Unit 2 Great inventions and discoveries 书面表达10篇（单元话题：发明与创造）-2025-2026学年八年级英语下学期单元重难点易错题精练（沪教版（五四学制））

Unit 2 Great inventions and discoveries 书面表达10篇 内容导航 单元话题 基础语篇练习 重难语篇练习 单元话题聚焦 发明与创造 基础语篇练习 稳扎稳打 必拿分数：聚焦稳拿分数题目，确保基础分值 重难语篇练习 突破瓶颈 争夺高分：聚焦高难度题目，争夺关键分数 基础语篇练习 1．科技的发展日新月异，请你以“I want to invent ________”为题，展开想象写一篇短文，谈谈你想发明什么，描述这样东西以及发明它的意义。短文不少于60词。 ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 2．当今科技日新月异，各种发明不断涌现。高科技产品在我们的生活中不可或缺，如智能手机(smart phone)、自动语音识别技术(ASR)等； 服务类产品也蓬勃发展， 如网上购物(online shopping)，移动支付(mobile payment)，共享单车(bike sharing)等。请你介绍一款你认为重要的发明，简单描述它并说明你选择它的原因。 要求： 1.要点齐全， 可适当发挥； 2.语句通顺、书写规范； 3.词数： 90 词左右； 4.文中不得出现真实的姓名和校名。 参考词汇： benefit 益处 ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 3．世界上有很多发明，它们正在渐渐地改变我们的生活方式。英语课上，同学们正在准备以“The Invention that Influences My Life Most”为主题的演讲活动。请你以李华的名义写一篇演讲稿，向同学们介绍一项对你生活影响最大的发明。 提示： What is the invention that influences your life most? How does it influence your life? What are your feelings about it? 要求：(1) 演讲稿须包括所有提示内容，可适当发挥；(2) 演讲词中不得出现真实的地名、校名和人名；(3) 词数80左右。开头和结尾已给出，不计入总词数。 Hello, everyone! I am Li Hua and I’m very happy to stand here to talk about an invention that influences my life most. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Thanks for your attention! 4．好奇心能带来新的发明创造，而这些发明创造又推动着社会的进步与发展。你对哪一项发明印象深刻？请你写一篇英语短文分享你的观点。 内容提示：(1)What’s your opinion about curiosity? (2)Give an example to prove your opinion. (3)What’s your goal or plan for the future? 要求：(1)中心突出，语意连贯，层次清晰，书写规范； (2)文中不得出现真实的姓名； (3)词数80左右。 ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 5．假如你是李华，你所在的阳光中学举办了一个“未来发明家”的科创比赛，你的发明是一种能够帮助中学生学习的工具。请你根据以下提示写一篇演讲稿，介绍你的发明。 演讲稿需包含以下内容： An invention for study tools What’s the name? What does it look like? What can it do? How does it work? Your feelings about the competition. _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 6．3D打印技术快速发展，给残障人士的生活带来了巨大的便利。请根据以下提示，以“A helping hand”为题，写一篇英文短文。 要点： 1. Easton在16岁生日时得到了一台3D打印机。有了它，他发明了一个假肢 (an artificial arm)。但这条手臂重达3.6公斤 (kilogram)。 2. Easton一直在努力。最终，他在23岁时获得了成功。他的设计仅重0.5公斤，成本约为$500！ Easton的发明帮助了许多孩子。他决定把他的设计免费发到网上！人们可以下载设计并使用自己的3-D打印机制作假肢！ 3.真是一只援助之手！ 要求： 1. 可根据提示适当发挥，文中不得出现真实姓名和学校名称； 2. 词数不少于70。 __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 7．学校英语社团下周活动主题为“My invention”。假设你是社团成员李华，你计划向同学介绍你的发明。请你根据以下问题完成一篇短文。 我的发明My invention 1.What is the name? 2.What does it look like? 3. What can it do? ①……；②……(请补充 2 个特点)： 4.How does it work? ①……；②……(请补充 2 点运行方式) 5.What do you think of your invention? (请补充 2 点评价) 【要求】 1. 词数80左右； 2. 要点齐全，可适当发挥； 3. 不得出现真实姓名和学校； 4. 条理清楚，语句通顺，意义连贯，书写规范。 My invention ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 8．假设你是李华，你学校的英文社团正在开展题为“发明改变生活”的征文活动。请你写一篇短文进行投稿。 写作要点： 1. 简单介绍一项发明； 2. 讲述这项发明的影响及意义。 写作要求： 1. 词数80左右(开头已给出，不计入总词数)； 2. 内容必须包含所有写作要点，可适当发挥。 There have been many great inventions in history. _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 重难语篇练习 9．你们班开展了一次以“The Most Useful Invention in My Daily Life”为主题的英语演讲比赛，请你准备发言稿，与同学们分享。