Unit3 The world of science 现在完成时被动态 详解与练习（必修第三册）-2023-2024学年高中英语教材语法详解清单（外研版2019）

必修3 unit 3 现在完成时被动态 观察以下句子： 1 All preparations for the task have been completed so far. 2 Their living conditions have been improved because of 5G technology in the past five years. 3 Great discoveries have been made since space exploration since last year. 4 Three fourths of the housework has been done by the couple up to now. 5 Recently the news has been spread to every corner of the world. 总结规律： (1) 以上例句中的时态和语态是________________________ (2) 结构为：_________________________ (3) 以上句子中的时间状语分别为：______________;_____________;______________;____________;______________ 1、 现在完成时被动态： 1. 概念： 现在完成时概念：过去的动作或状态持续到现在，或对现在造成影响。主语是行为动作的发出者。 现在完成时被动态概念：过去的动作或状态持续到现在，或对现在造成影响。主语是行为动作的承受着。 2. 结构： 肯定式 have/has + been + v.-ed 否定式 have/has + not + been + v.-ed 一般疑问句 Have/Has + 主语+ been + v.-ed? 特殊疑问句 疑问词 + have/has + been + v.-ed? 举例说明： He has been recognized as a role model since he entered the middle school. 自从他进入初中以来一直是别人的榜样。 改为否定式：________________________________________________________ 改为一般疑问句：________________________________________________________ （对划线部分提问）He has been recognized as a role model since he entered the middle school. 特殊问句形式：___________________________________________________________ 二、现在完成时被动态的基本用法: (1)表示被动的动作从过去开始，对现在造成的影响或结果，通常与already,yet, just, never, recently 等副词连用。 He hasn’t been employed yet. 他还没有被雇佣。 The problem has already been settled by us. 问题已经被我们解决了。 Recently a heated discussion has been carried out. 近来，一场热议已经开展。 Such a better song has never been heard by me. 我从未听过这么好听的歌曲。 (2) 表示被动的动作从过去开始，对现在造成的影响或结果，通常与for 或since 引导的时间状语连用，或用于“How long..?” 中。 The ways to learn Peking Opera have been introduced to us since the old artist came to our school. 自从老艺术家来我们学校以来介绍给我们很多京剧的学习方法。 The financial problem in the poor country has been discussed online for the whole week. 这个穷苦国家的经济问题已经在线上讨论一整个星期了。 How long has the book been kept by you? 你借这本书多久了？ (3) 用在时间或条件状语从句中，用现在完成时代替一般现在时，强调动作的完成。 If the task has been finished, you will get a reward. 如果你完成这个任务，你会得