Unit 3 The Internet Discovering useful structures （ppt课件）-2024新人教版（2019）《高中英语》必修第二册.pptx

1、Unit 3 The InternetGrammarLearning objectivesAt the end of the class,you will be able to1.know the form,the meaning and the function of the present perfectpassive voice2.talk about the things that have been doneMany students like this movie.This movie is liked by manystudents.Mike finished his homew

2、ork on time.His homework was finished on time.We will hold a meeting tomorrow.A meeting will be held tomorrow.Everyone is expecting the good news.The good news is being expected.RevisionRead the pairs of sentences and compare the verb formsPassive voiceActive voiceThis movie is liked by many student

3、s.His homework was finished on time.A meeting will be held tomorrow.The good news is being expected.Look at the sentences belowForms?Meanings?一般现在时被动语态am/is/are+done被做一般过去时被动语态was/were+done被做了一般将来时被动语态will+be+done将被做现在进行时被动语态am/is/are+being+done正在被做SummaryThe Internet has greatlyimproved Jans life.J

4、ans life has been greatlyimproved by the Internet.People have written muchabout the wonders of the World Wide Web.Much has been writtenabout the wonders of the World Wide Web.Read the pairs of sentences and compare the underlined verb forms.Passive voiceActive voiceHow do we form the present perfect

5、 passive voice?Fill in the blank below.have/has+donehave/has+been+doneVerb formPassiveActiveRead the sentences and underline the grammar structure1.Over time the city has been changed a lot.2.The computer has been used for 3 years.3.The dirty clothes have been cleaned.Understand the underlined parts

6、 and fill in the form below1.Over time the city have been changed a lot.2.The computer has been used for 3 years.3.The dirty clothes have been cleaned.have/has+been+done已经被做了Understand the underlined parts and fill in the form below1.How many buildings have been built in your school?2.Have the lost

7、keys been found?3.The date has not been decided yet.肯定式have/has+been+done否定式have/has+not+been+done一般疑问句式have/has+主语+been+done特殊疑问句式特殊疑问词+主语+have/has+been+doneThe usage of the present perfect passive voice1.for+since+()so far,up to now1)This class has been taught by Mr.Li for two years.2)His Chinese

8、has been improved a lot since he came to China.2.already,yet,ever,never 1)The bike has not been repaired yet.2)I have already been introduced to Mr.Li.Change the sentences into the present perfect passive voice Theyve built a kind of new PC.A kind of new PC has been built.1.I have downloaded the sof

9、tware to help my phone battery last longer.2.Someone has lost an identity card.3.Have you pressed the button yet to copy the file?1.I have downloaded the software to help my phone battery last longer.The software has been downloaded to help my phone battery last longer.2.Someone has lost an identity

10、 card.An identity card has been lost.3.Have you pressed the button yet to copy the file?Has the button been pressed yet to copy the file?Think and Answer What are the similarities and differences between the present perfecttense and the present perfect passive voice?两者都表示动作已经完成，并对现在造成影响或动作从过去开始持续到现在

11、。现在完成时，意为“已经做了”，主语是谓语动作的发出者现在完成时的被动语态，意为“已经被做了”主语是谓语动作的承受者2 When can we use the present perfect passive voice当动作的执行者没必要说明，不重要或者不清楚是谁时，多用被动语态。Practice 1.I am sorry,but the letters have not been typed out yet.很抱歉，这些信还没有被打印出来。2.The plan has been discussed for two hours.这项计划已被讨论了近两个小时了。3.She has not bee

12、n mentioned since then.从那时起，她就没被提起过。4.Has the date for the meeting been decided?会议日期决定了吗？The students have been told the great news.1.将原句变为否定句The students have not been told the great news.2.将原句变为 一般疑问句Have the students been told the great news?3.对原句中的the students进行提问Who have been told the great new

13、s?WuhanattackNovel coronavirusWuhan has been attacked by novelcoronavirus for more than onemonth.Two new hospitals,buildTwo new hospitals have been builtfor the patients.many doctors and nursessendWuhanMany doctors and nurses fromother cities have been sent to helpWuhan.more and more infected people

14、cureMore and more infected peoplehave been cured.Free TalkUse the present perfect passive voice to talk about what youhave done or havent done this week.For example:The house has been given a good cleaning.My daughters birthday cakehas been ordered,but the decoration for the birthday party has not b

15、een finished It is your turnUse the present perfect passive voice to talk about what you havedone or havent done this week.Tell as many things as you can.Summary意义为：“已经被做了.”肯定式：have/has+been+done否定式：have/has+not+been+done一般疑问句式：have/has+主语+been+done特殊疑问句式：特殊疑问词+have/has+been+doneHomeworkFinish the 3 tasks on your worksheet.