写作要点： 1.你认为日常生活中最有用的发明是什么？ 2.你为什么认为它最有用？（play an important role in…，serve as…） 3.它是怎样改变你的或者其他人的生活的？（convenient, make life much easier, make a great difference to…） 4.…… 注意：1.必须包含所有提示内容，可适当发挥，使文章内容通顺、完整； 2.100词左右。 The Most Useful Invention in My Daily Life Good morning, everyone! The most useful invention in my daily life is undoubtedly ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 10．你参加了“世界发明探索营”，请根据以下提示，写一篇80~100词的英文报告，介绍一项改变世界的发明。 提示： 1. 你介绍的发明是什么； 2. 它是谁/何时发明的； 3. 它如何改变人们的生活。 _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 学科网（北京）股份有限公司 $ Unit 2 Great inventions and discoveries 书面表达10篇 内容导航 单元话题 基础语篇练习 重难语篇练习 单元话题聚焦 发明与创造 基础语篇练习 稳扎稳打 必拿分数：聚焦稳拿分数题目，确保基础分值 重难语篇练习 突破瓶颈 争夺高分：聚焦高难度题目，争夺关键分数 基础语篇练习 1．科技的发展日新月异，请你以“I want to invent ________”为题，展开想象写一篇短文，谈谈你想发明什么，描述这样东西以及发明它的意义。短文不少于60词。 ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【答案】例文： I Want to Invent a Smart Environmental Protector I want to invent a Smart Environmental Protector. It is a small, portable device that can detect air and water pollution in real time. It connects to phones and sends warnings when pollution levels are too high. It also collects and processes waste into clean energy. This invention will help people live healthier lives and protect the planet. With it, we can take timely action against pollution and make the world a greener place. 【详解】[总体分析] ①题材：本文是一篇话题作文； ②时态：时态为“一般现在时”和“一般将来时”； ③提示：需描述想发明的东西、它的外观与功能，并说明其意义。 [写作步骤] 第一步，补充题目，确定想发明的事物，并直接点明主题； 第二步，描述该发明物的外观和功能； 第三步，阐述发明的意义。 [亮点词汇] ①invent发明 ②portable便携的 ③pollution污染 [高分句型] ①It connects to phones and sends warnings when pollution levels are too high. (运用when引导时间状语从句) ②This invention will help people live healthier lives and protect the planet. (运用形容词比较级结构) 2．当今科技日新月异，各种发明不断涌现。高科技产品在我们的生活中不可或缺，如智能手机(smart phone)、自动语音识别技术(ASR)等； 服务类产品也蓬勃发展， 如网上购物(online shopping)，移动支付(mobile payment)，共享单车(bike sharing)等。请你介绍一款你认为重要的发明，简单描述它并说明你选择它的原因。 要求： 1.要点齐全， 可适当发挥； 2.语句通顺、书写规范； 3.词数： 90 词左右； 4.文中不得出现真实的姓名和校名。 参考词汇： benefit 益处 ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【答案】例文 In today’s rapidly advancing world, many inventions have become essential in our daily lives. Among them, I believe the smartphone is one of the most important inventions. The smartphone can connect to the Internet, allowing us to search for and store information easily. It also enables us to communicate with our family and friends through video calls and messages anytime, anywhere. Moreover, smartphones support various applications like online shopping, mobile payment, and bike sharing, making our lives more convenient. The benefits of smartphones are numerous, as they save us time and provide us with endless possibilities. Therefore, I think the smartphone is a crucial invention that has significantly improved our quality of life. 【总体分析】① 题材：本文是一篇话题作文； ② 时态：一般现在时； ③ 提示：写作时必须要描述这项发明，并说明它的益处。 