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1、,R 九年级上册,Section B（3a-3b）单元同步作文指导,Unit 6 When was it invented?,复习：一般过去时态的被动语态,单元语法,重点：一般过去时态的被动语态结构。 难点：被动语态中的一些特殊用法。,单元重难点,was/were +V-过分,.,Self Check 1,Complete the passage with the correct forms of the words in the box.,inventdoubtmentionwebsite all of a sudden,It is often difficult to decide on
2、the inventor of certain inventions. This is because sometimes a few people may _ things which are almost the,invent,.,same. Its hard to tell who came up with the idea first. Some inventions can also lead to other inventions _.So some people _ whether the inventor came up with the idea himself or her
3、self. They think that the inventor used someone elses idea to create his or her invention. That is why books or _ usually _ more than one inventor when giving information about inventions.,all of a sudden,doubt,websites,mention,inventdoubtmentionwebsite all of a sudden,.,This is because. 这是因为,考向,系动词
4、之后是表语，表语是由一个句子充 当的，即称为表语从句，连接表语从句的 词有：because，why，that，what，who， when，where，which，whether，how等。,讲解来自点拨,知识点,.,eg：All the cars are going slowly. This is because there is a thick fog. 所有的车都开得很慢，这是因为有浓雾。 His bike was broken. That is why he came to school on foot.他的自行车坏了。那就是他 步行来学校的原因。,讲解来自点拨,.,典例,You ha
5、ve spent too much time playing computer games. Thats_ your eyes hurt. (潍坊) Awhy Bhow Cwhat Dwhen,【点拨】句意：你花费了太多的时间玩电子游戏，那就是你眼睛疼的原因。Thats why.那是的原因。,A,讲解来自点拨,.,Self Check 2,Rewrite these sentences using the passive voice.,1Someone stole my watch. _ 2They used five eggs to make this big cake. _ 3When d
6、id they invent the personal computer? _,My watch was stolen by someone.,Five eggs were used to make this big cake by them.,When was the personal computer invented by them?,.,4They asked us not to run in the hallway. _ 5Someone took the video back to the store. _,We were asked not to run in the hallw
7、ay by them.,The video was taken back to the store by someone.,Lead-in,Inventions are everywhere in our life,Inventions are everywhere in our life,Inventions are everywhere in our life,3a,Think of something that you do not like to do. Then think of an invention that could help you. Make notes., Probl
8、em: _ 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,.,Imagine y
9、ou 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.,eg：This special pen was invented by Liu Jie. It has three colors and is used for taking notes and correcting
10、mistakes. It is very cheap. It is easy to take. It is made of plastic so its not heavy. Do you want to buy it?,.,写作： 典例导引,.,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; 2.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
11、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 inv
12、ented 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.,.,For example , it can send some messages to forei
13、gn 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
14、going to change our life completely in the near future.,.,点评：, Computers are becoming more and more important in our daily life. Do you know when the computer was invented ?,开门见山，点出主题。,语言过渡自然。通过一个疑问句，将写作方向转到介绍计算机的发展史上。,., for example, whats more I think computers will be more convenient and they are going to change our life completely in the near future.,等短语的使用使得更有说服力。,对未来计算机提出展望， 以此收尾显得自然流畅
