人教版九年级上册 初三 英语Unit6SectionB3a-3b课件

1、Unit 6When was it invented? Section B 3a-3b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 .The teacher was visited by them two years ago. 他们两年前看过这位老师。主动变被动解题步骤:1. 找宾语 即动作的承受者2. 判断宾语的单复数 即be动词的单复数3. 判断动词的时态 即be动词的时态4. 修改谓语的时态 即原句动词改为过去分词5. 修改原句的主语 即by + 主语/ 宾语be要随着主语变 逻辑主语by来

2、引1. Tom broke the window. The window was broken by Tom.2. He broke the windows. The windows were broken by him. Warming up Inventions are everywhere in our life3a Think of something that you do not like to do. Then think of an invention that could help you. Make notes. Problem: _ New invention: _ Wh

3、at it is used for: _quickly taking notes in classa special pen3b Imagine you are a business person. Write a description of your new invention. Try to sell the invention to the class.This special pen was invented by Liu Jie. It has three colors and is used forThis special pen was invented by Liu Jie.

4、 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 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 microchips Sample writingmemory, then assign a s

5、hort 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

6、in your hot drink, the color changes.Color changing cupSmart and creative inventionsYou can never chop your fingers off anymore. Smart and creative inventionsIts then safe for young children to eat them. switch plug (断路插头) 2012年， 富超穎 (中国)scooter carriage (滑板婴儿车) 2007年， Valentin Vodev (奥地利) 计算机在我们的生活

7、、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。 Computer_ 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 .Co

8、mputer 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,

9、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. 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.

10、 It makes us relax. Its hard to imagine what our life would be likewithout computers. I think computers will be more convenient and they are going to change our life completely in the near future.Writing 现在的科技日新月异，各种高科技产品成为我们生活中不可缺少的物品，如笔记本电脑（laptop）、手机（mobile phone）、MP4、数码相机（digital camera）、数码摄像机（D

11、V）等。请以“My Favorite Invention”为题描述一种你最喜欢的发明，并说明理由（至少两条）。80词左右。Self check1.Complete the passage with the correct form 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 _

12、things which are nearly the same. Its hard to tell who came up with the idea first. inventSome inventions can also lead to other inventions _. 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 inv

13、ention. That is why books or _ usually _ more than one inventor when giving information about inventions.doubt websites mentionall of a sudden2. 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

14、 computer?4. They asked us not to run in the hallway.5. Someone took the video back to the store.Check answers1. Someone stole my watch.2. They used five eggs to make this big cake.3. When did they invent the personal computer?4. They asked us not to run in the hallway.5. Someone took the video back

15、 to the store.My watch was stolen (by someone).Five eggs were used to make this big cake.When was the personal computer invented?We were asked not to run in the hallway.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

16、 write sentences below. Invention:When:Who:Purpose:Exercise . Fill in the blanks with the correct form of the given verbs.The first paper _ (make) in China in 105 AD.For over 500 years the art of making paper _ (limit) to China.In 610, papermaking _ (introduce) into Japan.Kites _ (know) in China abo

17、ut 3,000 years ago.was made was limited was introduced were known5. Wheelbarrows _ (invent) in the Han Dynasty.6. Gunpowder _ (discover) by the Chinese hundreds of years ago.7. Soccer _ (develop) in England in the 12th century.were invented was discovered was developed II. 按要求改写下列各句。 1. We planted t

18、hese trees in 1997. (改成被动语态)_2. He made a cake yesterday. (改成被动语态)_These trees were planted (by us) in 1997.A cake was made by him yesterday.3. The teacher gave the students some advice. (改成被动语态)_4. He was seen to read a book in his room. (用I作主语, 改为主动语态)_5. She was helped by all the people.(改成一般疑问句)

19、_Some advice was given to the students by the teacher.I saw him read a book in his room.Was she helped by all the people?. 完成句子。1. 在200多个国家中，超过一亿人打(篮球)，包括中国。_ _ _ by _ _ 100 million people in over 200 countries including China. 2. 篮球是由加拿大一位叫詹姆斯奈史密斯的博士发明的。Basketball _ _ _ a Canadian doctor named Jame

20、s Naismith. Itisplayedmorethanwasinventedby3. 人们认为，历史上的首次篮球赛是在1891年12月21日 举行的。_ _ _ that on December 21st, 1891, the first basketball game in history was played. 4.从那时起，篮球在世界各地的普及程度得到提升。Since then, the popularity of basketball _ _ worldwide. Itisbelievedhasrisen.用所给词的适当形式填空。1. Now computers are widely used in our _ (day) lives.2. He mentioned _ (hear) from her often.3.The soup is very _ (salt) because my mother put lots of _ (salt) on it.4. Since then, the _ ( popular ) of basketball has risen quickly.5. I have worked here for _(near) two years.