【写作步骤】第一步，点明观点，认为智能手机是重要的发明； 第二步，描述智能手机的功能和带来的便利，如上网、视频通话、信息存储、支持各种应用等； 第三步，总结智能手机的益处，强调其对生活质量的提升。 【亮点词汇】① rapidly快速地 ② invention发明 ③ essential基本的 ④ search for搜索 ⑤ store存储 ⑥ communicate交流 ⑦ convenient方便的 ⑧ benefit益处 【高分句型】①In today’s rapidly advancing world, many inventions have become essential in our daily lives. (现在完成时) ②The smartphone can connect to the Internet, allowing us to search for and store information easily. (非谓语动词) ③Therefore, I think the smartphone is a crucial invention that has significantly improved our quality of life. (宾语从句) 3．世界上有很多发明，它们正在渐渐地改变我们的生活方式。英语课上，同学们正在准备以“The Invention that Influences My Life Most”为主题的演讲活动。请你以李华的名义写一篇演讲稿，向同学们介绍一项对你生活影响最大的发明。 提示： What is the invention that influences your life most? How does it influence your life? What are your feelings about it? 要求：(1) 演讲稿须包括所有提示内容，可适当发挥；(2) 演讲词中不得出现真实的地名、校名和人名；(3) 词数80左右。开头和结尾已给出，不计入总词数。 Hello, everyone! I am Li Hua and I’m very happy to stand here to talk about an invention that influences my life most. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Thanks for your attention! 【答案】例文： Hello, everyone! I am Li Hua and I’m very happy to stand here to talk about an invention that influences my life most. The invention is the smartphone. I can use it to keep in touch with my family and friends through video calls, even when we’re far apart. When I have study problems, I can search for answers or watch online courses easily. Also, it allows me to listen to music and take photos, making my life more convenient. I feel really lucky to live in such a technological age. The smartphone is not just a tool but a good helper that makes my life better. Thanks for your attention! 【详解】[总体分析] ①题材：本文是一篇讲稿； ②时态：时态为“一般现在时”； ③提示：写作要点已给出，不得遗漏，可适当增加细节，以使行文连贯。 [写作步骤] 第一步：开门见山，点明主题； 第二步：详细描述这项发明及其影响，与自己的感受； 第三步：书写结尾，表达感谢。 [亮点词汇] ①keep in touch with与……保持联系 ②online courses在线课程 ③more convenient更便利 ④a good helper一个好帮手 [高分句型] ①When I have study problems, I can search for answers or watch online courses easily.(时间状语从句) ②The smartphone is not just a tool but a good helper that makes my life better.(定语从句) 4．好奇心能带来新的发明创造，而这些发明创造又推动着社会的进步与发展。你对哪一项发明印象深刻？请你写一篇英语短文分享你的观点。 内容提示：(1)What’s your opinion about curiosity? (2)Give an example to prove your opinion. (3)What’s your goal or plan for the future? 要求：(1)中心突出，语意连贯，层次清晰，书写规范； (2)文中不得出现真实的姓名； (3)词数80左右。 ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【答案】 例文 Curiosity is the key to new inventions. It pushes us to ask questions constantly and find their answers. For example, Thomas Edison was curious about light. He tried thousands of materials and finally invented the light bulb. This invention changed the world totally by bringing light to darkness. In the future, I plan to stay curious and study science hard. I hope to invent something useful to help people live better lives. Let’s keep our curiosity alive! 【详解】[总体分析] ①题材：本文是一篇材料作文； ②时态：主要运用“一般现在时”和“一般过去时”； ③提示：写作要点已给出，考生应注意不要遗漏题目要求中每一项内容，适当添加细节，并突出写作重点。 [写作步骤] 第一步：引出话题，表明好奇心是新的发明创造的关键； 第二步：根据内容提示详细介绍对好奇心的看法，举例证明观点，并阐述未来目标或计划； 第三步：书写结语，呼吁保持好奇心。 [亮点词汇] ①the key to……的关键 ②for example例如 ③plan to do sth.计划做某事 [高分句型] ①I hope to invent something useful to help people live better lives.（动词不定式作宾语和目的状语） 5．假如你是李华，你所在的阳光中学举办了一个“未来发明家”的科创比赛，你的发明是一种能够帮助中学生学习的工具。请你根据以下提示写一篇演讲稿，介绍你的发明。 演讲稿需包含以下内容： An invention for study tools What’s the name? What does it look like? What can it do? How does it work? Your feelings about the competition. _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【答案】例文 My Invention: The StudyPal Hello everyone! I’m Li Hua. Today, I’ll introduce my invention for the “Future Inventor” competition—the StudyPal. It is a small, smart device that looks like a flat disk. It’s light and easy to carry. The StudyPal is very helpful. It can explain difficult math problems and help you remember English words quickly. It works by using AI to answer your questions. I’m very proud to join this competition. It was a wonderful experience to create something that can help students with their studies. Thank you! 【详解】[总体分析] ①题材：本文是一篇演讲稿； ②时态：主要运用“一般现在时”和“一般过去时”； ③提示：写作要点已明确给出，考生应注意不要遗漏每一项内容，适当添加细节，并突出写作重点。 [写作步骤] 第一步：引出话题，简要介绍自己和即将介绍的发明； 第二步：根据提示内容详细介绍发明的名称、外观、功能以及工作原理； 第三步：书写结语，表达自己对参加比赛的感受。 [亮点词汇] ①look like看起来像 ②be proud to do sth.很自豪做某事 [高分句型] ①It is a small, smart device that looks like a flat disk.（that引导的定语从句） 6．3D打印技术快速发展，给残障人士的生活带来了巨大的便利。请根据以下提示，以“A helping hand”为题，写一篇英文短文。 要点： 1. Easton在16岁生日时得到了一台3D打印机。有了它，他发明了一个假肢 (an artificial arm)。但这条手臂重达3.6公斤 (kilogram)。 2. Easton一直在努力。最终，他在23岁时获得了成功。他的设计仅重0.5公斤，成本约为$500！ Easton的发明帮助了许多孩子。他决定把他的设计免费发到网上！人们可以下载设计并使用自己的3-D打印机制作假肢！ 3.真是一只援助之手！ 要求： 1. 可根据提示适当发挥，文中不得出现真实姓名和学校名称； 2. 词数不少于70。 __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【答案】 范文： 3D printing is changing lives. When Easton was 16, he got a 3D printer for his birthday. He made an artificial arm with it, but it weighed 3.6 kilograms—too heavy for daily use. However, Easton didn’t give up. He worked hard for years. Finally, at age 23, he succeeded. His new design weighed only 0.5 kilograms and cost just about $500! It was light and cheap. Easton’s invention has helped many children. He decided to share his design online for free. Now, anyone can download it and print their own artificial arm at home. What a helping hand! Easton shows us how technology and kindness can work together to make the world better. 【详解】[总体分析] ①题材：本文是一篇材料作文； ②时态：主要使用一般过去时； ③提示：需根据要点完整叙述Easton从16岁到23岁改进假肢设计的过程，突出其重量与成本的变化、发明的帮助作用及共享设计的意义，可适当发挥。 [写作步骤] 第一步，开篇点明3D打印技术的社会价值； 第二步，按时间顺序叙述Easton的探索历程（16岁获得打印机、初代假肢过重、坚持改进、23岁成功）； 第三步，强调新一代设计的优点（重量轻、成本低）； 第四步，说明发明的实际帮助和Easton的共享行为； 第五步，总结赞扬其技术与人性的结合。 [亮点词汇] ①changing lives改变生活 ②artificial arm假肢 ③worked hard for years多年努力 ④share his design online for free免费在线分享设计 [高分句型] ①When Easton was 16, he got a 3D printer for his birthday. (when引导时间状语从句) ②…but it weighed 3.6 kilograms—too heavy for daily use. (破折号引出补充说明) ③Easton shows us how technology and kindness can work together to make the world better. (how引导宾语从句，不定式作目的状语) 7．