新人教高一英语必修2unit3现在完成时的被动语态.ppt

1、Unit 3 Computers,Grammar: The present perfect passive voice,Mother: John, have you washed your clothes?,John: Sorry, Mum, I havent. But I have already mopped the floor.,Which tense is it?,Present perfect tense,现在完成时 have/has done,-Someone has turned off the light. (有人刚把灯关了,对现在造成的结果是:现在很黑),-I have fi

2、nished my homework. I am free. (我已经完成了家庭作业,对现在造成的结果是很有空),Review,Can you rewrite these sentences by using present perfect passive voice(现在完成时的被动语态)?,Lead-in,What is present perfect passive voice?,.概念： 表示一个被动的动作或状态开始于过去,并对现在造成的影响,常与already,for,yet,since等时间状语连用,或用于How long.?句型中。 例：The door has been loc

3、ked. 【注意】 1. 过去分词前有两个助动词have/has和been。 2. 必须表示被动,概念先导（what）,2.What is its structure?,Task1: observe and find out the structure in affirmative sentence 肯定句.,1.Both my brother and I work at the power station that has been set up in my hometown. 2.Weve been told the sports meeting will be put off. 3.Al

4、l the preparations have been completed. 4. Jack has been injured since last Saturday. 5. We will start as soon as the work has been finished. 归纳:,1.Both my brother and I work at the power station that has been set up in my hometown. 2.Weve been told the sports meeting will be put off. 3.All the prep

5、arations have been completed. 4. Jack has been injured since last Saturday. 5. We will start as soon as the work has been finished.,主语 + has/have + been + V-ed(过去分词),1. The room has not been painted yet. 2.When and where to go has not been decided yet. 3.Betty has not been heard since 3 years ago. 4

6、. The problems havent been solved. 5. My computer has not been joined to the Internet. 归纳：,1. The room has not been painted yet. 2.When and where to go has not been decided yet. 3.Betty has not been heard since 3 years ago. 4. The problems havent been solved. 5. My computer has not been joined to th

7、e Internet. 归纳：,主语+ has/have +not+ been + V-ed(过去分词),Task 2: observe and find out the structure in negative sentence 否定句.,1. How long have you been employed at this job? 2. What has been decided to do this weekend? 3.Has all the homework been finished today? 4.Has anything been done to make the rive

8、r clean again? 5. Have the dirty clothes been washed by her? 归纳：,1. How long have you been employed at this job? 2. What has been decided to do this weekend? 3.Has all the homework been finished 4.Has anything been done to make the river clean again? 5. Have the dirty clothes been washed by her? 归纳：

9、,一般疑问句： Have/Has+主语+been +V-ed(过去分词) 特殊疑问句： 特殊疑问词 + has/have + 主语+ been + V-ed(过去分词),Task 3: observe and find out the structure in questions 疑问句（2种）.,1. 肯定句： 主语+ have/has been +过去分词 2. 否定句： 主语+ have/has +not+ been+过去分词 3. 一般疑问句： Have/Has +主语 + been+ 过去分词 .? 4. 特殊疑问句： 疑问词+ have/has + 主语+ been+过去分词 .?

10、,Summary,.概念：,注意: 1. 副词的位置。 often, usually, always, never, hardly, seldom等副词置于have/has和been中间。 2.常用完成时态的时间状语有：already, yet , recently, for /over +一段时间，so far, since, up to/till now等,Have a try !,The buildings, destroy, earthquake （肯定句）,The buildings have been destroyed in the earthquake.,Making up s

11、entences using present perfect passive Voice用现在完成时的被动语态造句:,【即学即练】,1.,machine,not，replace,by computer,The machine has not been replaced by computer.,2.,（否定句）,new bridge, build, in our city ？ （一般疑问句）,Has a new bridge been built in our city?,3.,What have been planted along the road?,What , plant, along

12、 the road ？ (特殊疑问句),4.,Complete the sentences below. 1.脏衣服都已经洗了。 The dirty clothes_. 2. 这项计划已经由专家研究过三次了。 _by the experts for three times. 3. 这些年来, 这个小孩一直由王奶奶照料。 _ by Grandma Wang all these years. 4. 工作一完成我们就立即动身。 Well start as soon as the work_.,have been washed,This plan has been studied,The kid ha

13、s been taken care of,has been finished,EXERCISE,Textbook：Page21, Exercise2,用被动语态改写下列句子。,They have finished the construction of the new railway lines by now. We have built a new library and a gymnasium in our school this year. 3. The car factory has produced a great many fine cars since the technolog

14、ical revolution. 4. They have made a plan to help the poor children in the poor area. 5. The government has spent a lot of money on the Hope Project.,They have finished the construction of the new railway lines by now.,The construction of the new railway lines has been finished by them by now.,2. We

15、 have built a new library and a gymnasium in our school this year.,A new library and a gymnasium have been built in our school this year by us.,3. The car factory has produced a great many fine cars since the technological revolution.,A great many fine cars have been produced by the car factory sinc

16、e the technological revolution.,4. They have made a plan to help the poor children in the poor area.,A plan has been made by them to help the poor children in the poor area.,5. The government has spent a lot of money on the Hope Project.,A lot of money has been spent on the Hope Project by the government.,Lead-in,Over time I have been changed quite a lot. L1 I have been used in offi