the radio. 收音机让世界变得小了很多。 — News could be spread around the world in seconds. 新闻可以在几秒内传遍世界。 【发明家】Guglielmo Marconi 古列尔莫·马可尼 — An Italian inventor called Guglielmo Marconi. — He developed the idea in the 1890s. — In 1901, a radio message was sent across the Atlantic Ocean for the first time. 【影响】 — The radio also had a big effect on music. — It made it much easier for people to enjoy music from artists around the world. 语法聚焦：被动语态 Passive Voice 【定义】 把动作承受者放在主语位置，动作执行者由 by 引出。 【基本结构】be + 过去分词 (done) 【时态变化】 ▸ 一般现在时：am / is / are + done — A mini-camera is connected to the front of the glasses. ▸ 一般过去时：was / were + done — A radio message was sent across the Atlantic Ocean in 1901. ▸ 含情态动词：can / may / must / should + be + done — Toys, chairs, tables, and even houses can all be made by the 3D printer. ▸ 一般将来时：will be + done（本单元拓展） — The idea will be turned into reality in the future. 被动语态：用法与典型例句 【使用场景】 • 不知道动作执行者是谁 • 强调动作的承受者，而非执行者 • 描述科学过程、发明历史、客观事实 【主动 → 被动 转换】 ▸ People use paper every day. → Paper is used by people every day. ▸ Cai Lun invented papermaking. → Papermaking was invented by Cai Lun. ▸ The machine can produce many things. → Many things can be produced by the machine. 【课本例句】 • The oil and salt are also added by the machine itself. • Some other important inventions were developed as well. • The Qinghai–Xizang Railway was completed in 2006. 【注意】 — 主语是复数时用 are / were；主语是单数时用 is / was。 — 情态动词后必须用 be + 过去分词。 How do we turn ideas into reality? SECTION B Section B 阅读精讲：An Invention That Changed the World 【文章主题】 介绍中国古代四大发明之一——造纸术（papermaking）及其对世界的影响。 【段落大意】 ▸ Para 1: Papermaking shaped the modern world. 造纸术塑造了现代世界。 ▸ Para 2: Early materials to write on. 早期书写材料。 ▸ Para 3: Cai Lun's creative idea. 蔡伦的创意。 ▸ Para 4: Cai Lun's experiment was successful. 蔡伦实验成功。 ▸ Para 5: How paper changed the world. 纸张如何改变世界。 【核心人物】Cai Lun 蔡伦 — head officer of the palace workshop for the emperor in the Eastern Han Dynasty — 东汉宫廷作坊负责人，通过观察树皮、植物和旧衣服等获得灵感。 阅读精讲：蔡伦造纸过程与传播 【蔡伦造纸五步骤】 1. All the ingredients were mixed and boiled in water. 所有原料被混合并在水中煮沸。 2. The material was beaten, cut up, and mixed with water again. 材料被捣碎、切碎，再次与水混合。 3. The liquid was poured over a bamboo screen, leaving just the fibre. 液体被倒在竹筛上，只留下纤维。 4. The fibre was dried and pressed to form paper. 纤维被晾干、压制，形成纸张。 5. In 105 CE, Cai Lun showed his creation to the emperor. 公元105年，蔡伦将这一发明呈献给皇帝。 【纸张的优点】 — soft, light, easy to make and use, and most importantly, cheap — 柔软、轻便、易于制作和使用，最重要的是便宜 【造纸术的传播】 — 先传到中国周边国家，最终在12世纪经阿拉伯国家传入欧洲。 — 与印刷术结合，促进了书籍数量激增，带来知识的复兴。 阅读策略：Understanding Reference Words 【定义】 Reference words（指代词）是指代前文中出现的人、事物或观点的代词。 理解指代词有助于把握文章结构和逻辑连接。 【常见指代词】 • it / its 它/它的 • he / him / his 他/他的 • this / that 这个/那个 • these / those 这些/那些 • such 这样的 【课本实例】 ▸ "It" in Paragraph 1: 指代 papermaking（造纸术） ▸ "his" in Paragraph 3: 指代 Cai Lun's（蔡伦的） ▸ "It" in Paragraph 5: 指代 the use of paper and printing（纸张与印刷术的使用） ▸ "This" in Paragraph 5: 指代前句 "rapid increase in the number of books" 【解题技巧】 — 向前寻找：指代词通常指代最近出现的名词或名词短语。 — 确认单复数：it/this 指代单数；they/these 指代复数。 词汇运用：词性转换 【Noun → Verb → Adjective】 • collection (n.) collect (v.) collected (adj.) • creativity (n.) create (v.) creative (adj.) • invention (n.) invent (v.) invented (adj.) 【product → produce】 • product (n.) 产品 production (n.) 生产 produce (v.) 生产 produced (adj.) 被生产的 【易混词】 • invent（发明）—— 创造新事物 • discover（发现）—— 找到已存在的事物 【重点短语】 • result in 导致；造成 • to one's surprise 令某人惊讶的是 • a piece of 一块；一张；一片 • stand up 站起来 写作指导：介绍一项发明 【写作任务】 选择一项发明（如飞机、电话、造纸术等），用被动语态介绍其发明过程和影响。 【写作框架】 ▸ Paragraph 1: What was invented? 发明了什么？ — The ... was invented by ... in ... ▸ Paragraph 2: Why was it invented? 为什么被发明？ — It was invented because ... / To solve the problem of ... ▸ Paragraph 3: How was it invented? 如何被发明？ — ... was used / was made / was developed / was added ▸ Paragraph 4: What was its effect? 有什么影响？ — It has made ... easier / faster. It has changed ... 【范文示例：飞机】 • The plane was invented by Orville and Wilbur Wright in December 1903. • They wanted to fly like birds. • They learned from birds and added an engine to the glider. • The invention has made travel and communication much easier. 项目活动：Come up with your invention 【任务】为学校发明展设计一项发明，并制作海报。 【可选发明领域】 • green technology 绿色科技 • natural disasters 自然灾害应对 • taking care of elderly people 养老护理 • health 健康 • education 教育 • farming 农业 【发明要求】 1. inexpensive 价格低廉 2. easy to operate 易于操作 3. benefit people and society 造福人与社会 项目活动：Come up with your invention 【海报内容】 ▸ the name of the invention 发明名称 ▸ a picture of it 发明图片 ▸ what it is made of / from 制作材料 ▸ what it is used for 用途 ▸ what effect it has on people's lives 对生活的影响 核心句型 【谈论发明】 ▸ What do you think is the most useful invention of all time? 你认为有史以来最有用的发明是什么？ ▸ It has to be the radio. 一定是收音机。 ▸ What was invented? / Who was it invented by? / When was it invented? 【被动语态】 ▸ A mini-camera is connected to the front of the glasses. ▸ The oil and salt are also added by the machine itself. ▸ A radio message was sent across the Atlantic Ocean for the first time in 1901. ▸ Toys, chairs, tables, and even houses can all be made by the 3D printer. 【描述发明过程】 ▸ All the ingredients were mixed and boiled in water. ▸ The material was beaten, cut up, and mixed with water again. ▸ The liquid was poured over a bamboo screen, leaving just the fibre. ▸ The fibre was dried and pressed to form paper. 单元总结 【主题】Power of Ideas — 发明与创意如何改变世界 【核心语法】 • 被动语态：be + 过去分词 • 一般现在时、一般过去时、含情态动词的被动语态 【重点阅读】 • An Invention That Changed the World — 蔡伦与造纸术 • 阅读策略：Understanding reference words（指代词） 【写作输出】 • 介绍一项发明：What / Who / When / Why / How / Effect 【文化意识】 • 了解中国古代四大发明之一造纸术对世界文明的贡献 • 认识马可尼、蔡伦、莱特兄弟等发明家的创新精神 【名言】 • Creativity is seeing what others see and thinking what no one else has ever thought. Thanks for learning! Unit 5 Power of Ideas 创意改变生活，发明成就未来 $