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Unit 9 When was it invented学案


Unit 9 When was it invented?
Section A 一、学习目标: 学习一般过去时的被动语态和特殊疑问句。 二、教学重难点: 一般过去时态的被动语态 基本结构:助动词 be(was / were)+及物动词的过去分词 A thief was caught last night. They were asked to speak at the m

eeting. 肯定式:It was made. 否定式:It was not made. 疑问式:Was it made? No, it wasn’t Yes, it was 三、教具:电子白板 录音机 四、学习过程: 1. 情境导入:warm-up Ask the students to be familiar with the words below according to the pictures on computer. Telephone, calculator, car, personal computer, TV, electric light, light bulb, alarm, clock, microwave oven, electric slipper. 2. 自主学习:presentation 1) 教学 When was the car invented? It was invented in?? Choose the three inventions of these and ask students to guess when each one was invented. For example, you might choose car, telephone, and personal computer. Have several different students guess and write the dates on the board. Ask the class to repeat the questions and answers. [T=Teacher, S=Student] T: When was the car invented ? (Class repeat.) T: Good. Now Jackie, what was your guess? S1: 1900 T: OK. Jackie, repeat after me. The car was invented in 1900. Repeat the process with several different inventions. At last, make students find out the real dates. 2) 教学 Who were the light bulbs invented by? And what are they used for ? 呈现 Edison and light bulbs 的画面。 Tell the students Edison invented light bulbs. Then ask the students to answer the questions below. T: Who were light bulbs invented by? ( Class repeat ) T: Good. Now Class repeat after me. They were invented by Edison. 3. 合作探究: 1)教学 操练 1a, 1c, 2c 学生看书本上 1a 的图画,根据图画,把 1a, 1c, 2c 中的语言点综合起来,叫学生 相互间回答问题。并用刚刚学到的目标句型来操练。最后,抽查几对学生,让他

们在全班面前,按要求进行对话。 2)教学 1b, 2a, 2b 首先, 帮助学生明确本题的要求。 接着, 听力练习, 学生根据录音内容完成 1b, 2a and 2b. 最后,重放一遍录音内容,学生跟读。 4、拓展创新: Consolidation and Extension. 完成一个任务 Ask some students to read about an invention using an encyclopedia or other book from the library, or by looking up information on the Internet. Have the students write up a short report and draw a simple picture of the invention or bring in a photo of it. Ask each students to show the picture and read his or her report to the class. 5. 梳理知识:本单元主要学习了一般过去时的被动语态,包括其结构与用法。 利用几项发明创造练习这一知识,最后用一篇小报告来完成写作练习。 6.达标测试: 汉泽英 1)计算机是何时发明的? 2)谁发明了计算机? 3)计算机是用来做什么? 4)你认为什么是最有用的发明? 5)它能够给人们更多时间工作和玩。 典型例题解析: 1.--What a nice classroom! --It ____ every day. A. is cleaning B. has cleaned C. must clean D. is cleaned 解析: 推测这句话的意思应该是 “它每天都被打扫” 考查被动语态的结构 be + 动 , 词的过去分词。因此答案应该选 D。 2.I know Beijing well. I ____ there three times. A .will go B. have been C. went D. have gone 解析:推测这句话的意思“我很了解北京,我去过那三次” 。表示去过应该采用 的时态是现在完成时, 因此可排除 A 和 C, 区别 have been 和 have gone,have been 去过;have gone 去了(还没回来) 。因此应该选择 B。 中考连接: 1.--Look at the sign on the right. --Oh, smoking ____ here. A .doesn’t allow B. isn’t allowed C. didn’t allow D. wasn’t allowed 2. --Will you come to the dinner party? --I won’t come unless Jim ______. A. can’t be invited B. was invited C. will be invited D.is invited 五、课后反思: 说一说这节课你学到了什么知识? 六、板书(略) 七、家庭作业: 1.识记所学知识 2.完成练习册上的相应练习题


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