Unit3 Discovering Useful Structures（ppt课件）-2023新人教版（2019）《高中英语》必修第二册.pptx

1、U3.Structures 互联网极大地改变了Jan的生活。(强调完成)The internet has greatly changed Jans life。Jan的生活极大地被互联网改变了。(强调事实)Jans life is greatly improved by the Internet.Jan的生活极大地被互联网改变了。(强调已完成且对现在有影响)Jans life has been greatly improved by the Internet.Translate 人们写了很多关于互联网的文章。(强调完成)People have written many articles abou

2、t the Internet 很多互联网的文章被人们书写了。(强调事实)Many articles about the Internet are written by people 很多互联网的文章被人们书写了。(强调已完成且对现在有影响)Many articles about the Internet have been written.Translate 互联网极大地改变了Jan的生活。(强调完成)The internet has greatly changed Jans life。Jan的生活极大地被互联网改变了。(强调事实)Jans life is greatly improved b

3、y the Internet.Jan的生活极大地被互联网改变了。(强调已完成且对现在有影响)Jans life has been greatly improved by the Internet.Structure现在完成时被动态Present Perfect Passive Voice：Verb formActivePassive have/has+been+v-edHow do we form the present perfect passive voice?Fill in the blank.have/has+v-edForms of have been+V-edThe childre

4、n have already been told the good news.The children havent been told the good news yet.Have the children already been told the good news yet?Who has been told the good news.否定句疑问句对the children 提问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 yea

5、rs等。如：This class have been taught by Mr.Brown for two years.His Chinese has been improved a lot since he came to China.Rowlings novels have been translated into many foreign languages so far.现在完成时的被动语态有两种情况：现在完成时的被动语态有两种情况：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。如：The bike has

6、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。The story happened in 1990.*The story was happened in 1990.*The story has been happened in 1990.Change the sentences into the present perfect passive voice.(P.30)Theyve built a kind of n

7、ew PC with more functions.A kind of new PC has been built with more functions.1.I have downloaded the software to help my phone battery last longer.2.Someone has lost an identity card.3.Have you confirmed the Wi-Fi password?The software has been downloaded to help my phone battery last longer.An ide

8、ntity card has been lost.Has the Wi-Fi password been confirmed?4.Have you pressed the button yet to copy the file?5.Has anyone made a comment about the online database?Has the button been pressed yet to copy the file?Has a/any comment been made about the online database?the buildings,destroy,earthqu

9、ake The buildings have been destroyed by the earthquake.Look at the pictures,list some key words,then make up sentences using the present perfect passive voice.in our city,a new bridge,buildA new bridge has been built in our city.recently,many trees,plant,along the roadMany trees have been planted a

10、long the road recently.machinereplacecomputerThe machine has been replaced by the computer.seven Harry Porter books,J.K.Rowling,so far,writeSeven Harry Porter books have been written by J.K.Rowling so far.1.has;been updated2.have been visited3.has not been used 4.has been done5.have been inspired6.h

11、ave been posted7.have been caused8.has been deletedTask I on Page 741.have been given2.has been made3.has been supported 4.has been provided5.have been taught6.have been helped7.has been set upTask IV on Page 74 I.单句语法填空 1.Computers_(use)in offices and homes since 1970s.2.In my hometown,there is alw

12、ays a harvest supper for the farmer after all the wheat_(cut).8.Some efforts_(make)to improve the air quality in the city last winter.12.Great changes_(take)place in my home town and a lot of factories _(set)up in the past ten years.课时作业（十一）have been usedhas been cuthave been madehave takenhave been set