人教课标新教材必修1-3教案Unit 2 Wildlife protection-Discovering Useful Structure.doc

Unit 2 Wildlife ProtectionDiscovering Useful Structure【教材分析】The activity topic of this section is “report an ongoing event”, and the structure is the passive voice of present continuous tense. Rare wild animals are suffering from large-scale poaching, and species are on the brink of danger. Rescue operations are underway. “Being” and “suffering” are the meanings of the present progressive passive voice.The usage of present progressive passive voice is of great importance in writing a good discourse and appreciating some difficult language items, so it is vital to master it and use it flexibly in a context.【教学目标】1. Motivate students to deepen the understanding of the usage of present progressive passive voice in a fixed context.2. Enable students to master the usage of present progressive passive voice and use it flexibly in a context.3. Lead students to construct sentences or appreciate sentences used master it and use it flexibly in a context.【教学重难点】1. Help students to appreciate the function of the usage of present progressive passive voice in a sentence.2. Instruct students to write essays using the proper usage of present progressive passive voice.【教学过程】课前诊断Look at the picture and tell me what workers are doing. What is the house being done?The workers are building a house.A house is being built by the workers.Were being killed for the wool beneath our stomachs. And our fur is being used to make sweaters for people like you.We are being hunted for our ivories.Step 1: Read the sentences and sum up the meanings of the Present Continuous Passive Voice.1. Do you know any other endangered wildlife in China that is not being protected?2. Were being killed for the wool beneath our stomachs.3. Is their fur being used to make sweaters for people like you?4. What good things are being done here to save local wildlife?肯定式：be being doneShe is being treated in China now.否定式：be not being doneMy computer is being repaired now.我的电脑正在修理中。一般疑问式:Am/Is /Are+主语+ being + donee.g.: Are these books being sent to Beijing?Is the wall being painted?特殊疑问式：When How Where Why What （Am/Is /Are+主语+ being + done）Step II: When do we use the Present Progressive Passive Voice? 表示说话时正在进行的被动动作。(now, at the moment)Actions are being taken to realize Chinese dream.示现阶段正在进行的被动动作。 (说话时不一定在进行)The problem of food safety is being studied by scientists at present.表示一种习惯的被动行为(always, constantly )，带有赞扬、羡慕、讨厌等感情色彩。Children of our neighbors are always being praised by our parents.与某些情态动词连用表示对正在发生的动作进行推测。As a result of staying up late talking last night, Jimmy may be being scolded by his head teacher.Step 2. 难点.1.像take care of, look after, talk about, think of等动词与介词构成的短语用于现在进行时的被动语态时, 其中的介词不可省略。The ways to stop illegally hunting are being talked about. 阻止非法捕猎的方法正在研讨中。2. “be (am/is/are)+under/in+n.” 有时可相当于现在进行时的被动语态。Many questions are under discussion. =Many questions are being discussed. 许多问题正在被讨论。3. 有时表“状态,心理活动,情感”等的动词,常用在一般现在时的被动语态表示“正在进行”。The runaway of the traffic accident is wanted by the police. 警方正在通缉交通事故的逃逸者。The plan is being discussed at the meeting now. 现在这个计划正在讨论过程中。A new law is being made to prevent endangered animals from extinction. 为了阻止濒危动物的灭绝新的法律正在制定中。Workers are cutting down some trees in the park. Some trees are being cut down by workers in the park. (被动语态)Where are some trees being cut down by workers? (特殊疑问句)用现在进行时态的被动语态改动句子.现在进行时的被动语态的基本结构肯定结构be(am/is/are)being done否定结构be(am/is/are)+not+being done一般疑问结构be(am/is/are)+主语+being done特殊疑问结构特殊疑问词+be(am/is/are)+主语+being done课后巩固花式变换句式.They are building a modern school in his hometown.1. A modern school _ in his hometown. (改为被动语态)2. A modern school _ in his hometown. (把句改为否定句) 3._ in his hometown? (把句改为一般疑问句)4._ (对句就in his hometown进行提问)【答案】1. is being built 2.isnt being built 3.Is a modern school being built ? 4. What is a modern school being built?