1、Unit 6 When was it invented?Section B，1a-1e & Self Check一、Teaching Aims:1.to learn and to use new wordscrispy sour by mistake customer 2.to be able to use “the passive voice of past tense“二、Teaching key points: (1) sentences: “the passive voice of past tense“Eg. It was invented by a great man.(2) ne
2、w words and phrases: crispy sour by mistake customer 三、Teaching difficult points:sentences: “the passive voice of past tense“Eg. It was invented by a great man.四、Teaching Aids:1. a tape recorder2. the blackboard3. a computer with PowerPoint 五、the first period (for one class)六、Teaching stepsStep1: Re
3、view八大时态被动语态八大时态一般现在时：主语+动词原形/ 单三主语+动词的单三形式一般过去时：主语+动词的过去式现在进行时：主语+am/is/are/+v-ing过去进行时：主语+was/were+v-ing一般将来时：主语+will/shall+动词的原形主语+be going to+动词的原形过去将来时：主语+would+动词的原形主语+was/were going to+动词的原形现在完成时：主语+have/has+动词的过去分词过去完成时：主语+had+动词的过去分词八大时态对应的八大被动语态一般现在时的被动语态：主语+am/is/are/+动词过去分词+by sb.(sb为宾格)
4、一般过去时的被动语态：主语+was/were+动词过去分词+by sb.现在进行时的被动语态：主语+am/is/are/+being+动词过去分词+by sb过去进行时的被动语态：主语+was/were+being+动词过去分词+by sb.一般将来时的被动语态：主语+will/shall+be+动词过去分词+by sb.过去将来时的被动语态：主语+would+be+动词过去分词+by sb.现在完成时的被动语态：主语+have/has+been+动词过去分词+by sb.过去完成时的被动语态：主语+had+been+动词的过去分词+by sb.Step2: Learn the new wor
5、ds and expressions1. crispy adj. 脆的；酥脆的 2. sour adj. 酸的；有酸味的 3. by mistake 错误地；无意中4. customer n. 顾客；客户Step3: The words in the box describe how food can taste.Write them under the correct pictures. Some pictures have more than one word. On PPT7Step4: Write the name of a different food after each word
6、.sweet_banana_ crispy_salty_ sour_Step 5: Listen and circle T for true or F for false.1. Potato chips were invented by mistake. T F2. They were invented in 1863. T F3. The customer thought the potatoes were not thin enough. T F4. The customer said they were not salty enough. T F5. George wanted to m
7、ake the customer happy. T F6. The customer was happy in the end. T FStep 6: Listen again. Complete the sentences.The History of Potato ChipsDid you know that potato chips were invented by mistake? Potato chips_ by a cook called George Crum. They were invented in_. George Crum cut the potatoes really
8、, really_ and then cooked them for a long time until they were_. And he put lots of salt on them so they were_.Step7: Make a conversation about the invention of potato chips. Use the information in 1c and 1d.A: Did you know potato chips were invented by mistake?B: Wow, I didnt know that. Who invente
9、d them?A: .Step8: Self Check1. Complete the passage with the correct forms of the words in the box.On PPT12-14Step 9:Summary(1) sentences: “the passive voice of past tense“Eg. It was invented by a great man.(2) new words and phrases: crispy sour by mistake customer Step 11: Homework1. Remember the new words, and we are going to have a dictation tomorrow2. Preview section B, 2b七、 Board DesignUnit 6 When was it invented?Section B，1a-1e & Self Check1. sentences: “the passive voice of past tense“Eg. It was invented by a great man.2. new words and phrases: crispy sour by mistake customer
