Unit 3 Discovering useful structures （ppt课件） (2)-2022新人教版（2019）《高中英语》必修第二册.pptx

1、Unit 3The InternetDiscovering Useful Structures Look at the pictures and think about your lives Peoples lives have been greatly improved by the Internet.Peoples lives have been changed by online communities and the social networks.Read the pairs of sentences.Underline and compare the different verb

2、forms.Jans life has been greatly improved by the Internet.The Internet has greatly improved Janes life.Much has been written about the wonders of the World Wide Web.People have written much about the wonders of the World Wide Webhave/has donebe donehas/have been done have/has doneactive voicepassive

3、 voice has been improvedhas improved has been written have writtenFind more sentences containing the present perfect passive voice on Page 28.1.Much has been written about the wonders of the World Wide Web.2.Peoples lives have been changed by online communities and social network.3.Many people has b

4、een helped by the club.4.Jans life has been greatly improved by the Internet.has been written have been changedhas been helpedhas been greatly improvedWhy do we use the present perfect passive voice?Why do we use the present perfect passive voice?Peoples lives have been changed by online communities

5、 and the social networks.Much has been written about the wonders of the World Wide Web.Jans life has been greatly improved by the Internet.Many people has been helped by the club.Summary1:1)the receiver is an object2)there is not necessary to mention the doer or to emphasis the receiver.3)We want to

6、 focus on what has been done.Peoples livesMany peopleMuchJans lifeChange the sentences into the present perfect passive voice.EXAMPLE Theyve built a kind of new PC with more functions.-A kind of new PC has been built with more functions.Change the sentences into the present perfect passive voice.1.I

7、 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?4.Have you pressed the button yet to copy the file?5.Has anyone made a comment about the online database?Answers:1.The software has been downloaded to help m

8、y phone battery last longer.2.An identity card has been lost.3.Has the Wi-Fi password been confirmed?4.Has the button been pressed yet to copy the file?5.Has a/any comment been made about the online database?Read the poem.Then think of your own situation and write a similar poem.Look at the way your

9、 face has been washedLook at the way your teeth have been brushedLook at the way your shoes have been cleanedYoud better do them again.Look at the way the flowers have been plantedLook at the way the grass has been cutLook at the way the paths have been sweptI hope that youll come here again.Complet

10、e the sentences with the present perfect passive voice of thegiven verbs.1.Both learning sites _(visit)by over 10,000 people since last year.2.This keyboard _(not use)for a long time.3.Can you tell me what _(do)to bridge the digital divide?4.In the past year I _(inspire)to buy e-books instead of pap

11、er books.5.That app _(delete)from my smartphone already.6.It seems that more health problems _(cause)by mobile phones.have been visitedhas not been usedhas been donehave been inspiredhas been deletedhave been caused Use the present perfect passive voice in the context.Ladies and gentlemen,The world_

12、(turn)upside down since the invention of the Internet and the introduction of personal computers into nearly every home.The twin inventions of the personal computers and the Internet _(consider)to be among the two most important events of the last century.Shopping_(change)completely.Rather than goin

13、g out to stores weekly or even daily,more and more people order things from clothes to toys to foods online and have them delivered directly to their homes.Social communication_(take)over by the Internet.In the past,letters,phone calls,and face-to-face meetings were necessary to build up relationshi

14、ps,but now online communication is often the only social interaction that some people have all day!Games,music,movies and so on_(influence)heavily by the Internet.New kinds of crimes are happening on the Internet,too,so cyber security has to be constantly updated.We should not ignore this fact.Here,

15、I would like to appeal for the safety of using Internet,because the Internet is becoming the town square for the global village of tomorrow.Ladies and gentlemen,The world _(turn)upside down since the invention of the Internet and the introduction of personal computers into nearly every home.The twin

16、 inventions of the personal computers and the Internet _(consider)to be among the two most important events of the last century.Shopping _ _(change)completely.Rather than going out to stores weekly or even daily,more and more people order things from clothes to toys to foods online and have them del

17、ivered directly to their homes.Social communication _(take)over by the Internet.In the past,letters,phone calls,and face-to-face meetings were necessary to build up relationships,but now online communication is often the only social interaction that some people have all day!Games,music,movies and so

18、 on _(influence)heavily by the Internet.New kinds of crimes are happening on the Internet,too,so cyber security has to be constantly updated.We should not ignore this fact.Here,I would like to appeal for the safety of using Internet,because the Internet is becoming the town square for the global village of tomorrow.Summary2:The present perfect passive voice is often used in formal situations such as articles or speeches.Homework 下周我们学校将举办关于主题为下周我们学校将举办关于主题为“互互联网给我们学习带来的变化联网给我们学习带来的变化”的演讲，的演讲，你将代表我们班级参加演讲比赛。你将代表我们班级参加演讲比赛。Thank You!