学校英语社团下周活动主题为“My invention”。假设你是社团成员李华，你计划向同学介绍你的发明。请你根据以下问题完成一篇短文。 我的发明My invention 1.What is the name? 2.What does it look like? 3. What can it do? ①……；②……(请补充 2 个特点)： 4.How does it work? ①……；②……(请补充 2 点运行方式) 5.What do you think of your invention? (请补充 2 点评价) 【要求】 1. 词数80左右； 2. 要点齐全，可适当发挥； 3. 不得出现真实姓名和学校； 4. 条理清楚，语句通顺，意义连贯，书写规范。 My invention ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【答案】范文： My invention My invention is a smart umbrella. The smart umbrella looks like a common umbrella. But there is a camera inside it. With it, we can use the umbrella to take photos. It can also play music for us. Besides, the umbrella can dry itself really soon, so it won’t make things wet on rainy days. We can just use our voice to control it. If we shout “open”, the umbrella will start to work. What’s more, the umbrella uses solar power instead of batteries. My invention is useful, convenient and green.   【详解】[总体分析] ①题材：本文是一篇材料作文，为说明文。 ②时态：时态为“一般现在时”； ③提示：需覆盖名称、外观、功能、工作原理、评价。 [写作步骤] 第一步，介绍发明名称和基础外观； 第二步，说明功能，并对应操作方式； 第三步，从实用性和环保性评价发明。 [亮点词汇] ①look like看起来像 ②take photos拍照 ③instead of而不是 [高分句型] ①Besides, the umbrella can dry itself really soon, so it won’t make things wet on rainy days. (so引导结果状语从句) ②If we shout “open”, the umbrella will start to work. (if引导的条件状语从句) 8．假设你是李华，你学校的英文社团正在开展题为“发明改变生活”的征文活动。请你写一篇短文进行投稿。 写作要点： 1. 简单介绍一项发明； 2. 讲述这项发明的影响及意义。 写作要求： 1. 词数80左右(开头已给出，不计入总词数)； 2. 内容必须包含所有写作要点，可适当发挥。 There have been many great inventions in history. _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【答案】One possible version: There have been many great inventions in history. I think the first great invention is the wheel (车轮). It is still very important today. It was invented a few thousand years ago and it was made of wood at that time. However, the inventor is still unknown. This invention has made travelling faster and made it easier to carry heavy things. With wheels, people can travel long distances (距离) to farther places. People can trade things between different places. It helps humans develop in a great way. 【总体分析】①题材：本文是一篇材料作文； ②时态：主要为一般过去时和一般现在时； ③提示：简单介绍一项发明，讲述这项发明的影响及意义。 【写作步骤】第一步：用开头句引出主题； 第二步：具体介绍这项发明的时间、制作材料和作用等； 第三步：介绍这项发明的影响及意义。 【亮点词汇】①be made of由……制成 ②unknown未知的 ③all around the world世界各地 【高分句型】①It was invented a few thousand years ago and it was made of wood at that time.（一般过去时的被动语态） ②I think the first great invention is the wheel.（宾语从句） 重难语篇练习 9．你们班开展了一次以“The Most Useful Invention in My Daily Life”为主题的英语演讲比赛，请你准备发言稿，与同学们分享。写作要点： 1.你认为日常生活中最有用的发明是什么？ 2.你为什么认为它最有用？（play an important role in…，serve as…） 3.它是怎样改变你的或者其他人的生活的？（convenient, make life much easier, make a great difference to…） 4.…… 注意：1.必须包含所有提示内容，可适当发挥，使文章内容通顺、完整； 2.100词左右。 