UNIT 3 Section Ⅲ Discovering Useful Structures（课件PPT）-【优化指导】2023-2024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：人与社会一互联网) Section Ill Discovering Useful Structures >>UNIT 3 THE INTERNET 现在完成时的被动语态 1I11语法感知II [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. G返回导航) >UNIT 3 THE INTERNET [探究] 以上句子中的谓语是由have/has+been+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 谓语动词之间是被动关系。 G返回导航○ >UNIT 3 THE INTERNET 思考 1.什么是现在完成时的被动语态？ 首先是现在完成时，然后主语是动作的承受者。表示被动的动作 在说话之前已经完成，或强调过去的动作对现在造成的影响或结果。 2.现在完成时被动语态有其他句式吗？ 有。如：否定句have/has+not+been+done);一般疑问句have/has+ 主语+been+done);特殊疑问句（疑问词+have/has十主语+been+done)。 G返回导航○ >UNIT 3 THE INTERNET 1111语法精析11 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。 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. 你的任务一完成就可以回家。 G返回导航○ >>UNIT 3 THE INTERNET [探究] 句 意义 1 结果是现在不用做这项工作了，有副词 already 2 现在应派人去请医生，有副词 yet 3 可能还会 继续被修 4 从句中的现在完成时的被动语态代替 将来完成时 的被动语态 子返回等航① >>>UNIT3 THE INTERNET [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。 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。 子返回导航 >>UNIT3 THE INTERNET [即练] 单句填空 ①The classroom has been cleaned (clean).You needn't clean it now. 2Many suggestions from all over the world have been given (give)to me so far 3How long have you been employed (employ)at this job? Since 1999. 4It is said that this book has already been taken (take)by him for a long time. G返回导航○ >>>UNIT3 THE INTERNET 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。 3.Have the new booking systems for tickets been used? 新的订