外研版（2019）高中英语必修第三册 Unit3 单元语法复习课件.pptxVIP

复 习 课 3高一年级 英语Unit3-6 语法知识 Unit 3现在完成时的被动语态Unit 4现在进行时的被动语态Unit 5过去将来时Unit 6省略现在完成时的被动语态语境体验 There have been golden ages of invention throughout history. But now we find ourselves in the great new age of technology because most of the new great inventions are tech-based. As we can see, important advances have been made in medicine and environmental science thanks to increasing computer power. For example, new inventions like 3D printers have been used to make replacement hearts and bone parts.一、现在完成时的被动语态的结构基本结构：has/have+been done二、现在完成时的被动语态的用法 1、表示一个被动的动作在说话之前已完成，强调过去的动作对现在造成的影响和结果，常与already, yet, just ,never, recently,ever since, so far, up to now, in/over/during the last/past few years等时间状语连用。 2、表示一个被动的动作或状态从过去开始一直延续到现在，常与for或since引导的时间状语连用。 3、用在时间或条件状语从句中，表示将来已完成的被动动作，即用现在完成时的被动语态代替将来完成时的被动语态。 You shouldnt watch TV before your homework has been finished.现在进行时的被动语态语境体验 Hello , everyone! This broadcast is being brought to you from the largest museum on Earth--the Louvre. At the moment, I am being pushed around a bit in the most crowded area of the Louvre. I am sure you are going to love this masterpiece of Leonardo da Vinci. Yes, its Monalisa, which really attracts so many visitors every day. About 35,000 works are currently being displayed in the Louvre. I really hope you can visit this fantastic place one day to feel the power of these great works of art. 一、现在进行时的被动语态的结构基本结构：am/is/are+being done二、现在进行时的被动语态的用法1. 表示说话时或现阶段正在进行或发生的被动动作，强调主语是动作的承受者。2. 表示一种经常性的被动行为，和always, constantly等表示频率的副词连用, 常常带有赞扬或厌恶的感情色彩。例如：He is always being praised by the teacher.3.“be+ in/on/under+名词”常含有被动含义，可代替现在进行时的被动语态。如：The highway is under repair.过 去 将 来 时语境体验 Last year, hundreds of people spent good money on an experience that would include crowds, discomfort and danger. Many would become sick,due to the extreme cold and low air pressure, and a few would even lose their lives. But why did so many people make this choice? Arnette, who climbed Qomolangma in 2011 and was going to c