高一英语必修2第四单元语法ppt课件.ppt

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1、Unit4---WildlifeProtectionPeriod4:GrammarPresentProgressivePassiveVoice现在进行时的被动语态1TheTenseoftheThePassiveVoice1.Presentpassivevoice:am/is/are+p.p.TheOlympicGamesareusuallyheldinbigcities.2.Pastpassivevoice:was/were+p.p.ThelastOlympicGameswereheldinAthens.23.Futurepassivevoice:will/shall+be+

2、p.p.The2008OlympicGameswillbeheldinBeijing.am/is/are+goingtobe+p.p.The29thOlympicGamesaregoingtobeheldinBeijingin2008.3am/is/are+tobe+p.p.The29thOlympicGamesaretobeheldinBeijingin2008.4.Perfectpassivevoice:have/has+been+p.p.TheOlympicGameshavebeenheld28times.45.Presentcontinuouspassivevoice

3、:am/is/are+being+p.p.--Whyitissonoisyoutthere?--Oh,it’sbecausetheroadisbeingrepaired.5Completethesentencesaccordingtothetext.1.We________________forthewoolbeneathourstomachs.(Line9)2.Ourfur______________tomakesweatersforpeoplelikeyou.(L10)3.Iwonderwhat______________tohelpyou.(L12)4.Sogoodth

4、ings________________heretosavelocalwildlife.(L25)arebeingkilledisbeingusedisbeingdonearebeingdone1.Discoverwhatstructureisusedwhatstructureisused6Summary:现在进行时的被动语态e.g.1.Anewlibraryisbeingbuiltnow.2.Someanimalsarenotbeingprotectedwellenough.3.Isthebridgebeingrepairednow?1.构成：am/is/are(not)+

5、being+V-过去分词2.意义：…正在被做.定义：现在进行时被动语态表示说话时或现阶段某个被动的动作正在进行。7现在进行时的被动语态基本用法：表示现在正在进行的被动动作。eg:Maryisbeinginterviewednow.8Someculturalrelicsarebeingappreciatedbyexperts.9He______________(bite)byamosquito.isbeingbitten102.表现阶段正在进行的被动动作。Theeffectofthenewdrugisbeingstudiedatpresentbyscientist.11Theh

6、abitatofthepandaisbeingprotectedbythelocalpeople.12Thehabitatofthepandaisbeingprotectedbythelocalpeople.133.少数及物动词的进行时表示按计划、安排将要承受某个动作。Anpartyisbeingheldtonight.今晚将要举办一场晚会。A folk songis being sungnext.下面将唱一首民歌。144.be+under/in+V.可代替进行时被动语态e.g.Thebridgeisunderrepair.Thebridgeisbeingrepaired.e

7、.g.Thetelephoneisinuse(=isbeingused)now.15如果去掉being,就成为一般现在时被动语态或系表结构。试比较下列句子:Look! The children arebeingtaken care of bytheiraunt.瞧!孩子们现在正由姑姑照看着。(指现在的情况)Children are taken good care of at school.孩子们在学校被照看得很好。(指通常的情况)16e.g:1.Theyarebuildinganewlibraryno