2019-2020学年高中英语Unit4WildlifeProtectionSectionBLearningaboutLanguage课件新人教版必修2

Unit4WildlifeprotectionSectionB

LearningaboutLanguage单元语法现在进行时的被动语态一、构成肯定式：主语+am/is/are+beingdone.否定式：主语+am/is/arenot+beingdone.一般疑问式：Am/Is/Are+主语+beingdone?特殊疑问式：疑问词+am/is/are+（主语+）beingdone?二、用法（1）表示说话时正在进行的被动动作。（2）表示现阶段正在进行的被动动作，说话时不一定在进行。（3）表示一种经常性的被动行为，常与always，constantly，frequently等表示频度的副词连用，带有赞赏或厌恶等感情色彩。（4）表示按计划或安排将要发生的被动动作（仅限于少数及物动词）。三、注意事项（1）一些表示状态、心理活动、拥有、存在等的动词，如have，want，need，love，realize等，一般不用于进行时，因而也没有进行时的被动语态，而常用一般现在时的被动语态表示此刻或目前主语正承受谓语动词表示的动作。玛丽，过来，有你的电话。Mary，comehere.You’rebeingwantedonthephone.（×）Mary，comehere.You’rewantedonthephone.（√）（2）少数动词用于现在进行时态，用主动形式表示被动含义，如print，cook，fry，hang等。（3）“be+in/on/under+名词”常含被动意义，可代替现在进行时的被动语态。（4）因为被动语态的基本结构为bedone，不少学生误将现在进行时的被动语态结构“am/is/are+beingdone”写成一般现在时的被动语态结构“am/is/are+done”。瞧，这条道路正在建设中。Look!Theroadisbuilt.（×） Look!Theroadisbeingbuilt.（√）晚宴正由克里斯蒂娜准备着。ThedinnerispreparedbyChristina.（×）ThedinnerisbeingpreparedbyChristina.（√）四、句型转换现在进行时的被动语态与现在分词的被动式beingdone均可表示正在进行的被动动作，因此它们之间可以相互转换。◆误区警示非谓语动词的被动形式，表达不同时间的被动意义，作用也不一样。tobedone：不定式的被动形式，表将来和被动beingdone：现在分词的被动形式，表进行和被动havingbeendone：现在分词完成式的被动形式，表完成和被动练习一单句语法填空(1)Look!Thebaby_____________（take）careofbyheraunt.(2)［词汇复现］Anewhouse___________________（decorate）outsideourschoolatpresent.(3)Anewlibrary_____________（build）here.Theyhopetofinishitnextmonth.(4)Hi，I’mAlice.Lookatthisphoto—asnowman_____________（make）byme.(5)Atpresentanewhome_____________（build）forpandas.(6)Isthebridge_____________（repair）now?isbeingtaken

isbeingdecorated

isbeingbuiltisbeingmade

isbeingbuilt

beingrepaired(7)Toourdelight，manyendangeredspecies__________________（protect）bythegovernmentnow.(8)Manyinterestingexperiments_______________（carry）outthesedays.(9)Sinceyourbike_______________（repair），youcanusemine.(10)Daisyhasfoundthatalotofantelopes_______________（hunt）andkilledforthewoolbeneaththeirstomachsnow.

(11)Thenewgenerationofcomputers，withartificialintelligence，__________________（develop）andperfectednow.arebeingprotected

arebeingcarried

isbeingrepaired

arebeinghunted

arebeingdeveloped(12)［2017·江苏卷］Hehurriedhome，neveroncelookingbacktoseeifhe__________（follow）.(13)—Idon’tsupposethepoliceknowwhodidit.—Well，surprisinglytheydo.Amanhasbeenarrestedand__________________（question）now.(14)—Haveyouhandedinyourschoolworkyet?—Yes，Ihave.Iguessit_______________（grade）now.(15)—What’sthatnoise?—Oh，Iforgottotellyou.Thenewmachine_______________（test）.wasbeingfollowed

isbeingquestioned

isbeinggraded

isbeingtested练习二单句写作(1)Thesebirds__________________（正在被保护）wellhere.(2)Thesportsmeeting__________________（正在被举办）inourschool.(3)Howmanybuildings__________________（正在被修建）inthetown?(4)Thegiantmachine__________________（被拆卸）atthemomentanditwillbefixedupinthenewworkshopinthenearfuture.(5)Theclassroom__________________（被装饰）withballoonsandflowersrightnowandthestudentsarepreparingfortheNewYearparty.arebeingprotected

isbeingheldarebeingbuiltisbeingtakenapart

isbeingdecorated

(6)Itisreportedthatmanyanewhouse__________________（正在被建造）atpresentinthedisasterarea.(7)He______________________（总是受到表扬）bytheteacher.(8)Thewindowofourclassroom__________________________（经常被打破）.(9)Thesumthesecomputerswillcostus__________________（正在计算中）.(10)Withthepopulationincreasing，moreland__________________（需要）.isbeingbuiltisalwaysbeingpraised

isfrequentlybeingbroken

isbeingcalculated

isneeded

练习三句型转换(1)请告诉我此刻正在举行的会议的有关情况。Pleasetellmesomethingaboutthemeetingbeingheldnow.=Pleasetellmesomethingaboutthemeeting________________________.(2)我发现国旗正在升起。Ifindthenationalflagisbeingraised.=Ifindthenationalflag____________.(3)电脑现在正在使用中。Thecomputerisinusenow.=Thecomputer_____________now.whichisbeingheldnow

beingraised

isbeingused(4)近来这些高科技产品正在展出中。Thesehigh-techproductsareondisplaythesedays.=Thesehigh-techproducts__________________thesedays.(5)此刻，那座城堡正遭到袭击。Thecastleisunderattackatthemoment.=Thecastle__________________atthemoment.arebeingdisplayed

isbeingattacked(6)这条公路正在修建/建造中。Thehighway