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(共29张PPT)
高一—人教版必修二—英语—第二单元
Unit 2 Wildlife Protection
Lesson 4 Discovering Useful Structure
After this class, you will be able to:
know the structure of present continuous passive voice
(现在进行时的被动语态).
2. use present continuous passive voice to describe the ongoing events.
3. describe the measures that are being taken to help the endangered animals with present continuous passive voice and give your own suggestions on wildlife protection in your neighborhood.
Learning Objectives
Make a Guess
What animals are talked about
？
Part One - Warm up
Part One - Warm up
They can be seen in the snow-covered mountains.
They are being hunted illegally for their valuable fur.
They are being specially protected in Changtang National Nature Reserve.
Tibetan antelope
They were forced to move to higher mountain areas due to habitat loss to search for plants.
Much is being done to protect them and their habitat, especially in Sichuan Province.
They have been removed from the IUCN’s Red List of endangered animals.
giant pandas
Part One - Warm up
They are being hunted illegally for their valuable fur.
They are being specially protected inChangtang National Nature Reserve.
Much is being done to protect them and their habitat, especially in Sichuan Province.
Can you find out more examples with the same verb form in the reading text on P18
are being hunted
protected
is being done
Part Two - Form of Present Continuous Passive Voice
are being
Find more sentences with the same verb form in the reading passage.
They are being hunted illegally for their valuable fur.
They are being specially protected Changtang National Nature Reserve.
Much is being done to protect them and their habitat, especially in Sichuan Province.
They are being hunted, illegally, for their valuable fur.
Much is being done to protect wildlife.
Present Continuous Passive Voice
Form: is being done/ are being done
Part Two - Form of Present Continuous Passive Voice
are being caught
are being sold
are being killed
is being destroyed
are being covered
is being polluted
Part Two - Form of Present Continuous Passive Voice
1. What is happening to the small birds in the wetland
They are being caught with net.
2. What is happening to the wild ducks
They are being sold.
3. What is happening to the fish and snakes
They are being killed.
4. What is happening to the wetland
It is being polluted seriously every day.
Part Three- Meaning of Present Continuous Passive Voice
Present Continuous Voice
Meaning: the action is happening at the time of speaking
What do you know is being done in your neighbourhood to protect animals and plants What suggestions do you have
Activity 8
In groups，discuss the questions below. Prepare to give a presentation of your ideas to the class.
参考答案
A：What is being done in our neighbourhood to protect animals and plants
B：Well，the old trees in the park are being protected.
A：Oh yes. They are being protected not only because they are very old but also because they are the natural habitat for songbirds.
C：That’s right. Perhaps they could help protect the birds by making the roads around the park free from cars.
D：Yes，that would certainly help make the air cleaner for them...
单元语法
现在进行时的被动语态
1 构成
肯定式：主语+am/is /are+being done.
否定式：主语+am/is /are not+being done.
一般疑问式：Am /Is /Are+ 主语+being done
特殊疑问式：疑问词 +am/is/are+（主语+）being done
At present，lots of food，water，tents and medicine are being sent to the disaster-hit area.
目前，大量的食物、水、帐篷和药品正被送往灾区。［词汇复现］
What measures are being taken to protect the endangered animals
采取了什么措施来保护濒危动物？［词汇复现］
附：单元语法精讲精练
2 用法
（1）表示说话时正在进行的被动动作。
She is being examined by the doctor now. 她现在正在接受医生的检查。
（2）表示现阶段正在进行的被动动作，说话时不一定在进行。
A new gallery is being built. 一个新的画廊正在建造中。［词汇复现］
（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彩。
The girl is always being praised by her teachers. 这个女孩总是受到老师的表扬。
（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）。
Some classical music is being played by them next.
下面将由他们演奏一些古典音乐。［词汇复现］
3 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。
Mary，come here. You’re being wanted on the phone. （×）
Mary，come here. You’re wanted on the phone. （√）
玛丽，过来，有你的电话。
（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，build，make 等。
The meat is cooking. 肉正煮着。
（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。
The problem is under discussion now.
