人教版 (2019)必修 第二册Unit 2 Wildlife protection导学案及答案

2019新人教高中英语必修二

Unit2 Discovering Useful Structures公开课学案

学习目标：

1. Learn the structure of the present continuous passive voice and its functions.
2. Learn to change the sentences with the present continuous tense into the sentences with the present continuous passive voice.
3. Learn to write sentences with the present continuous tense flexibly according to the context.

重点难点：

1. Learn the structure of the present continuous passive voice and its functions.
2. Learn to change the sentences with the present continuous tense into the sentences with the present continuous passive voice.

3. Learn to write sentences with the present continuous tense flexibly according to the context.

学习过程：

Part Ⅰ Observation and analysis

Pay attention to the underlined parts:the present continuous passive voice,change them into active voice and compare the differences in meaning.

1.African elephants are being hunted.

→_______________________________________________________

2.What is being done to help them?

→_______________________________________________________

3.What measures are being taken to help them?

→_______________________________________________________

Differences:_______________________________________________

Part Ⅱ　The structures and the functions

Activity 1　Summarize the structures of the present continuous passive voice.

Activity 2　Observe the following sentences and figure out the functions of the present continuous passive voice.

1.My sister is now being interviewed. 

Function:______________________________________

2.Many interesting experiments are being carried out these days. 

Function:______________________________________

3.He is always being praised by the leader. 

Function:______________________________________

4.A celebration is being held this weekend for his success. 

Function:______________________________________

被动语态的使用情境:不知道或者不需要提及动作的发出者;强调动作的承受者。

Part Ⅲ　Consolidation

Activity 1　Choose the suitable verb forms to complete the sentences.

1.I’m (working/being worked) at home today because my office is (painted/being painted).

2.The alarming report is (written/being written).It will be finished soon.

3.What part of the city is (attacked/being attacked) now?

4.Right now,the deer are (watched/being watched) over by many volunteers.

5.Who is (hunting/being hunted) the kangaroos?Where are they (hunted/being hunted)?

6.It is reported that living spaces for wildlife are (reduced/being reduced) due to the cutting of trees.

Activity 2　Rewrite the sentences using the present continuous passive voice.(Workbook P68 Using Structures Exercise 2)

1.The zoo is opening a new area for the two baby elephants.

→_______________________________________________

2.The doctors are not examining the patient.

→_______________________________________________

3.They are raising more funds for research into wildlife protection.

→_______________________________________________

4.The city is setting up a new nature reserve for endangered animals.

→_______________________________________________

5.Today we are completing our writing task online.

→________________________________________________

Activity 3　Liu Tao would like to express his concern over the wetland in his hometown.Help him finish the following passage with the present continuous passive voice of the verbs in brackets.

In the wetland of my hometown,there are many different kinds of animals,including wild birds,fish,snakes,insects and so on.When I was in primary school,I often went there with my friends to watch the birds and study them.That was an interesting place for all of us.But things have begun to change in recent years.Small birds 　　　　　　　　(catch) with nets.Wild ducks 　　　　　　　　(sell) at food markets.Fish and snakes 　　　　　　　　(kill) for food in restaurants.And even worse,the wetland 　　　　　　　　(destroy).Some parts 　　　　　　　　(cover) with new houses.You can see rubbish everywhere.The wetland 　　　　　　　　(pollute) seriously every day.I am very worried about it.What can we do? 

Activity 4　Complete the speech with the correct sentences or clauses.Then discuss possible solutions in groups.(Workbook P69 Using Structures Exercise 5)

Hello,everyone! I’ve just come back from a wonderful trip to Tibet.It was so beautiful there that 　　　　　.The scenery was so impressive and the air was so fresh and clean.　　　　　 However,　　　　　.Cans,　　　　　 as they pass through Tibet.I worry about the effect this will have on the local wildlife.　　　　　We should all think about this. 

A.Visitors are being told to pay more attention to protecting the environment.

B.this beautiful countryside is being spoiled by careless visitors

C.paper and plastic bags are still being thrown away by many tour groups

D.How can we make visitors more aware of the damage that is being done to the environment?

