Unit 2 Wildlife Protection Discovering useful structures 现在进行时的被动语态 课件-【知识精研】高中英语人教版2019 必修第二册

Unit2WildlifeProtectionDiscoveringusefulstructuresWhatdoyouknowaboutwildlifeprotection?Step1.LeadinOurplanet’swildlifeisdyingoutatanalarmingrate.Between150and200speciesarebecomingextincteveryday.Wildlifeisbeinghunted.Whatmeasuresarebeingtakentohelpthem?Step2.PresentationToreportanongoingevent.Whatarethewordsinredusedfor?Ourplanet’swildlifeisdyingoutatanalarmingrate.Between150and200speciesarebecomingextincteveryday.Wildlifeisbeinghunted.Whatmeasuresarebeingtakentohelpthem?ThePresentContinuousPassiveVoice现在进行时被动语态21现在进行时的被动语态结构：am/is/are+

doing1.

Wearedoingmanythingstoprotecttheanimals.3.

WeareseeingtheTibetanantelopesnextweek.2.

WeareobservingtheTibetanantelopesthesedays.

一、presentcontinuoustense

现在进行时此时此刻正在进行的动作表示现阶段在做的动作表示即将发生的动作结构：be+done英语动词有两种语态：

主动语态

(theactivevoice)

被动语态(thepassivevoice)

二、thepassivevoice

被动语态A.主动语态表示主语是动作的执行者Weplantedthetree.B.

被动语态表示主语是动作的承受者Thetreewasplantedbyus.现在进行时：am/is/are+V-ing被动语态：

be+done(V过去分词)现在进行时的被动语态：主语+

am/is/are+being+done+(by…)三、现在进行时的被动语态1.结构

表示“某人/事此时此刻正在被…”，主语是动作的承受者,表示说话时或现阶段某个被动的动作正在进行。2.定义

e.g.Theyarebeinghunted,illegally,fortheirvaluablefur.(1)肯定形式：主语

+

be(am/is/are)＋being＋doneThehouseisbeingpainted.(2)否定形式：主语

+be(am/is/are)＋not＋being＋doneThetreesarenotbeingwatered.(3)一般疑问形式：be(Am/Is/Are)

＋

主语

＋

being

＋

done？AmIbeingwatchedover?(4)特殊疑问句形式：特殊疑问词

+

be(am/is/are)

+

主语

+

being

+

done？3.基本结构When

isthewallbeingpainted

?【即时演练1】——句型转换Theyarebuildingamodernschoolinhishometown．①Amodernschool__________________inhishometown.(改为被动语态)②Amodernschool_________________inhishometown.(把句①改为否定句)③_________________________inhishometown？(把句①改为一般疑问句)④_______________________________(对句①就inhishometown进行提问)Whereisamodernschoolbeingbuilt？Isamodernschoolbeingbuiltisn’tbeingbuiltisbeingbuilte.g.Maryisbeinginterviewed

now.4.基本用法：①

表示说话时正在进行的被动动作，句中常有now,rightnow,atthemoment,atpresent

等时间状语。②

表示现阶段正在进行的被动动作。(说话时不一定在进行)e.g.Theseanimalsarebeinghuntedatsuchahighspeedthattheywilldisappearsoon.e.g.Apartyisbeingheld

tonight.③

现在进行时的被动语态有时可表示按计划或安排将要进行的一个被动动作(此种用法仅限于少数及物动词,如:hold,take等)。④

表示一种经常性的被动行为,常与always,constantly,frequently

等词连用,往往带有赞扬、羡慕、埋怨、讨厌等感情色彩。e.g.Childrenofourneighborsarealwaysbeingpraised

byourparents.小试牛刀1、Theyarelivingwiththeirparentsforthemomentbecausetheirownhouse

(rebuild).2、Ifeelverysurprisedthatthewindowofourclassroom

(often,break).3、I'mgoingtoaphotographicexhibitionwhich

(hold)thesedays.4、Withthedevelopmentofsociety,manytraditionalideas

(change)now.

isbeingrebuiltisoftenbeingbrokenisbeingheldarebeingchangede.g.Look！Thechildrenarebeingtaken

careofbytheiraunt.e.g.Childrenaretakengoodcareofatschool.

1、不可遗漏being。现在进行时的被动语态表示说话时正在进行的一个被动的动作，如果我们把being漏掉，即成为一般现在时的被动语态或系表结构。注意事项(一般现在时的被动语态)注意事项2、许多

“不及物动词+副词或介词”

或“及物动词+宾语+介词”构成的短语动词，相当于及物动词，可以有被动语态。变被动语态时不可漏掉介词或副词:laughat,

operateon,lookafter,takecareof,thinkof,talkabout,handin,catchsightof,makeuseof,payattentionto...e.g.

Mysisterisbeingtakencarebygrandma.

e.g.

Thepatientisbeingoperatednow.ofon玛丽,过来,有你的电话。Mary,comehere.

You

arebeingwanted

onthephone.Mary,comehere.

You

arewanted

onthephone.3、没有进行时的被动语态：一些表示状态、心理活动、拥有、存在等的动词，如have,want,need,like,realize等，一般不用于进行时的被动语态，而常用一般现在时的被动语态表示此时此刻或目前主语正在承受谓语动词表示的动作。注意事项4、“be+under/in+名词”结构有时可相当于现在进行时的被动语态。

isbeingattacked

The

city

is

underattack

at

the

moment.

1、这个问题正在会议上讨论。2、电话现在正在被使用。注意事项Theproblemisunderdiscussion

(=isbeingdiscussed)atthemeeting.Thetelephoneisinuse

(=isbeingused)now.Mycomputerisunderrepair.＝Mycomputerisbeingrepaired.Translation:1、专家正在讨论停止非法狩猎的方法。（illegal）Thewaystostopillegallyhuntingarebeingtalkedaboutbyscientists.2、本周末将举行一场庆祝他成功的活动。（celebrate）Acelebrationisbeingheldthisweekendforhissuccess.3、随着人口的增加，我们需要更多的土地。（population）Withthepopulationincreasing，morelandisneeded.4、我的电脑正在修理中（repair）

LiuTaowouldliketoexpresshisconcernoverthewetlandinhishometown.Helphimfinishthepassagewiththepresentcontinuouspassivevoiceoftheverbsinbrackets.

Inthewetlandofmyhometown,therearemanydifferentkindsofanimals,includingwildbirds,fish,snakes,insectsandsoon.WhenIwasinprimaryschool,Ioftenwenttherewithmyfriendstowatchthebirdsandstudythem.Thatwasaninterestingplaceforallofus.Butthingshavebeguntochangeinrecentyears.Smallbirds________________(catch)withnets.Wildducks__________(sell)atfoodmarkets.Fishandsnakes_______________(kill)forfoodinrestaurants.Andevenworse,thewetland________________(destroy).Somepart__________________(cover)withnewhouses.Youcanseerubbishe