= The problem is being discussed now.
现在这个问题正在讨论中。
（4）因为被动语态的基本结构为 be done，不少学生误将现在进行时 的被动语态结构“am/is/are + being done”写成一般现在时的被动语态结构“am/is/are + done”。
Look! The road is built.（×）
Look! The road is being built.（√）
瞧，这条道路正在建设中。
The dinner is prepared by Christina.（×）
The dinner is being prepared by Christina.（√）
晚宴正由克里斯蒂娜准备着。
【学法点拨】
现在进行时的被动语态与现在分词的被动式 being done 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。
The man who is being surrounded by crowds is a famous architect.
=The man being surrounded by crowds is a famous architect.
被人群包围的那个人是一位著名的建筑师。［词汇复现］
【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。
① to be done →不定式的被动形式，表将来和被动
② to have been done →不定式完成式的被动形式，表完成和被动
③ being done →现在分词的被动形式，表进行和被动
④ having been done →现在分词完成式的被动形式，表完成和被动
He will take part in a conference to be held on Friday.
他将参加星期五举行的会议。［词汇复现］
The expert is proud to have been invited to attend the international activity.
专家为被邀请参加了这次国际活动而感到自豪。［词汇复现］
It is reported that the house being built is for those whose houses were destroyed in the disaster.
据报道，正在建造的房子是为那些在灾难中房屋被毁的人建造的。［词汇复现］
He is ashamed of having been defeated for many times.
他为多次被人击败而感到羞愧。
Ⅰ . 单句语法填空
（1） Look! The baby 　　　　 　 （take）care of by her aunt.
（2） A new house 　　　　 　 （decorate）outside our school at present.
（3） Now，good measures 　　　　 　 （take） to save the endangered animals by the government.
（4） Hi，I’m Alice. Look at this photo—a snowman 　　　　 　 （make）by me.
（5）［词汇复现］At present a new statue 　　　　 　 （carve）.
（6） Is the bridge 　　　　 　 （build）now
（7）［词汇复现］To our delight，many endangered species 　　　　 　 （protect）by the government now.
is being taken
is being decorated
are being taken
is being made
is being carved
being built
are being protected
（8）Many interesting experiments 　　　 　 　 （carry）out these days.
（9）Since your bike 　　　　 　 （fix），you can use mine.
（10）［词汇复现］Daisy has found that a lot of antelopes 　　　　 　 （hunt）and killed for the wool beneath their stomachs now.
（11）The new generation of computers，with artificial intelligence， 　　　　 　 （develop） and perfected now.
（12）—I don’t suppose the police know who did it.
— Well，surprisingly they do. A man has been arrested and 　　　　 　 （question）now.
（13）—Have you handed in your schoolwork yet
— Yes，I have. I guess it 　　　　 　 （grade） now.
（14）—What’s that noise
— Oh，I forgot to tell you. The new machine 　　　　 　 （test）.
are being carried
is being fixed
are being hunted
are being developed
is being questioned
is being graded
is being tested
Ⅱ . 完成句子
（1）［词汇复现］The sports meeting 　　　　 　　　（正在被举办）in the new stadium.
（2）［词汇复现］The giant machine 　　　　 　 　　　　　（被拆卸）at the moment and it will be set up in the new workshop in the near future.
（3） The classroom 　　　　　　　　　　 （正被装饰）with balloons and flowers right now and the students are preparing for the New Year party.
（4） The window of our classroom 　　　　 　　　　 　　　　　（经常被打破）.
（5） The sum these computers will cost us 　　　　 　　　　　　　　（正在计算中）.
（6）With the population increasing，more land 　　　　　　　　（需要）.
is being held
is being taken apart
is being decorated
is frequently being broken
is being calculated
is needed
Ⅲ . 句型转换
（1） Please tell me something about the meeting being held now.
