高中英语人教版 (2019)必修 第二册Unit 2 Wildlife protection教学ppt课件

这是一份高中英语人教版 (2019)必修 第二册Unit 2 Wildlife protection教学ppt课件，共26页。PPT课件主要包含了Leading-in，Part1，Leading in，Part2，Part3等内容，欢迎下载使用。

While-class
After-class
1.African elephants are being hunted.→_______________________________________2.What is being dne t help them?→_______________________________________3.What measures are being taken t help them?→_________________________________________Differences：________________________________
Underline the present cntinuus passive vice,change them int active vice and cmpare the differences in meaning.
所强调的重点（主语）不同。
Hunters are hunting African elephants.
What are peple ding t help them?
What measures are peple taking t help them?
1 reduce (1)vt.减少,缩小(尺寸、数量、价格等)reduce…t减少……到reduce…by 以(比例)……减少Csts have been reduced by 20% ver the past year.过去一年,成本已经减少了20%。(2)vt.使沦为,使陷入(不好的境地) be reduced t (ding) sth.使陷入(更坏的)境地;使沦落;使陷入窘境They were reduced t begging in the streets.他们沦落到沿街乞讨。The attentins f the media reduced her t tears.媒体的关注把她弄哭了。
(3)vt.使简化为reduce sth.t sth.将……概括成(或简化为)……We can reduce the prblem t tw main issues.我们可以将这个问题概括成两个要点。(4)vi.节食,减肥(=n a diet)She has been reducing fr the last few weeks.最近几个星期她一直在节食。
2 due (1)adj.应支付的;应有的,适当的He gt his due reward.他得到了应得的报酬。We paid due attentin t the prblem.我们对此问题给予了应有的注意。(2)adj.到期的The bill will be due next Mnday.这张账单下星期一到期。(3)adj.预定的,约定的be due t d预定做……The train is due t leave fr Shanghai at 8 ’clck.这趟列车定于8点出发去上海。(4)due t由于His success was due t the fact that he had been wrking hard.他的成功是由于他一直勤奋地工作。
3 in rder t in rder t为了;以便,后接动词原形,表示目的。in rder (nt) t d 为了(不)做……In rder t succeed,we must have a cmplete and thrugh plan.为了成功,我们必须要有一个周密的计划。Talk quietly in the reading rm in rder nt t disturb thers.在阅览室里,轻声说话,以免妨碍别人。归纳拓展in rder整齐的,井然有序的in rder+that从句 为了;以便(引导目的状语从句)
4 search fr 用法详解search fr搜索;查找They searched fr a spt where they culd sit n the flr.他们在地板上寻找一处能够坐下来的地方。The villagers are searching fr the missing child.村民们正在搜寻那个失踪的孩子。归纳拓展search…fr搜寻……以寻找in search f=in the/ne’s search fr搜寻lk fr寻找
5 put ut  (1)put ut把……摆好;预备好(物品) Have yu put ut clean twels fr the guests?你为客人预备好干净毛巾没有?(2)put ut熄灭;扑灭Firefighters sn put the fire ut.消防人员很快把火扑灭了。
(3)生产;制造(=t prduce)The factry puts ut 500 new cars a week.这家工厂每周生产500辆新汽车。(4)出版;广播;公布 (=t publish r bradcast)Plice have put ut a descriptin f the man they wish t questin.警方公布了他们想要讯问的那名男子的特征。
现在进行时的被动语态一、基本结构：  1．现在进行时态的被动语态的肯定式为：am/is/are + being + dne。 如：The questin is being discussed at the meeting nw.       这个问题现在正在会上被讨论。      Anther bridge is being built ver the Changjiang River at present.       目前长江上正在建造另一座大桥。  
2．现在进行时态的被动语态的否定式为：am/is/are + nt + being + dne。如：The baby isn’t being taken gd care f.   这婴儿没在得到很好的照顾。   The animals are nt being set free at present.   目前这些动物还不能被放出。  3．现在进行时态的被动语态的一般疑问句需将am/is/are 提到主语的前面。    ---Is a new library being put up in their schl nw？ ---Yes, it is.    甲：他们学校现在正在建一座新图书馆吗。乙：是，正在建一座新图书馆    ---Are a number f Dngfeng trucks being shipped abrad?  ---N, they aren’t.     甲：一批东风卡车正被运往国外吗？乙：不，没有。  
4．现在进行时态的被动语态的特殊疑问句为：疑问词 + am/is/are + (主语) + being + dne。  如：What is being dne t the machine?   现在对这台机器要采取什么措施？   Hw many huses are being built in the village?   村里正在建造多少房屋？   When is the sprts meeting being held in ur schl?     我校将在什么时候举行运动会？
