人教版高中英语必修第二册UNIT2 Period4课件

Period４UNIT2

WILDLIFFPROTECTION主题语境人与自然

——人与动植物课时学案单元语法讲练(DiscoveringUsefulStructures)1．reducevt．减少(1)reduce...by...

把……减少了……reduce...to...

把……减少到……bereducedto 陷入某种境地；使沦为(to为介词)(2)reductionn．

减少[即学即练]

单句语法填空/完成句子①Theculturalrelic____________(reduce)toruins，whichmadeusdepressed．②Asisknowntoall，usingcleanenergyplaysanimportantroleinpollution________(reduce)．③由于大雾，司机不得不把速度减到每小时40千米。Itwasfoggysothedriverhadto________________fortykilometresanhour．wasreducedreductionreducespeedto2．dueadj．由于；因为；到期的；预期的；适当的；应得的dueto

由于；因为beduetodosth．

预定/计划做某事beduetosb．

应支付/给予/归于某人[名师点津]

表示“由于/因为”的词或短语还有：for，because，becauseof，owingto，thanksto等。[即学即练]

单句语法填空/完成句子①Theexpresstrainisdue_________(arrive)at10：00p．m．，soremembertomeetmeontime．②Ihavemissedplentyofbeautifulsunsets/sunrisesdue__beingonthespotonlyfiveminutesbeforethebestmoment．③由于我的英语老师的帮助，我的英语成绩总是不错。______________________________，myEnglishscoresarealwaysnotbad．toarrivetoDuetomyEnglishteacher'shelp一、含义现在进行时的被动语态表示现在或现阶段正在进行或发生的被动动作，强调主语是动作的承受者。二、结构1．肯定式：主语＋am/is/are＋beingdone...Sometreesarebeingcutdowninthepark．公园里的一些树木正在被砍伐。现在进行时的被动语态2．否定式：主语＋am/is/are＋notbeingdone...Itisreportedthatthewaterinthelakeisnotbeingprotectednow．据报道，这个湖里的水现在没有得到保护。3．一般疑问式：Am/Is/Are(not)＋主语＋beingdone...?Arethebabiesbeingtakencareofbythisnurse？这些婴儿正由这个护士照看吗？4．特殊疑问式：疑问词＋am/is/are(not)＋主语＋beingdone...?Whenisthesportsmeetingbeingheldinourschool?我校将在什么时候举行运动会？[即时训练1]句型转换Theyarebuildingamodernschoolinhishometown．①_________________________________________.

(改为被动语态)②__________________________________________.(把①句改为否定句)AmodernschoolisbeingbuiltinhishometownAmodernschoolisn'tbeingbuiltinhishometown③_________________________________________(把①句改为一般疑问句)④_________________________________(对①句就inhishometown进行提问)Isamodernschoolbeingbuiltinhishometown?Whereisamodernschoolbeingbuilt?三、用法1．表示说话时正在进行的被动动作。句中常用now，atthemoment等时间状语。Myyoungersisterisnowbeinginterviewed．我妹妹现在正在接受采访。HeisnowbeingtreatedinChina．现在，他正在中国接受治疗。2．表示现阶段正在进行的被动动作(说话时不一定在进行)。Theseanimalsarebeinghuntedatsuchaspeedthattheywilldisappearsoon．以这样的速度捕杀这些动物，它们很快就会消失。3．表示一种习惯的被动行为，常与always，constantly，often等词连用，表示赞赏、羡慕、讨厌等感情色彩。Ifeelverysurprisedthatthewindowofourclassroomisoftenbeingbroken．我感到非常吃惊的是我们教室的那扇窗户经常被打破。Tomisalwaysbeingpraisedbytheteacher．汤姆总是被老师表扬。4．与某些情态动词连用，表示对正在发生的动作的推测。Jimmaybebeinginterviewedbythereportersattheverymoment．吉姆此刻可能正在被记者们采访。—DoyouknowwhatSmithisdoing?——你知道史密斯正在做什么吗？—Heisill．Hemaybebeingexaminedbythedoctor．——他病了。他可能正在接受医生的检查。[即时训练2]补全句子①Radiosoftheoldtype________________(正被替代)bynewones．②TheplantoexploretheSouthPole____________(正在被制订)thesedays．③He__________________(正在被采访)byourheadmasternow．arebeingreplacedisbeingmadeisbeinginterviewed四、使用现在进行时的被动语态应注意的问题1．不及物动词(短语)、非延续性动词、表示存在意义/所属关系/静态特征的动词以及系动词不用于现在进行时的被动语态。这本书是他的。[正]Thebookbelongstohim．[误]Thebookisbeingbelongedtohim．2．一些表示状态、心理活动、拥有、存在等的动词，如have，want，need，like，realize等，一般不用于现在进行时的被动语态，而常用于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。玛丽，过来，有你的电话。[正]Mary，comehere．You'rewantedonthephone．[误]Mary，comehere．You'rebeingwantedonthephone．3．“be＋under/in/on等介词＋名词”结构可表示现在进行时的被动语态的含义。Theproblemisunderdiscussion(isbeingdiscussed)atthemeeting．这个问题正在会上讨论。Thetelephoneisinuse(isbeingused)now．这部电话正在使用中。Manynewcarsareonshow(arebeingshowed)．许多新车正在展出。用所给词的适当形式填空LiMing：Hi，LinTao，ithasbeenseveralmonthssincewe1．___(meet)lasttime．Yousaidyouweretiredofyourworkandyou2．___________(find)anewjob．Whatareyoudoingnow?

LinTao：Oh，I3．_______________(train)fortheworkinthesupermarketthismonth．Youknow，asupermarket4．___________(build)inourtown，

andit5．________(be)openinabouttwomonths．Whereareyougoingnow?metwouldfindambeingtrainedisbeingbuiltwillbeLiMing：I6．_________(go)tothecentrestadium，wherethespringsportsmeeting7．___________(hold)．LinTao：Ihearthatacarexhibition8．___________(hold)there，too.

Whydon'tyoudrivethere?It'salongwayfromhere．LiMing：Thereissomethingwrongwithmycarandit9．______________(repair)inthegarage(汽修厂)．I10．__________

(lose)weightrecently，soI'dliketogothereonfoot．amgoingisbeingheldisbeingheldrepairedamlosing

isbeingLinTao：Isee．Thenwishyouagoodday!LiMing：Thankyou！Bye!LinTao：Bye!课下预习第二篇课文(ReadingforWriting)①whenitcomesto当涉及；一谈到②dolphinn．海豚YangtzeRiverDolphin白

豚③payattentionto关注④withoutvariety没有多样性⑤give...achance给……一个机会⑥cutdown砍伐⑦apartofthehabitat栖息地的一部分⑧koalan．树袋熊；考拉⑨inthisway这样；用这种方法⑩makeanimalshomeless让动物们无家可归GiveUglyaChance!Whenitcomesto①wildlifeprotection，allspecies—thegood，thebad，andtheugly—shouldbetreatedequally．Pandas，dolphins②，andothercutewildlifeareimportant，butwemustpayattentionto③lesscuteanimals，too．Theworldneedsallkinds—withoutvariety④

，ourplanetcannotsurvive．Soifyouwantthefuturetobebeautiful，youhavetogiveuglyachance⑤．[1][1]句中if引导条件状语从句。Don'tMakePaperwithMyHome!Billionsoftreesarebeingcutdown⑥everyyeartomakepaperforhumans．[2]Everytreetha