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

Discovering Useful Structures The Present Perfect Passive Voice Unit 3 The Internet 【版本：人教　册别：必修二】 2024年2月28日 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. 被动语态 主动语态 Read the pairs of sentences. Underline and compare the different verb forms. have/has been + done have/has + done Change the sentences into the present perfect passive voice. I have downloaded the software to help my phone battery last longer. Someone has lost an identity card. The software has been downloaded to help my phone battery last longer. An identity card has been lost. ↓ ↓ Have you confirmed the Wi-Fi password? Have you pressed the button yet to copy the file? Has anyone made a comment about the online database? 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? ↓ ↓ ↓ Change the sentences into the present perfect passive voice. Look at the more sentences and summaries when to use the present perfect. The room has already been cleaned. The professor hasn’t been sent for yet. --Has her homework been finished up till now? --Yes, it has. The car has been repaired for two hours. I have worked in Bashu Secondary school since I graduated from the university. 现在完成时用法： 1. 过去发生的动作对现在的影响或产生的结果，着眼点在现在。 2. 动作从过去开始一直持续到现在。 现在完成时常见时间状语： 1.自从： since 2. 到目前为此： so far, up to now, up till now, till now, up to present, by now 3. 在过去的一段时间： in/during/over the past/last +时间段 4. 近来 recently/lately in recent days/weeks/years for these years 5. 强调影响或结果： already/yet/never/just 6. It is the first time that sth/sb have/has done: e.g.: It is the first time that we have conducted such a online survey. 现在完成时与一般过去式的区别： --Look, Somebody has broken the window! ---Oh, it wasn’t me. I didn’t do it. I playe