二、用法：   1．现在进行时态的被动语态的同它的主动语态一样，表示现在正在进行的被动动作。     He is being interviewed by ur headmaster nw.   他正在接受我们校长的采访。     This film is being shwn nw.   这部电影正在被放映。  2．现在进行时态的被动语态的同它的主动语态一样，表示现阶段正在进行的被动动作。     The disease is being studied by scientists.   科学家们正在研究这种疾病。     These animals are being hunted at such a speed that they will disappear sn.    以如此速度捕杀动物，他们很快就会消失。
现在进行时被动语态五个提醒  一、不可遗漏being  现在进行时的被动语态表示说话时主语正在承受谓语动词的动作，谓语动词的形式为“is/are/am＋being＋过去分词”。如果把being漏掉，就成为一般现在时被动语态或系表结构。试比较下列句子： Lk！ The children are being taken care f by their aunt.  瞧！孩子们现在正由姑母照看着。 Children are taken gd care f at schl.  孩子们在校被照看得很好。（指通常情况）  The reprt is being written by ne f the best students.  报告正在由一个最好的学生写着呢。  The reprt is well written.  报告写得很好。（系表结构） 
二. 表示现阶段  现在进行时被动语态也可以表示目前这一阶段主语正在承受谓语动词的动作。 Many interesting experiments are being carried ut these days.  最近正在进行许多有趣的实验。（说话时，并不一定在进行）        
三. 表示计划或安排  现在进行时被动语态还可表示按计划、安排主语将要承受谓语动词的动作（仅限于bring，take，send，hld，sing，shw，play等表示移动的或能用来表示某项活动的少数及物动词）。  A flk sng is being sung next.  下面将演唱一首民间歌曲。 A party is being held tnight.   今晚将要举行一场晚会。 
四. 没有进行时被动语态  cntain，include，impress，feel，want，like，lve，satisfy，surprise，wn等一些表示状态、 心理活动、拥有等意义的动词（和主动语态一样）一般不用进行时被动语态，常用一般现在时被动语态表示此时此刻或目前主语承受谓语动词的动作。  Xia Wang, cme here. Yu are wanted n the phne. ?  小王，过来，有人打电话找你呢。  Ftball is becming mre and mre ppular. In ther wrds, it is lved by mre and mre peple.   足球现在越来越流行了，换句话说，它被越来越多的人喜爱。 
五. 其它形式表示被动结构  “be＋under/in等介词＋名词”结构可代替进行时被动语态。 The city is under attack（＝is being attacked）at the mment.   目前这个城市正受到进攻。  The telephne is in use（＝is being used）nw.  电话正在使用中。
Whlie-class
In the wetland f my hmetwn, there are many different kinds f animals, including wild birds, fish, snakes, insects and s n. When I was in primary schl, I ften went there with my friends t watch the birds and study them. That was an interesting place fr all f us. But things have begun t change in recent years. Small birds _________________ (catch) with nets. Wild ducks _______________ (sell) at fd markets. Fish and snakes ___________________ (kill) fr fd in restaurants. And even wrse, the wetland ___________________ (destry). Sme parts __________________ (cver) with new huses. Yu can see rubbish everywhere. The wetland ____________________ (pllute) seriusly every day. I am very wrried abut it. What can we d?
Finish the fllwing passage with the present cntinuus passive vice f the verbs in brackets.
is being plluted
are being caught
are being sld
are being killed
is being destryed
are being cvered
Hell, everyne! I've just cme back frm a wnderful trip t Tibet. It was s beautiful there that______.The scenery was s impressive and the air was s fresh and clean._________. Hwever, _______. Cans, _________ as they pass thrugh Tibet. I wrry abut the effect this will have n the lcal shuld all think abut this. A. Visitrs are being tld t pay mre attentin t prtecting the envirnment. B. this beautiful cuntryside is being spiled by careless visitrs C. paper and plastic bags are still being thrwn away by many tur grups D. Hw can we make visitrs mre aware f the damage that is being dne t the envirnment? E. I felt I was in a fairyland(仙境)
Cmplete the speech with the crrect sentences r clauses. Then discuss pssible slutins in grups.
巧学助记主动语态变被动语态的原则: “三变”原则: 原主变为by短语 原宾变为现主语 谓语主动变被动。“三不变”原则: 原句意思不变;原句时态不变 原句主谓宾以外成分不变。