课件18张PPT。When was it invented?Unit 6第五课时：Section B (3a-Self Check) 同学们，上一课学习的单词你们都掌握了吗？现在大家来检验一下，点击下面的音频开始听写吧！Discuss about what you want to invent and why. Think of something that you do not like to do. Then think of an invention that could help you. Make notes.3aProblem：_____ New invention：_____ What it is used for：_____quickly taking notes in classa special pencorrecting mistakesImagine you are a business person. Write a description of your new invention. Try to sell the invention to the class. 3bThis 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 mistakes. It is very cheap. It is easy to take. It is made of plastic so it's not heavy. Do you want to buy it? Self Check 1Complete 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 which are almost theinvent same. It’s 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 herself. They think that the inventor used someone else’s 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 invent doubt mention website all of a sudden This is because... 这是因为…… 考向系动词之后是表语，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。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。典例You have spent too much time playing computer games. That’s_____ your eyes hurt. (潍坊) A．why B．how C．what D．when【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。That’s why...那是……的原因。 ASelf Check 2Rewrite 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 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? 4．They asked us not to run in the hallway. _____ 5．Someone took the video back to the store. _____We were asked not to run in the hallway by them. The video was taken back to the store by someone. Self Check 3Find out information about an invention you would like to know more about and write sentences below. Invention：_____ When：_____ Who：_____ Purpose：_____ Bell Telephone 1876 To communicate with others 一、完成 ... ...
