英语(2019新教材) 人教必修第二册Unit3Period 4 Discovering Useful Structure 课件.pptx

1、Unit 3 The Internet Discovering Useful Structures Teaching objectives: By the end of this period, you will be able to 1.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

2、 of the present perfect passive voice in the context and use it in real situations. What aspects in your life have been changed since the appearance of the Internet? Lead in Before After Transport Reading Payment Entertainment Try to tell the changes according to the table using the present perfect

3、passive voice. foot; bike; bus; train plane; high-speed rail paper books E-books in cash; by credit E-payment watch movies in the theater Stream movies and music ; chat online 1. Jans life has been greatly improved by the Internet. The Internet has greatly improved Jans life. 2. Much has been writte

4、n about the wonders of the World Wide Web. People have written much 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 voice Verb form have/has +v-ed have/has been +v-ed Practice Chan

5、ge the sentences into the present perfect passive voice. Example They have built 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 confir

6、med 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? 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 pre

7、ssed 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 been lost. Has the Wi-Fi password been confirmed? Has the button been pressed yet to copy the file? Has a/any comm

8、ent been made about the online database? What are the differences in meaning and function between the active 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

9、are used often, as they are more direct. Passive sentences are often used when the doer of an action is unknown, 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

10、a agreement. the present perfect passive voice Complete the notice with the correct forms of the verbs in brackets. (Workbook P75 Activity 4) Notice to parents Dear 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.

11、 A decision _(make) to begin a computer teaching experiment at our school. Our plan _(support) with technical equipment and advice 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 course

12、s _(teach) using computers. We _(help) in our teaching by a lot of information from the Internet. Also, a new computer room _(set up) in our school. We hope you will be happy with this exciting new development in our school. No. 8 Senior High School has been made has been given has been supported ha

13、s been provided has been provided have been taught have been helped has been set up Enjoy the poem Look at the way your face has been washed Look at the way your teeth have been brushed Look at the way your shoes have been cleaned Youd better do them again Look at the way the flowers have been plant

14、ed Look at the way the grass has been cut Look at the way the paths have been swept I hope that youll come here again 1. What are the subjects of your poems? 2. Can you list some verbs connected to the subjects? 3.Can you make a sentence according to the example? Films, pictures, flowers, trees Make

15、, paint, plant Look at the way the pictures have been painted. Look at the way the films have been made. Brainstorm Writing Think of your own situation and write a similar poem. Look at the way your face has been washed Look at the way your teeth have been brushed Look at the way your shoes have bee

16、n cleaned Youd better do them again Look at the way the flowers have been planted Look at the way the grass has been cut Look at the way the paths have been swept I hope that youll come here again Have you used the present perfect passive voice in your writing? Is your writing clear and logical? Are

17、 all the word spelt correctly? Is your handwriting easy to read? Self-assessment Look at the way the picture has been painted Look at the way the film has been made Look at the way the poem has been written Now think about what you could create Look at the way the needy have been helped Look at the way the river has been cleaned Look at the way the tree has been planted Now think how to make the world a better place Finish the Activities 2、3、5 in Using Structure of Workbook on page 74-75.