人教版（2019）必修 第二册Unit3 The Internet Discovering Useful Structures 现在完成时被动语态课件（共22张PPT)

(课件网) Unit 3 The Internet Discovering Useful Structures Talk about something that has been done 现在完成时的被动语态 Read the pairs of sentences. Underline and compare the different verb forms. Jan’s life has been greatly improved by the Internet. Much has been written about the wonders of the World Wide Web. The Internet has greatly improved Jan’s life. People have written much about the wonders of the World Wide Web. The students have cleaned the classroom. The classroom has been cleaned. You needn’t clean it now. 现在完成时 active passive 表示说话时已经完成的被动性的动作或结果，主语是动作的承受者。 现在完成时的被动语态 现在完成时 被动语态 have/has been done 现在完成时的被动语态 be done have/has been How do we form the present perfect passive voice 现在完成时的被动语态 Let’s learn Read the pairs of sentences. Underline and compare the different verb forms. Jan's life has been greatly improved by the Internet. Much has been written about the wonders of the World Wide Web. The Internet has greatly improved Jan’s life. People have written much about the wonders of the World Wide Web. How do we form the present perfect passive voice Fill the blank. Let’s learn Verb form Active Passive have/has + v-ed _____ have/has been + v-ed Change the sentences into the present perfect passive voice. EXAMPLE They’ve 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 confirmed the Wi-Fi password 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 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 present perfect passive voice 3.Jan's life has been greatly improved by the Internet. 2.Their lives have been changed by Jan. 3.The Internet has greatly improved Jan's life. 2.Jan has changed their lives. 1.The club has helped many people. Underline and compare the different verb forms. Verb form Active: Passive: have/has done have/has been done 1.Many people have been helped by the club. present perfect active voice How Examples 1.The Internet has greatly improved Jan’s life. 2.People have written much about the wonders of the World Wide Web. Jan's life has been greatly improved by the Internet. Much has been written about the wonders of the World Wide Web. When object 1.the subject is having something done to it 2.the doer of an action is unknown,or not important,or perferred not named. similar meaning doing an action having something done to it subject the doer of an action is not necessarily mentioned subject Similarities and differences in meaning and function 1 2 1 2 convey a similar mean ... ...