人教版九年级英语（上）Unit6第5课时(B3a-SelfCheck)教学课件

1、R九年级上册九年级上册Unit 6 When was it invented?Section B 3aSelf CheckReview一般过去时被动语态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：被动性动作，其基本结构为： 主语主语+ was / were + 过去分词过去分词+ by .翻译：他们两年前看过这位老师。翻译：他们两年前看过这位老师。 The teacher was visited by them two years ago. 主主动动变被变被动动解题步骤解题步骤：1. 找宾语找宾语 2. 判断

2、宾语的单复数判断宾语的单复数 3. 判断动词的时态判断动词的时态 4. 修改谓语的时态修改谓语的时态 5. 修改原句的主语修改原句的主语 即动作的承受者即动作的承受者即即be动词的单复数动词的单复数即即be动词的时态动词的时态即原句动词改为过去分词即原句动词改为过去分词即即by + 主语主语/ 宾语宾语be要随着主语变要随着主语变 逻辑主语逻辑主语by来引来引1. Tom broke the window. The window was broken by Tom.2. He broke the windows. The windows were broken by him. 3a3aThin

3、k 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 classa special penImagine you are a business person. Write a description of your new invention. Try to sell the invention t

4、o the class.3b3bThis special pen was invented by Liu Jie. It has three colors and is used forThis 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(自带自带) a microchip that can store a li

5、st of common words that you will use. You can program the words you will use often into the microchipsSample writingmemory, then assign(分配分配) 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 chang

6、e 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 cupSmart and creative inventionsIts then safe for young children to eat the fruit. Its convenient. 计算机在

7、我们的生活、工作中的作用越来越大，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？请结合计算机的发你知道计算机的起源与发展吗？请结合计算机的发明时间明时间(1946年）、外形、用途等方面，谈一下它年）、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。的发展变化，并说明你对未来计算机的畅想。 要求：要求：1.意思连贯，语句通顺；词数不少于意思连贯，语句通顺；词数不少于80。练一练练一练 这是一篇事物介绍类的说明文这是一篇事物介绍类的说明文，根据题目提示，根据题目提示可考虑采用下面的模板。可考虑采用下面的模板。计算机计算机引出话题引出话题介绍发明介绍发明畅想

8、未来畅想未来. important in our daily life.时间时间:The computer was invented in . 外形：外形：. was huge.用途用途: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

9、 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. 【参考范文参考范文】For example , it can send some messages to foreig

10、n friends by e-mail. Whats 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. Its hard to imagine what our life would be like without computers. I think computers will be more convenient and they are go

11、ing to change our life completely in the near future.Self Check1 Complete the passage with the correct forms of the words in the box. invent doubt mention website all of a suddenIt is often difficult to decide on the inventor of certain inventions. This is because sometimes a few people may _ things

12、 which are nearly the same. Its hard to tell who came up with the idea first. Some inventions can also lead to other inventionsinvent_. So some people _ whether the inventor came up with the idea himself or herself. They think that the inventor used someone elses idea to create his or her invention.

13、 That is why books or _ usually _ more than one inventor when giving information about inventions.all of a suddendoubt websites mention2 Rewrite these sentences using the passive voice. 1. Someone stole my watch. 2. They used five eggs to make this big cake. 3. When did they invent the personal comp

14、uter? 4. They asked us not to run in the hallway. 5. Someone took the video back to the store.1. Someone stole my watch.2. They used five eggs to make this big cake.My watch was stolen by someone.Five eggs were used to make this big cake by them.3. When did they invent the personal computer?4. They

15、asked us not to run in the hallway.5. Someone took the video back to the store.When was the personal computer invented?We were asked not to run in the hallway by them.The video was taken back to the store by someone.3 Find out information about an invention you would like to know more about and writ

16、e sentences below. Invention:When:Who:Purpose:switch plug (断路插头断路插头) 2012年，年， 富超穎富超穎 (中国中国)scooter carriage (滑板婴儿车滑板婴儿车) 2007年年 Valentin Vodev (奥地利奥地利) Exercise. Fill in the blanks with the correct form of the given verbs.1. The first paper _ (make) in China in 105 AD.2. In 610, papermaking _ (intro

17、duce) into Japan.was made was introduced 3. Kites _ (know) in China about 3,000 years ago.were known4. Wheelbarrows (独轮手推车独轮手推车) _ (invent) in the Han Dynasty.5. Gunpowder(火药火药) _ (discover) by the Chinese hundreds of years ago.6. Soccer _ (develop) in England in the 12th century.were invented was d

18、iscovered was developed . 按要求改写下列各句。按要求改写下列各句。 1. We planted these trees in 1997. (改成被动语态改成被动语态) _2. He made a cake yesterday. (改成被动语态改成被动语态) _3. The teacher gave the students some advice. (改成被动改成被动 语态语态) _These trees were planted (by us) in 1997.A cake was made by him yesterday.Some advice was given to the students by the teacher.4. He was seen to read a book in his room. (用用I作主语作主语, 改为主动语态改为主动语态) _5. She was helped by all the people.(改成一般疑问句改成