Unit 3 The Internet-Period 4 Discovering Useful Structures （ppt课件）-2022新人教版（2019）《高中英语》必修第二册.pptx

1、Discovering Useful Structuresn By the end of this period,you will be able to1.analyze the forms and features of the present perfect passive voice.2.find out the differences in meaning and function between the active and passive forms.3.master the functions of the present perfect passive voice in the

2、 context and use it in real situations.What aspects in your life have been changed since the appearance of the Internet?Lead in BeforeAfterTransport Reading Payment Entertainment Try to tell the changes according to the table using the present perfect passive voice.foot;bike;bus;train plane;high-spe

3、ed railpaper books E-books in cash;by credit E-payment watch movies in the theaterStream movies and music;chat online1.Jans life has been greatly improved by the Internet.The Internet has greatly improved Jans life.2.Much has been written about the wonders of the World Wide Web.People have written m

4、uch about the wonders of the World Wide Web.Observe and analyze Underline and compare the different verb forms.Active _Passive _The form of the present perfect passive voiceVerb formhave/has+v-ed have/has been+v-edPracticeChange the sentences into the present perfect passive voice.ExampleThey have b

5、uilt a kind of new 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?4.Have you pressed the button yet to copy the file?5.Has any

6、one made a comment about the online database?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?4.Have you pressed the button yet to copy the file?5.Has anyone made a comment about the online database?The

7、software has been downloaded to help my phone battery last longer.An identity card has been lost.Has the Wi-Fi password been confirmed?Has the button been pressed yet to copy the file?Has a/any comment been made about the online database?What are the differences in meaning and function between the a

8、ctive and passive forms?The object in an active sentence becomes the subject in a passive sentence.Both sentence types convey a similar meaning,but they are slightly different.Active sentences are used often,as they are more direct.Passive sentences are often used when the doer of an action is unkno

9、wn,not important,or preferred not named.We use it when something has been done by someone at sometime up to now.We are not interested in the actor(行动者).Subject and its verb should be in a agreement.the present perfect passive voiceComplete the notice with the correct forms of the verbs in brackets.(

10、Workbook P75 Activity 4)Notice to parentsDear Parents,We hope you will welcome this news.Almost 100 computers _(give)to us by a local computer company since the end of last year.A decision _(make)to begin a computer teaching experiment at our school.Our plan _(support)with technical equipment and ad

11、vice which _(provide)by the City Information Technology Center.Every teacher _(provide)with a laptop since the beginning of this term.More importantly,most of our courses _(teach)using computers.We _(help)in our teaching by a lot of information from the Internet.Also,a new computer room _(set up)in

12、our school.We hope you will be happy with this exciting new development in our school.No.8 Senior High Schoolhas been madehas been givenhas been supportedhas been providedhas been providedhave been taughthave been helpedhas been set upEnjoy the poemLook at the way your face has been washedLook at th

13、e 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 again1.What are the subjects of your poems?2

14、.Can you list some verbs connected to the subjects?3.Can you make a sentence according to the example?Films,pictures,flowers,trees Make,paint,plantLook at the way the pictures have been painted.Look at the way the films have been made.BrainstormWritingThink of your own situation and write a similar

15、poem.Look at the way your 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 youl

16、l come here againYour poem？Have you used the present perfect passive voice in your writing?Is your writing clear and logical?Are all the word spelt correctly?Is your handwriting easy to read?Self-assessmentLook at the way the picture has been paintedLook at the way the film has been madeLook at the

17、way the poem has been writtenNow think about what you could create Look at the way the needy have been helpedLook at the way the river has been cleanedLook at the way the tree has been plantedNow think how to make the world a better placeFinish the Activities 2、3、5 in Using Structure of Workbook on page 74-75.