UNIT 3 Section Ⅲ Discovering Useful Structures（课件PPT）-【优化指导】2024-2025学年新教材高中英语必修第二册（人教版2019）

UNIT 3　THE INTERNET (单元主题语境：人与社会——互联网) Section Ⅲ　Discovering Useful Structures 栏 目 索 引 语法感知 语法精析 语境综合练 现在完成时的被动语态 [观察] 1．Much has been written about the wonders of the World Wide Web. 2．People's lives have been changed by online communities and social networks. 3．Many people have been helped by the club. 4．Jan's life has been greatly improved by the Internet. 语法感知 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [探究] 以上句子中的谓语是由“________＋____＋done”构成的现在完成时的被动语态的肯定形式。表示动作已经完成，强调对现在造成的影响或结果，而且主语和谓语动词之间是_____关系。 have/has been 被动 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 1．什么是现在完成时的被动语态？ _____________________________________________________________ _____________________________________________________________ 2．现在完成时的被动语态有其他句式吗？ _______________________________________________________________________________________________________________________________________________________ 表示被动的动作在说话之前已经完成，或强调过去的被动动作对现在造成的影响或结果。 有。如：否定句式(have/has＋not＋been＋done)；一般疑问句式(have/has＋主语＋been＋done)；特殊疑问句式(特殊疑问词＋have/has＋主语＋been＋done)。 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 一、现在完成时的被动语态的意义 [感知] 1．The work has already been finished. 这项工作已经完成了。 2．The doctor hasn't been sent for yet. 还没有派人去请医生。 语法精析 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 3．The machine has been repaired for two hours. 这台机器已经被修理两个小时了。 4．You can go home as soon as your task has been finished. 你的任务一完成你就可以回家了。 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [探究] 句 意义 1 结果是现在不用做这项工作了，有副词_______ 2 现在应派人去请医生，有副词___ 3 机器可能还会_________ 4 从句中的现在完成时的被动语态代替__________的被动语态 yet 继续被修 将来完成时 already UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [归纳] 现在完成时的被动语态的意义： 1．表示被动的动作在说话之前已经完成，强调过去的动作对现在造成的影响或结果。通常与already、yet、never、recently等副词及时间状语so far、by now、up till now、before等连用。 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 2．表示一个被动的动作或状态开始于过去，持续到现在，并有可能持续下去。常与for或since引导的时间状语连用，或用于“How long ...？”句型中。 3．用在时间或条件等状语从句中，表示将来某时已完成的动作，即用现在完成时的被动语态代替将来完成时的被动语态。 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [即练] 单句填空 1．The classroom ________________(clean).You needn't clean it now. 2．Many suggestions from all over the world _______________(give) to me so far. 3．Caves in Guilin ___________________ (develop) since the Tang and Song dynasties. 4．It is said that this book ______________(take) by him already for a long time. has been cleaned have been given have been developed has been taken UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 二、现在完成时的被动语态的构成 [感知] 1．The operation has been performed many times in this hospital. 这个手术在这家医院已经做了很多次了。 2．His homework hasn't been finished. 他的家庭作业还没有写完。 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 3．Have the new booking systems for tickets been used? 新的订票系统已经在使用中了吗？ 4．Why has he been praised by his teacher? 为什么他被老师表扬了？ UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [探究] 上述例句中分别为现在完成时的被动语态的_____式(1)、_____式(2)和____式(3和4)。 肯定 否定 疑问 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [归纳] 现在完成时的被动语态的构成： UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [即练] 单句填空 1．How long ___ the battery ____________(charge)? 2．Has the date for the next meeting ____________(decide)? 3．I __________________(employ) by the company since the 1970s. 4．It's said that the cinema _______________(close) for repairs for months. has been charged been decided have been employed has been closed UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 三、其他注意事项 [感知] [组1] 1．The park was opened to the public last year. 这个公园去年向公众开放。 2．The park has been opened to the public. 这个公园已经向公众开放。 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [组2] The company has given him a chance to work abroad recently. ＝He has been given a chance to work abroad recently by the company. ＝A chance to work abroad has been given to him recently by the company. 近期这家公司已经给了他一个出国工作的机会。 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [探究] 过去 影响 主语 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [归纳] 1．与一般过去时的被动语态的区别 一般过去时的被动语态所表示的动作或状态与现在的情况没有联系，而现在完成时的被动语态则强调与现在的情况有联系。 2．后接双宾语的动词，如give、send、bring、take、teach、show、tell、sing、write、read、sell、buy、pay、lend、pass、promise等，变为被动语态时，一般将间接宾语变为被动语态的主语；若将直接宾语变为被动语态的主语，间接宾语前面要用相应的介词。 UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 [即练] 用被动语态改写下列句子 1．My mother has given me a new shirt. →___________________________________________ →______________________________________________ I have been given a new shirt by my mother. A new shirt has been given to me by my mother. UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 2．We have already told the good news to the children. →________________________________________________________ →__________________________________________________________ 3．He hasn't removed the ink from his clothes. →____________________________________________________ 4．This company has produced new types of computers. →__________________________________________________________ 5．Who has Mary invited to her birthday? →________________________________________ The children have already been told the good news by us. The good news has already been told to the children by us. The ink hasn't been removed from his clothes by him. New types of computers have been produced by this company. Who has been invited to Mary's birthday? UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 根据汉语提示补全短文 In our community，there is a large activity room.For the past few years，our community 1._______________________________(已经举行了10多场会议) there.Since 2018，five computers 2._______________(已经被安装) there for the residents.Today，the residents' lives 3._________________________(已经被极大地改变了) by these computers，because some residents 4.________________(已经被教) to use the Internet.Although they 5.________________________________(还没有完全掌握怎样使用互联网)，their confidence 6._________________(已经被激发) by it.Who can guess what their future lives would be like? 语境综合练 has held more than ten meetings have been fixed have been greatly changed have been taught haven't mastered that completely has been inspired UNIT 2　WILDLIFE PROTECTION 英语　必修　第二册　R 返回导航 谢 谢 形式 构成 肯定式 主语＋have/has been done ... 否定式 主语＋have/has not been done ... 一般疑问式 Have/Has＋主语＋been done ...？ 特殊疑问式 特殊疑问词＋have/has＋主语＋been done ...？ 组1 与一般过去时的被动语态的区别 1 说明动作发生于____ 2 说明动作发生于过去，但对现在有____，即现在公园已经开放了 组2 后接双宾语的动词的被动语态 任何一个宾语都可以作____ $$