→ Please tell me something about the meeting 　　　　　　　　 .
（2） I find the national flag is being raised.
→ I find the national flag 　　　　　　　.
（3） The computer is in use now.
→ The computer 　　　　　　 now.
（4） These high-tech products are on display these days.
→ These high-tech products are 　　　　　　 　　 these days.
（5） The castle is under attack at the moment.
→ The castle is 　　　　　　　　 at the moment.
which is being held now
being raised
is being used
being displayed
being attacked
Language points
核心词汇
教材原句p. 18 It is reported that living spaces for wildlife are being reduced due to the cutting of trees. 据报道， 由于砍伐树木，野生动物的生存空间正在减少。
1 reduce vt. 减少，缩小，降低
This drug can reduce the death rate of heart attacks.
这种药可以降低心脏病发作的死亡率。［词汇复现］
All the shirts were reduced to ＄10. 所有衬衫都减价至 10 美元。
Output has been reduced by around 30 percent due to the bad weather.
由于恶劣的天气，产量已减少了大约 30%。［词汇复现］
题组练·领悟方法
【归纳拓展】
The number of the species has increased by 10% thanks to the measures taken by the government.
多亏政府所采取的措施，物种的数量增加了10%。［词汇复现］
【词语积累】
reduction n. 减少　
［同］decrease v. 减少
［反］increase v. 增加；增长
单句语法填空
（1）［ 词汇复现］The camera was reduced 　　　　 　 half of the original price.
（2） If their marketing plans succeed，they will increase their sales 　　　　 　 20 percent.
（3） The 　　　　 　（reduce）of unemployment should be the most important thing.
完成句子
（4） The number of the bikes they produce 　　　　　　　　　（已经减少到） 100，000 this year.
（5） What they earn 　　　　　　　　 　　　（已减少了）30% in the last three months.
（6） The number of the workers in this company 　　　　　　　　　　（已经减少到）120.
to
by
reduction
has reduced to
has been reduced by
has been reduced to
教材原句p. 18 It is reported that living spaces for wildlife are being reduced due to the cutting of trees. 据报道， 由于砍伐树木，野生动物的生存空间正在减少。
2 due to 由于，因为
Many crops were damaged due to the flood. 洪水毁坏了许多庄稼。［词汇复现］
Your headache is due to stress. 你的头痛是由压力造成的。［词汇复现］
【词语辨析】due to，owing to，because of与 thanks to
Because of /Owing to the snow，the flight has been cancelled.
由于下雪，航班已经取消了。（作状语）［词汇复现］
His death was owing to an accident. 他的死是事故造成的。（作表语）
It is mainly because of my fault.这主要是由于我的过错。（作表语）
Thanks to your help，we were successful. 多亏了你的帮助，我们得以成功。（作状语）
【归纳拓展】
be due to do sth. 预计要做某事
be due for 应得到……
The boat is due to arrive at 12 o’clock. 船预计在 12 点钟到达。
She’s due for promotion soon. 她很快该晋升了。［词汇复现］
完成句子
（1） His mistake was 　　　　 　 （因为）lack of experience.
（2） David said that it was 　　　　 　 （由于） his strong interest in computers that he chose the course.
（3） The next meeting 　　　　 　 （预计召开） in three months.
（4）［词汇复现］Owing to lack of funds，the project will not continue next year.
=The project will not continue next year 　　　　 　 lack of funds.
（5） The train 　　　　 　 （预计）leave for Shanghai at 8.
（6）［词汇复现］ 　　　　 　 （房租到期）tomorrow.
单句语法填空
（7） The boat is due 　　　　 （arrive）at 12.
（8）He is due 　　　　 praise because of his heroic deeds.
due to/owing to
due to/because of /owing to
is due to be held
due to/because of/owing to
is due to
The rent is due
to arrive
for
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