Unit 4 Inventions 写作学案 2025-2026学年沪教版英语八年级上册

Unit 4 Inventions 写作学案 【写作导引】 本单元以“Inventions”为核心话题，围绕“伟大发明的特征、发明对生活的影响、设计新发明”展开，核心聚焦“用英语介绍发明、阐述发明的价值、描述自己的发明创意”，运用不规则形容词比较级和最高级（good/bad/far）、(not) as … as 结构 等语法知识，搭配发明相关核心词汇与逻辑句型，提升八年级学生的说明类写作创新性和表达准确性。常见写作角度包括：① 介绍历史上的伟大发明及影响；② 描述生活中的趣味发明；③ 设计新发明并阐述其功能与价值；④ 分析发明的成功要素。所有内容严格贴合课本话题、词汇与语法要求，适配八年级学生认知水平，可直接用于课堂同步训练。 【单元话题】 “我的新发明创意”。请根据课本“Writing”板块范例，设计一项新发明，写一篇短文介绍它的外观、功能、优势及对生活的帮助，词数80-100左右，题目为“My New Invention: [Invention Name]”。 ________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【范文】 My New Invention: The Smart Plant Care Device My new invention is the Smart Plant Care Device, a practical tool for plant lovers. It is small and round, with a soil sensor and a mini water tank. It works automatically: when the sensor finds the soil is dry, it will water the plant slowly. It is not as big as traditional watering cans, so it can fit on any windowsill. Compared with other devices, it is better at saving water—you don’t have to worry about over-watering. What’s more, it can send a message to your phone when the water tank is empty. This invention is very useful for busy people or those who are not good at taking care of plants. It makes plant care easier and helps more people enjoy the beauty of greenery. 【译文】 我的新发明：智能植物养护器 我的新发明是智能植物养护器，一款专为植物爱好者设计的实用工具。 它小巧圆润，配有土壤传感器和迷你水箱，能自动工作：当传感器检测到土壤干燥时，会缓慢给植物浇水。它不像传统浇水壶那么大，所以能放在任何窗台上。与其他设备相比，它在节水方面更出色——你不必担心浇水过多。此外，当水箱缺水时，它还能向你的手机发送提醒信息。 这项发明对忙碌的人或不擅长养护植物的人非常实用，它让养植物变得更简单，也能让更多人享受绿色带来的美好。 亮点词块 1.soil sensor 土壤传感器 2.mini water tank 迷你水箱 3.work automatically 自动工作 4.fit on windowsill 适配窗台 5.save water 节水 6.over-watering 浇水过多 7.send a message 发送信息 高分句子 1.It is not as big as traditional watering cans, so it can fit on any windowsill.（用(not) as … as 结构对比新旧产品，突出发明的优势，贴合单元语法重点） 2.Compared with other devices, it is better at saving water—you don’t have to worry about over-watering.（用不规则形容词比较级强调核心优势，逻辑清晰） 3.It makes plant care easier and helps more people enjoy the beauty of greenery.（总结发明的价值，升华主题，符合八年级写作要求） 【拓展1】 班级要举办“伟大发明分享会”，请你写一段文字介绍中国古代四大发明之一——活字印刷术，包括其发明者、发明时间、工作原理及对世界的影响，词数不少于70。 Movable Type: A Great Ancient Chinese Invention ________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【拓展1范文】 Movable Type: A Great Ancient Chinese Invention Movable type is one of the greatest inventions in ancient China, invented by Bi Sheng during the Song Dynasty (1039–1048). The invention works in simple steps: first, carve Chinese characters on small clay blocks, bake them to make them hard; then arrange these blocks on a metal plate to form words and sentences; finally, print after brushing ink. Compared with the previous printing methods, movable type is far more efficient—it allows people to reuse characters and print books faster. This invention spread to Europe later, which helped promote the spread of knowledge and played a key role in the Renaissance. Movable type is not only a great technological breakthrough but also a bridge connecting different cultures. It shows the wisdom of ancient Chinese people. 【拓展1译文】 活字印刷术：中国古代的伟大发明 活字印刷术是中国古代最伟大的发明之一，由北宋时期（1039-1048年）的毕昇发明。 这项发明的工作原理很简单：首先在小块黏土上雕刻汉字，烘烤变硬；然后将这些字块排列在金属板上组成词句；最后刷墨印刷。与之前的印刷方式相比，活字印刷术效率高得多——它允许字块重复使用，印刷书籍的速度更快。这项发明后来传播到欧洲，推动了知识的传播，在文艺复兴中发挥了关键作用。 活字印刷术不仅是一项伟大的技术突破，更是连接不同文化的桥梁，彰显了古代中国人民的智慧。 【拓展2】 请根据以下提示，仿写“趣味发明介绍”短文，运用本单元核心语法，词数80左右，开头已给出。 提示 信息 核心内容 发明（便携折叠雨披）、外观（轻薄可折叠、多种颜色）、功能（防风防雨、收纳方便）、优势（比普通雨披更轻便、不占空间）、适用场景（通勤、旅行） 语言要求 运用 (not) as … as、good/bad/far 的比较级，贴合单元语法重点 The Portable Folding Raincoat: A Useful Daily Invention The portable folding raincoat is a creative invention that solves many troubles in daily life. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【拓展2范文】 The Portable Folding Raincoat: A Useful Daily Invention The portable folding raincoat is a creative invention that solves many troubles in daily life. It is made of thin but durable fabric, with bright colors like pink and blue. It can be folded into the size of a palm—much smaller than ordinary raincoats. It is as effective as traditional raincoats in keeping out wind and rain, but far more convenient to carry. You can put it in your bag or pocket, which is perfect for commuters and travelers. When it rains suddenly, you can take it out and wear it quickly. This invention is not only practical but also affordable. It makes people’s daily life easier and more convenient, so it has become very popular among young people. 