Unit 3 Discovering Useful Structures现在完成被动语态（ppt课件） -2022新人教版（2019）《高中英语》必修第二册.pptx

1、现在完成时的主动语态：肯定句：肯定句：Shark has finished homework.否定句：否定句：Shark hasnt finished homework.疑问句疑问句(肯定肯定)：Has Shark finished homework?疑问句疑问句(否定否定)：Hasnt Shark finished homework?特殊疑问句：特殊疑问句：1.When has Shark finished his homework?/How has shark finished his homework?/Why has Shark finished his homework?/What

2、has Shark finished?现在完成时的被动语态：肯定句：肯定句：The homework has been finished by Shark.否定句否定句：The homework hasnt been finished by Shark.疑问句（肯定）疑问句（肯定）：Has the homework been finished by Shark?疑问句（否定）疑问句（否定）：Hasnt the homework been finished by Shark?特殊疑问句：特殊疑问句：1.When has the homework been finished by Shark?/H

3、ow has the homework been finished by Shark?/Why has the homework been finished by Shark?/What has been finished by Shark?现在完成时的被动语态一、现在完成时的被动语态的结构肯定式主语have/has been done 否定式主语have/has not been done 一般疑问式Have/Has主语been done？特殊疑问式疑问词have/has主语been done？疑问词：what,why,where,what,howThe first sentence of

4、ReadingThe first sentence of ReadingVSVSVSVSMuch_(write)about the wonders of the World Much_(write)about the wonders of the World Wide Web.Wide Web.Peoples lives_(change)by online communities Peoples lives_(change)by online communities and social networks.and social networks.Many people_(help)by the

5、 club.Many people_(help)by the club.Jans life_(improve)greatly by the Internet.Jans life_(improve)greatly by the Internet.has been writtenhas been writtenhas been improvedhas been improvedhave been helpedhave been helpedhave been changedhave been changedPassivePassive：have/has+(not)+been+v-edhave/ha

6、s+(not)+been+v-ed EXAMPLETheyTheyveve builtbuilt a kind of new PC with more a kind of new PC with more functionsfunctions.A kind of new PC A kind of new PC has been built has been built with more functions.with more functions.n n.功能；作用功能；作用vivi.起作用；运转起作用；运转1.I have downloaded the software to help my

7、 phone battery last longer.2.Someone has lost an identity card.3.Have you confirmed the Wi-Fi password?4.Have you pressed the button yet to copy the file?5.Has anyone made a comment about the online database?The software has been downloaded to help my phone battery last longer.An identity card has b

8、een lost.Has the Wi-Fi password been confirmed?vtvt.确认；使确信确认；使确信Has the button been pressed yet to copy the file?Has a/any comment been made about the online database?n n.文件文件,档案档案confirmedpressed the buttonfile1.-Where did you go last night?-I _(invite)to Toms birthday party.2.Both learning sites _

9、(visit)by over 10000 people since last year.3.The patient _(examine)now and will come out soon.4.Over the past 3 years,the paintings _(take)to more than 20 minutes in the world.5.My little pet _(die)when I was 7.6.When we arrived at the station,the train _(leave).7.Up to now he _(read)many story boo

10、ks.was invitedhave been visitedis being examinedhave been takendiedhad lefthas read Free computer training has been offered by the local government Free computer training has been offered by the local government for for two yearstwo years.Most of our courses have been taught online Most of our cours

11、es have been taught online sincesince COVID-19 COVID-19 pandemic broke out.pandemic broke out.Every teacher has been provided with a laptop Every teacher has been provided with a laptop so farso far.Can I use your computer as Can I use your computer as my keyboard has not been repaired my keyboard h

12、as not been repaired yet?yet?现在完成时被动语态的常用情况：常连用的常连用的时间状语时间状语：for+for+段时间，段时间，since+since+时间状语时间状语(从句从句)，these days,so far,up to now,in the last/past few years,yet,just,these days,so far,up to now,in the last/past few years,yet,just,ever,never,recentlyever,never,recently等。等。has been offeredhas been o

13、ffered two years two yearshave been taughthave been taught sincesince has been providedhas been providedso farso farhas not been repairedhas not been repaired yetyetforforI.I.有些动词没有被动语态有些动词没有被动语态,如如happen,take place,break out,happen,take place,break out,belong to,take part in,cost,lastbelong to,take

14、 part in,cost,last等不及物动词或词组。等不及物动词或词组。Great changes Great changes have been taken placehave been taken place in in networknetwork since since early 1960searly 1960s.Great changes Great changes have taken placehave taken place in in networknetwork since since early early 1960s1960s.My friend has boug

15、ht a personal computer for almost four years.My friend has bought a personal computer for almost four years.My friend has had a personal computer for almost four years.My friend has had a personal computer for almost four years.How long has this MacBook been bought?How long has this MacBook been bou

16、ght?How long ago was this MacBook bought?How long ago was this MacBook bought?II.II.一些特殊动词，如一些特殊动词，如borrowborrow，finishfinish，beginbegin，buybuy，start,start,return,marry,open,joinreturn,marry,open,join等构成的现在完成时被动语态不等构成的现在完成时被动语态不能与表示一段时间的状语连用。若要表达相应的意思，能与表示一段时间的状语连用。若要表达相应的意思，则需改换动词或时态。则需改换动词或时态。1.Pa

17、per money _(use)for over a thousand years.2._ the letter _(give)to Mr.Black?No.Its still on the desk.3.Great changes _(take)place in my hometown.has been usedHasbeen givenhave takenComplete the sentences.4.How long _(employ)at this job?Since 1999.5.When and where to go for the on-salary holiday _(not,decide)yet.6.I like these English songs and they _(teach)many times on the radio.7.All the preparations for the task _(complete),and were ready to start.have been taughthave been completed has not been decidedhave you been employed