Unit3 The Internet Discovering useful structures课件+音视频-新人教版必修二.pptxVIP

UnitTheInternet

Period3Discoveringusefulstructures（人教版2019）必修二第册二

01LearningobjectivesContent02Preparation03Practice0506Presentation07Production04Summary08HomeworkAssessment

Learningobjectives1.Toanalyzetheformandfeatureofthepresentperfectpassivevoice;2.Tofindoutthedifferencesinmeaningandfunctionbetweentheactiveandpassiveforms;3.Tomasterthefunctionofthepresentperfectpassivevoiceinthecontextanduseitinrealsituations.

1.Jan’slifehasbeengreatlyimprovedbytheInternet.TheInternethasgreatlyimprovedJan’slife.2.MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.PeoplehavewrittenmuchaboutthewondersoftheWorldWideWeb.Underlineandobservethedifferentverbforms.Preparation

Active__________________Passive_________________Theformofthepresentperfectpassivevoice

Verbformhave/has+v-edhave/hasbeen+v-edPreparation

Readandobservemoresentences.1.MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.2.People’sliveshavebeenchangedbyonlinecommunitiesandsocialnetworks.3.Manypeoplehavebeenhelpedbytheclub.4.Jan’slifehasbeengreatlyimprovedbytheInternet.have/hasbeendoneThepresentperfectpassivevoice.（现在完成时的被动语态）Preparation

Presentperfectpassivevoice：现在完成时的被动语态肯定形式：Hishomeworkhasbeenfinished.否定形式：Hishomeworkhasnotbeenfinished.一般疑问句:Hashishomeworkbeenfinishedyet?特殊疑问句：Howlonghashishomeworkbeenfinished?主语+have/hasbeendone...主语+have/hasnotbeendone...have/has+主语+beendone...?疑问词+have/has+主语+beendone...?结构形式Presentation

Presentperfectpassivevoice：用法1.现在完成时的被动语态同它的主动语态一样，强调过去的动作对现在造成的影响或结果，主语和谓语之间为被动关系，通常与already,yet,just,never,recently等副词连用。例：Themachinehasalreadybeenrepaired.2.表示一个被动的动作或状态开始于过去，持续到现在，并可能持续下去，常与for或since引导的时间状语连用，或用于“Howlong...?”句型中。例：Financialproblemsofthecompanyhavebeendiscussedfornearlytwohours.Howlonghasthisfilmbeensho