【课件】Unit+3Discovering+useful+structures+课件人教版（2019）必修第二册.pptx

Unit 3 The InternetGrammar高中英语高中英语Learning 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 homework 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.高中英语高中英语RevisionRead the pairs of sentences and compare the verb formsPassive voiceActive voiceThis movie is liked by many students.His homework was finished on time.A meeting will be held tomorrow.The good news is being expected.高中英语高中英语Look at the sentences belowForms?Meanings?种类种类构成构成意义意义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正在被做高中英语高中英语SummaryThe Internet has greatlyimproved Jans life.Jans 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.高中英语高中英语Read the pairs of sentences and compare the underlined verb forms.Passive voiceActive voice高中英语高中英语How do we form the present perfect passive voice?Fill in the blank below.have/has+donehave/has+been+doneVerb formPassiveActive高中英语高中英语Read 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.高中英语高中英语Understand the underlined parts 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.现在完成时的被动语态现在完成时的被动语态形式形式have/has+been+don意义意义e已经被做了高中英语高中英语Understand the underlined parts and fill in the form below1.How many buildings have been built in your school?2.Have the lost keys been found?3.The date has not been decided yet.现在完成时的被动语态现在完成时的被动语态肯定式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+done高中英语高中英语The usage of the present perfect passive voice1.表过去开始的动作表过去开始的动作 一一 直持续到现在，直持续到现在，常连用的时间状语有：常连用的时间状语有：for+时间时间段，段，since+时间状语时间状语(从句从句)，so far,up to now等。等。如：如：1)This class has been taught by Mr.Li for two years.2)His Chinese has been improved a lot since he came to China.2.表示某动作已经完成，表示某动作已经完成，并对现在造成影响，并对现在造成影响，常与常与already,yet,ever,never等连用等连用。如：如：1)The bike has not been repaired yet.2)I have already been introduced to Mr.Li.高中英语高中英语高中英语高中英语Change the sentences into the present perfect passive voice Example:Example:Theyve built a kind of new PC.A kind of new PC has been built.1.I have downloaded the software 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?高中英语高中英语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 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?高中英语高中英语Think and Answer1 1、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。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。高中英语高中英语Practice一一、补全句子补全句子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 been 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？高中英语高中英语二二、按要求改写句子按要求改写句子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 news?WuhanattackNovel coronavirusWuhan has been attacked by novelcoronavirus for more than onemonth.高中英语高中英语三三、根据所给图片及提示词，根据所给图片及提示词，用现在完成时的被动语态写用现在完成时的被动语态写句子句子Two new hospitals,buildTwo new hospitals have been builtfor the patients.高中英语高中英语many doctors and nursessendWuhanMany doctors and nurses fromother cities have been sent to helpWuhan.高中英语高中英语more and more infected peoplecureMore and more infected peoplehave been cured.高中英语高中英语高中英语高中英语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 been finished 高中英语高中英语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.高中英语高中英语Summary现在完成时的被动语态现在完成时的被动语态意义为：“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+done高中英语高中英语HomeworkFinish the 3 tasks on your worksheet.