Unit 2 Wildlife Protection Discovering Useful Structures 课件-2023-2024学年高中英语人教版（2019）必修第二册

人教版(2019)必修第二册英语高中 Unit2 Wildlife Protection Discovering useful structures 4 3 2 1 Lead in Review Summary Exercises Discovering Useful Structures 5 Language points The structure of present continuous passive voice Simple（一般） Continuous（进行） Present （现在） do/does Tense is/am/are doing Perfect（完成） Perfect continuous（完成） Past （过去） Future （过去） The past future （过去将来） have/has done have/has been doing did was/were doing had done Had been doing will/shall do will/shall be doing will/shall have done will/shall have been doing should/would do should/would be doing should/would have done should/would have been doing Lead in 4 Change the sentences into the passive form. Active voice (主动语态)  Passive form (被动语态)  (1) I take a book. (1) The book is taken by me. (2) He waters the flowers every day. (2) The flowers are watered by him every day. (3) The famers don't grow apples on the farm. (3) Apples are not grown by the farmers on the farm. (4) Can we put our bikes here? (4) Can our bike be put here? Review The important thing in life is to have a great aim, and the determination to attain it 5 肯定句 主语＋be(am/is/are) ＋being done 否定句 主语＋be(am/is/are) ＋not＋ being done 一般疑问句 be(am/is/are) ＋主语＋being done 特殊疑问句 特殊疑问词＋be(am/is/are) ＋主语＋being done The important thing in life is to have a great aim, and the determination to attain it 7 Where is a modern school being built is being built isn't being built Is a modern school being built The important thing in life is to have a great aim, and the determination to attain it The farmer is harvesting the crops at the moment. The crops are being harvested by the farmer at the moment. 现在进行时的被动语态的用法 1．表示此刻正被进行的动作，句中常用now，at the moment等时间状语。 The black-headed gulls are being fed by people. The important thing in life is to have a great aim, and the determination to attain it 注意要点 ①不可遗漏being 现在进行时的被动语态中，be为第一助动词，being为第二助动词，缺一不可，且位置不可互换。此结构若缺少being，则就成为一般现在时的被动语态或系表结构。比较： Look！The children are being taken care of by their aunt.