高一英语必修2第四单元语法

,Unit4-WildlifeProtection,Period4:GrammarPresentProgressivePassiveVoice现在进行时的被动语态,TheTenseoftheThePassiveVoice,1.Presentpassivevoice:am/is/are+p.p.TheOlympicGamesareusuallyheldinbigcities.2.Pastpassivevoice:was/were+p.p.ThelastOlympicGameswereheldinAthens.,3.Futurepassivevoice:will/shall+be+p.p.The2008OlympicGameswillbeheldinBeijing.am/is/are+goingtobe+p.p.The29thOlympicGamesaregoingtobeheldinBeijingin2008.,am/is/are+tobe+p.p.The29thOlympicGamesaretobeheldinBeijingin2008.4.Perfectpassivevoice:have/has+been+p.p.TheOlympicGameshavebeenheld28times.,5.Presentcontinuouspassivevoice:am/is/are+being+p.p.-Whyitissonoisyoutthere?-Oh,itsbecausetheroadisbeingrepaired.,Completethesentencesaccordingtothetext.1.We_forthewoolbeneathourstomachs.(Line9)2.Ourfur_tomakesweatersforpeoplelikeyou.(L10)3.Iwonderwhat_tohelpyou.(L12)4.Sogoodthings_heretosavelocalwildlife.(L25),arebeingkilled,isbeingused,isbeingdone,arebeingdone,1.Discoverwhatstructureisused,whatstructureisused,Summary: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)+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。,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.,Someculturalrelicsarebeingappreciatedbyexperts.,He_(bite)byamosquito.,isbeingbitten,2.表现阶段正在进行的被动动作。,Theeffectofthenewdrugisbeingstudiedatpresentbyscientist.,Thehabitatofthepandaisbeingprotectedbythelocalpeople.,Thehabitatofthepandaisbeingprotectedbythelocalpeople.,3.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。,Afolksongisbeingsungnext.,下面将唱一首民歌。,4.be+under/in+V.可代替进行时被动语态,e.g.Thebridgeisunderrepair.Thebridgeisbeingrepaired.e.g.Thetelephoneisinuse(=isbeingused)now.,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!Thechildrenarebeingtakencareofbytheiraunt.瞧!孩子们现在正由姑姑照看着。(指现在的情况)Childrenaretakengoodcareofatschool.孩子们在学校被照看得很好。(指通常的情况),e.g:1.Theyarebuildinganewlibrarynow.被动,Anewlibraryisbeingbuiltnow.,Manyanimalsarenotbeingprotectedwellenough.,Isthebridgebeingrepairednow?,2.Manyanimalsarebeingprotectedwellenough.否定句,3.Thebridgeisbeingrepairednow.疑问句,AhugeChristmastree_(decorate),isbeingdecorated,Christmaspresents_(send)tochildren,arebeingsent,ManyChristmaspresents_(buy)bymyparents.,arebeingbought,AwonderfulChristmasfeast_(enjoy)bymyfamilies.,isbeingenjoyed,典型例题,Anewcinema_here.Theyhopetofinishitnextmonth.（2001北京春季卷）A.willbebuiltB.isbuiltC.hasbeenbuiltD.isbeingbuilt2.Ihavetogotoworkbytaxibecausemycar_atthegarage.(2006重庆卷)A.willberepairedB.isrepairedC.isbeingrepairedD.hasbeenrepaired,3.-Haveyoumovedintothenewhouse?-Notyet.Therooms_.A.arebeingpaintingB.arepaintingC.arepaintedD.arebeingpainted,4Rainforests_andburnedatsuchaspeedthattheywilldisappearfromtheearthinthe