Unit 3 The Internet Discovering Useful Structures 课件-2023-2024学年高中英语人教版（2019）必修第二册

Unit 3 The Internet Discovering Useful Structures present(now) future past 过去的动作一直持续到现在 过去的动作对现在产生影响 The Present Perfect Tense 1. Much has been written about the wonders of the World Wide Web. 2. People’s lives have been changed by online communities and social networks. 3. Many people have been helped by the club. 4. Jan’s life has been greatly improved by the Internet. 1. People have written much about the wonders of the World Wide Web. 2. Online communities and social networks have changed people’s lives. 3. The club has helped many people. 4. The Internet has greatly improved Jan’s life. Which group is better? Why? Compare and Find Present perfect passive voice Change the sentences below into the present perfect passive voice. 1. I have downloaded the software to help my phone battery last longer. The software has been downloaded to help my phone battery last longer. 2. Someone has lost an identity card. An identity card has been lost. 3. Have you confirmed the Wi-Fi password? Has the Wi-Fi password been confirmed? 4. Have you pressed the button yet to copy the file? Has the button been pressed yet to copy the file? 5. Has anyone made a comment about the online database? Has a / any comment been made about the online database? Present perfect passive voice 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 1. Much has been written about the wonders of the World Wide Web. 2. People’s lives have been changed by online communities and social networks. 3. Many people have been helped by the club. 4. Jan’s life has been greatly improved by the Internet. 5. The software has been downloaded to help my phone battery last longer. 6. Has the Wi-Fi password been confirmed? 7. Has the button been pressed yet to copy the file? 8. An identity c