Unit 6 When was it invented?Section B (3a-Self Check) 课件（28张PPT）

R·九年级上册 Unit 6 When was it invented? Section B 3a—Self Check Review 一般过去时被动语态 一般过去时的被动语态表示过去某一时刻发生的被动性动作，其基本结构为： 主语+ was / were + 过去分词+ by ... 翻译：他们两年前看过这位老师。 The teacher was visited by them two years ago. 主动变被动解题步骤： 1. 找宾语 ——— 2. 判断宾语的单复数 ——— 3. 判断动词的时态 ——— 4. 修改谓语的时态 ——— 5. 修改原句的主语 ——— 即动作的承受者 即be动词的单复数 即be动词的时态 即原句动词改为过去分词 即by + 主语/ 宾语 be要随着主语变 逻辑主语by来引 1. Tom broke the window.?? The window was broken by Tom. 2. He broke the windows.? The windows were broken by him. 3a Think of something that you do not like to do. Then think of an invention that could help you. Make notes. ? Problem: _____ New invention: _____ What it is used for: _____ quickly taking notes in class a special pen Imagine you are a business person. Write a description of your new invention. Try to sell the invention to the class. 3b This special pen was invented by Liu Jie. It has three colors and is used for… This special pen was invented by Liu Jie. It has three colors and is used for taking notes quickly. It is very useful if you have a lot to write down. The pen comes with(自带) a microchip that can store a list of common words that you will use. You can program the words you will use often into the microchip’s Sample writing memory, then assign(分配) a short form to each word. When you are writing, you just need to write the short forms with the pen, press a button on the pen and the short forms will change into the actual words. The microchip can contain up to 50 words and you can make changes to the list of words whenever you need to. As you pour in your hot drink, the color changes. Color changing cup Smart and creative inventions It’s then safe for young children to eat the fruit. It’s convenient. 计算机在我们的生活、工作中的作用越来越大，你知道计算机的起源与发展吗？请结合计算机的发明时间(1946年）、外形、用途等方面，谈一下它的发展变化，并说明你对未来计算机的畅想。 要求：1.意思连贯，语句通顺；词数不少于80。 练一练 这是一篇事物介绍类的说明文，根据题目提示可考虑采用下面的模板。 计算机 引出话题 介绍发明 畅想未来 ... important in our daily life. 时间:The computer was invented in ... 外形：... was huge. 用途:send some messages ... open ... I think computers are going to ... Computer Computers are becoming more and more important in our daily life. Do you know when the computer was invented? The computer was invented in 1946. At that time, it was huge. With the development of science and technology, the computer has grown smaller. Now there are many kinds of computers, such as personal computers and laptops. The computer is a very useful tool in our life. 【参考范文】 For example , it can send some messages to foreign friends by e-mail. What’s more, it can share information with others through the World Wide Web. We can also listen to music or play the game on computers. It makes us relax. It’s h ... ...