The Most Useful Invention in My Daily Life Good morning, everyone! The most useful invention in my daily life is undoubtedly ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【答案】 例文 The Most Useful Invention in My Daily Life Good morning, everyone! The most useful invention in my daily life is undoubtedly the smartphone. I believe it is the most useful because it plays an important role in almost everything I do. It serves as a phone, a camera, a map, and a learning tool all in one. I even use it to shop for daily things or order meals when I’m busy. It has greatly changed our lives. It makes communication convenient, helps us find information quickly, and makes life much easier. Truly, it has made a great difference to how we live, work, and connect with the world. In short, the smartphone is not just a device—it’s a window to the world. Thank you! 【详解】[总体分析] ①题材：本文是一篇发言稿； ②时态：时态主要为“一般现在时”； ③提示：写作要点已明确给出，包括介绍日常生活中最有用的发明、说明其最有用的原因以及阐述它如何改变生活。考生应注意不要遗漏这些要点，并适当添加细节，突出写作重点。 [写作步骤] 第一步，表明写作意图。直接点明“The most useful invention in my daily life is undoubtedly the smartphone”，引出重点介绍的内容——智能手机； 第二步，具体阐述写作内容。从“plays an important role in almost everything I do”以及“serves as a phone, a camera, a map, and a learning tool all in one”等方面说明认为智能手机最有用的原因；通过“makes communication convenient, helps us find information quickly, and makes life much easier”阐述智能手机如何改变生活； 第三步，书写结语。用“In short, the smartphone is not just a device—it’s a window to the world”总结智能手机的重要性，并表达“Thank you!”结束演讲，表达希望与同学们分享观点的意愿。 [亮点词汇] ①undoubtedly无疑地，确定地 ②play an important role in…在……中扮演重要角色 ③serve as充当，用作 ④make a great difference to…对……产生巨大影响 [高分句型] ①I believe it is the most useful because it plays an important role in almost everything I do.（原因状语从句） ②Truly, it has made a great difference to how we live, work, and connect with the world.（宾语从句） 10．你参加了“世界发明探索营”，请根据以下提示，写一篇80~100词的英文报告，介绍一项改变世界的发明。 提示： 1. 你介绍的发明是什么； 2. 它是谁/何时发明的； 3. 它如何改变人们的生活。 _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【答案】例文： One of the most important inventions that changed the world is the computer. It was first invented in 1946. Later, it was improved many times and became smaller and more powerful. The computer has greatly changed our life. In the past, people did calculations and kept records by hand, which was slow and easy to make mistakes. Now, computers can finish these tasks quickly. Also, we can use computers to study, work and communicate with others online. It makes the world a smaller place. I think the computer is really a wonderful invention that helps us live a better life. 【详解】[总体分析] ①题材：本文是一篇材料作文； ②时态：一般过去时和一般现在时 ； ③提示：围绕电脑展开，介绍其发明者、时间以及如何通过即时沟通改变生活。   [写作步骤] 第一步：介绍发明名称及参加活动背景； 第二步：说明发明者及时间； 第三步：用具体例子描述生活改变。 [亮点词汇] ①do calculations进行计算 ②make mistakes犯错 ③communicate with与……沟通 [高分句型] ①It was first invented in 1946. (被动语态) ②In the past, people did calculations and kept records by hand, which was slow and easy to make mistakes. (which引导非限制性定句从句) ③I think the computer is really a wonderful invention that helps us live a better life. (宾语从句) 学科网（北京）股份有限公司 $