Unit 3 The Internet Discovering Useful Structures 现在完成时被动语态课件-2023-2024学年高中英语人教版（2019）必修第二册

Unit 3 Discovering Useful Structure Present Perfect Passive Voice What is present perfect tense? present(now) future past 现在完成时 have/has done（过去分词） 表示说话时已经完成的动作，而且这个动作的结果对现在仍有影响; 表示动作发生在过去，但一直持续到现在，并且有可能继续持续下去。 I have lived in China for 5 years. 我在中国住了5年。（从5年前到现在，现在还在中国） I lived in China for 5 years. 我在中国住了5年。（过去住在中国，现在不在中国） 过去的动作一直持续到现在 过去的动作对现在产生影响 Someone has broken the window. (窗户现在是坏的) I have already lost the key. (我现在没有钥匙) I haven't read the book yet. (不了解书的内容) 1) 表过去开始的被动动作一直持续到现在，常连用的时间状语有：for+段时间，since+时间状语(从句)，these days, so far, up to now, in the last/ past few years等。 eg This class have been taught by Mr. Brown for two years. His Chinese has been improved a lot since he came to China. Rowling’s novels have been translated into many foreign languages so far. 2) 表某被动动作对现在造成的影响或结果，常与already, yet, just, ever, never, recently等连用。 eg The bike has not been repaired yet. I have already been introduced to Mr. Smith. 注意：有些动词没有被动语态, 如不及物动词happen, take place, break out等。 肯定式： S+have/has+V-过去分词(done) 否定式： S+have/has+not+V-过去分词... 一般问句： Have/Has+S+V-过去分词... 特殊疑问句： 疑问词+have/has+S+V-过去分词... 现在完成时的基本结构 the buildings, destroy, earthquake The buildings have been destroyed by the earthquake. Look at the pictures, first list some key words, then make up sentences using the present perfect passive voice. machine replace computer The machine has been replaced by the computer. in our city, a new bridge, build A new bridge has been built in our city. recently, many trees, plant, along the road Many trees have been planted along the road recently. seven Harry Porter books, J. K. Rowling, so far, write Seven Harry Porter books have been written by J. K. Rowling so far. You have slain an enemy. Your team has destroyed the turret. slay – slew - slain have/ has done have/ has been done An ally has been slain. An enemy has been slain. You have been slain. Your turret has been destroyed. 现在完成时 现在完成时的被动语态 防御塔 杀死 敌人 盟友 slay-slain-