Unit 3 Discovering Useful Structures 课件--高中英语人教版（2019）必修第二册.pptx

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1、 Unit 3 The InternetPeriod 3Discovering Useful StructuresJans life has been greatly improved by the Internet.Much has been written about the wonders of the World Wide Web.Lets learnRead the pairs of sentences.Underline and compare the different verb forms.The Internet has greatly improved Jans life.

2、People have written much about the wonders of the World Wide Web.Verb form(动词形式)How do we from the present perfect passive voice?Fill the blank.Active(主动主动)have/has+v-edPassive(被动被动)_have/has +been v-ed现在完成在完成时(主主动语态)结构：have/has+done现在完成在完成时的被的被动语态结构：have/has+been done现在完成时的被动语态现在完成时的被动语态1.结构：have/h

3、as+been done2.概念：强调一个发生在过去的被动性动作，它有两层意思：动作已经完成，强调对现在造成的结果或影响；主语与谓语动词之间为被动关系。Jans life has been greatly improved by the Internet.现在完成时的被动语态现在完成时的被动语态1.结构：have/has+been done2.概念：强调一个发生在过去的被动性动作，它有两层意思：动作已经完成，强调对现在造成的结果或影响；主语与谓语动词之间为被动关系。Jans life has been greatly improved by the Internet.Change the se

4、ntences into the present perfect passive voice.译:把句子转换成现在完成时的被动语态 Theyve built a kind of new PC with more functions.A kind of new PC has been built with more functions.EXAMPLEI have downloaded the software to help my phone battery last longer.Someone has lost an identity card.The software has been d

5、ownloaded 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 f

6、ile?Has a/any comment been made about the online database?区分区分现在完成时现在完成时的被动语态、的被动语态、现在进行时现在进行时的被动语态的被动语态1.现在完成时的被动语态 (have/has+been done)The machine has been repaired.说明动作发生在过去,对现在有影响,”现在修好了”。2.现在进行时的被动语态 (be+being done)The machine is being repaired now.说明动作正在进行。Read the poem.Look at the way your fa

7、ce 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 planted Look at the way the grass has been cutLook at the way the paths have been swept I hope that youll come here again.SummarysummaryKnowledge points:function,battery,confirm,Wi-Fi,press,button,fileOthers:Talk about something that has been doneThe present perfect passive voicePoemHomework