【拓展2译文】 便携折叠雨披：实用的日常发明 便携折叠雨披是一项有创意的发明，解决了日常生活中的许多麻烦。 它由轻薄但耐用的面料制成，有粉色、蓝色等鲜艳颜色，可折叠成手掌大小——比普通雨披小得多。它在防风防雨方面和传统雨披一样有效，但携带起来方便得多。你可以把它放进包里或口袋里，非常适合通勤族和旅行者。当突然下雨时，你可以快速取出穿上。 这项发明不仅实用，而且价格实惠，让人们的日常生活更便捷，因此在年轻人中非常受欢迎。 本话题作文的一些实用短语与句型积累 一、核心主题词汇 1.发明与技术相关（单元重点） · 发明相关：invention 发明；inventor 发明家；create 创造；design 设计；develop 研发；practical 实用的；creative 有创意的；efficient 高效的；durable 耐用的；automatic 自动的 · 语法相关：不规则形容词比较级/最高级（good→better→best；bad→worse→worst；far→farther/further→farthest/furthest）；(not) as … as 结构 · 部件与功能：sensor 传感器；tank 容器；battery 电池；button 按钮；work automatically 自动工作；send messages 发送信息；save energy 节能；reuse 重复使用；promote 促进；spread 传播 · 对比表达：compared with 与……相比；be different from 与……不同；superior to 优于；more efficient than 比……更高效 1. 语法相关（单元重点） · 不规则形容词比较级/最高级用法： · good（好的）→ better（更好的）→ best（最好的）：This invention is better than the old one.（这项发明比旧的更好）；It is the best tool for students.（它是学生们最好的工具） · bad（坏的）→ worse（更坏的）→ worst（最坏的）：The quality of this product is worse than expected.（这个产品的质量比预期的差）；It was the worst invention of the year.（它是今年最差的发明） · far（远的/程度深）→ farther（更远的，表距离）/ further（更进一步的，表程度）→ farthest/furthest：This invention has a farther influence than we thought.（这项发明的影响比我们想象的更远）；We need further research on this technology.（我们需要对这项技术做进一步研究） · (not) as … as 结构用法： · 表示“和……一样……”：The new device is as useful as the traditional one.（这款新设备和传统设备一样实用） · 表示“不如……”：The old machine is not as efficient as the new one.（旧机器不如新机器高效） · 修饰数量：There are not as many parts in this invention as that one.（这项发明的零件没有那项多） 1. 表达类（单元基础） · 逻辑连接：and 和；but 但是；so 所以；because 因为；however 然而；what’s more 此外；for example 例如；compared with 与……相比；in addition 此外 · 常用短语：work automatically 自动工作；keep out 阻挡；fold into 折叠成；fit on 适配；take out 取出；play a key role in 在……中起关键作用；technological breakthrough 技术突破；daily life 日常生活；carry around 随身携带 二、实用句型积累 1.介绍发明基本信息（贴合单元核心） · [Invention Name] is a … invented by … in … [发明名称]是……于……年发明的……，例：The wheel is a great invention invented by ancient people in 3500 BCE.（车轮是古代人于公元前3500年发明的伟大发明） · It is … in size/shape, with … 它在尺寸/形状上……，配有……，例：It is small in size, with a built-in battery and a touch screen.（它体积小巧，配有内置电池和触摸屏） · Compared with …, it is … 与……相比，它……，例：Compared with traditional cameras, it is lighter and easier to use.（与传统相机相比，它更轻、更易用） 1. 描述发明功能与优势（贴合单元主题） · It can … and …, which helps … 它能……和……，这有助于……，例：It can detect air quality and send alerts, which helps people protect their health.（它能检测空气质量并发送警报，这有助于人们保护健康） · It is not as … as …, but it is better at … 它不如……，但在……方面更出色，例：It is not as fast as professional machines, but it is better at saving energy.（它不如专业机器快，但在节能方面更出色） · The greatest advantage of this invention is that … 这项发明最大的优势是……，例：The greatest advantage of this invention is that it can be reused many times.（这项发明最大的优势是可以多次重复使用） 1. 阐述发明的影响与意义（贴合单元内涵） · This invention has changed the way we … 这项发明改变了我们……的方式，例：This invention has changed the way we communicate with each other.（这项发明改变了我们彼此沟通的方式） · It plays an important role in … 它在……中起重要作用，例：It plays an important role in promoting environmental protection.（它在促进环保方面起重要作用） · It is not only … but also …, making … 它不仅……而且……，使得……，例：It is not only practical but also affordable, making it popular among people.（它不仅实用而且价格亲民，深受人们喜爱） 三、课堂实用句型 · 提问句型：What is your favorite invention?；Who invented it?；What is it used for?；How does it work?；Why is it a great invention?；How is it different from other inventions? · 回答句型：My favorite invention is the smartphone.；It was invented by Martin Cooper in 1973.；It is used for communication, taking photos and learning.；It works by connecting to the internet and using various apps.；Because it has changed people’s lives greatly.；It is smaller and more powerful than old mobile phones. 学科网（北京）股份有限公司 $