Unit 2 Wildlife protection Discovering useful structures 被动语态课件-2023-2024学年高中英语人教版（2019）必修第二册

Unit 2 Wildlife Protection Discovering Useful Structures --- The Present Continuous Passive Voice The passive voice 被动语态 二、意义：被动语态表示主语是动作的承受者。 一、结构：be + done Lead-in:Review The tree was planted by us. 2 二、意义：表示说话时或现阶段某个动作正在进行。 一、结构：主语+ be(am/is/was/are/were) +doing The present continuous tense现在进行时 We are having an English class. 3 Presentation 一. Observe the example sentences and summarize the structures of the present continuous passive voice. 1.A lot of antelopes are being hunted illegally. 2.Animals habitats are not being destroyed as humans search for more resources. 3.Is more land also being used for growing crops? 4.How many species are being driven to extinction? 4 1.如句(1):现在进行时的被动语态肯定形式为:主语+ ________________________。 2．如句(2):现在进行时的被动语态否定形式为:主语+ _____________________。 3．如句(3):现在进行时的被动语态的一般疑问句式为：______________________________。 4．如句(4):现在进行时的被动语态的特殊疑问句式为：________________________________________。 is/am/are being done is/am/are not being done is/am/are＋主语＋being done 疑问词＋is/am/are+主语＋being done 5 (3) What measures are being taken to help them? (2) What is being done to help them? (1) African elephants are being hunted. 二、Underline the present continuous passive voice in the sentences and discuss the meaning of the sentences.（Page18） 非洲大象正在被猎杀。 现在可以做些什么来帮助它们呢? 现在可以采取哪些措施来帮助它们呢? 2.现在进行时的被动语态的意义 1. 定义 主语是动作的承受者, 表示说话时或现阶段某个被动 的动作正在进行。 2.现在进行时的被动语态的意义 ①表示说话时正在进行的被动动作,句中常用now, right now, at this moment, at present等时间状语。 My computer is being fixed now. 8 ②表示现阶段正在进行的被动动作.(说话时不一定在进行) A new library is being built in our school. It will open next year. 9 1. 定义 主语是动作的承受者, 表示说话时或现阶段某个被动 的动作正在进行。 Summary：the present continuous passive voice ① 表示说话时正在进行的被动动作，句中常有now, right now, at the moment, at present 等时间状语。 ② 表示现阶段正被进行的动作，但此动作在此时此刻不一定正在发生。 形式 结构 肯定式 主语＋am/is/are＋being done. 否定式 主语＋am/is/are not＋being done. 一般疑问式 am/is/are＋主语＋being done？ 特殊疑问式 疑问词＋am/is/are＋主语+being done？ Summary 11 am/is/are being done am/is/are doing am