E.I felt I was in a fairyland (仙境)

Part Ⅳ　Summary

一、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。

二、难点

1.像take care of, look after, talk about, think of等动词与介词构成的短语用于现在进行时的被动语态时, 其中的介词不可省略。

The ways to stop illegally hunting are being talked about. 阻止非法捕猎的方法正在研讨中。

2. “be(am/is/are)+under/in+n. ”有时可相当于现在进行时的被动语态。

Many questions are under discussion. =Many questions are being discussed.

许多问题正在被讨论。

3. 有时表“状态, 心理活动, 情感”等的动词, 常用在一般

现在时的被动语态表示“正在进行”。

The runaway of the traffic accident is wanted by the police. 警方正在通缉交通事故的逃逸者。

The plan is being discussed at the meeting now. 现在这个计划正在讨论过程中。

A new law is being made to prevent endangered animals from extinction.

为了阻止濒危动物的灭绝新的法律正在制定中。

Workers are cutting down some trees in the park.

→Some trees are being cut down by workers in the park. (被动语态)

→Where are some trees being cut down by workers? (特殊疑问句)

PartⅤ Practice

1.Complete the sentences with the correct forms of the given verbs.(Workbook P68 Using Structures Exercise 1)

（1）A new library 　　　　　　　　(build)in our school.It will open next year. 

（2）Conservation programmes for wild animals 　　　　　　　　(discuss)in Australia now. 

（3）What 　　　　　　　　(do) in your town to protect local wildlife? 

（4）Don’t worry.Measures 　　　　　　　　(take) to stop such a thing from happening again. 

（5）I 　　　　　　　　(tell) that my ID and password are not working.What should I do now? 

（6）Mum,my computer 　　　　　　　　(fix).Can I use yours for a while? 

（7）It is believed that many plant species 　　　　　　　　(threaten) with extinction. 

2.Read and complete the passage about wildlife protection with the correct verb forms in brackets.(Workbook P69 Using Structures Exercise 4)

The balance of nature on our planet 　　　　　　　　(threaten)as a large number of species_____________ (drive)to extinction.Some scientists predict that half of all our plants and animals will be extinct by 2100.The question is why these species 　　　　　　　　(endanger).One of the main reasons is loss of habitat.Animal habitats 　　　　　　　　(destroy) as humans search for more natural resources to consume(消费).More land 　　　　　　　　(also use) for growing crops or keeping livestock(家畜).In addition,massive amounts of waste 　　　　　　　　(produce) by humans,which are polluting animal habitats.Harmful chemicals 　　　　　　　　(create) by human activities are being released into the air,water,and soil.The whole of nature 　　　　　　　　(affect) by human beings. 

However,much has been done and 　　　　　　　　(still do) to save endangered species.Many programmes 　　　　　　　　(design) to preserve the populations of endangered species.In my opinion,there is still hope that humans can live in harmony with all things on the earth. 

3.Compete the sentences.

（1）关于在哪儿建厂的问题正在被讨论。

The question about where is the factory going to be built ________________ now.

（2）正在设计一个保护自然资源的项目。

A project about protecting the natural resources ________________．

（3）受到攻击时应保持冷静。

You should stay cool when you __________________．

（4）我感到很迷惑，我们商店的商品老是被偷。

I feel very puzzled that the goods in our shop __________________．

（5）一句多译

这条路正在被修建。

→_____________________________________________________(construction)

→_____________________________________________________(construct)

参考答案:

Part Ⅰ

1.Hunters are hunting African elephants.

2.What are people doing to help them?

3.What measures are people taking to help them?

Differences:所强调的重点(主语)不同。

Part Ⅱ

Activity 1

Activity 2

1.表示此时此刻正在进行的被动动作。

2.表示现阶段正在进行的被动动作(该动作在说话的瞬间未必正在进行)。

3.表示一种经常性的被动行为,常和always,constantly 等表示频度的副词连用,这种用法常常带有赞扬或厌恶的感情色彩。

4.有时可表示按计划或安排将要进行的一个被动动作。

Part Ⅲ

Activity 1

1.working;being painted　2.being written　3.being attacked　4.being watched　5.hunting;being hunted

6.being reduced

Activity 2

1.A new area is being opened for the two baby elephants (by the zoo).

2.The patient is not being examined (by the doctors).

3.More funds are being raised for research into wildlife protection.

4.A new nature reserve is being set up for endangered animals in/by the city.

5.Today our writing task is being completed online.

Activity 3

are being caught;are being sold;are being killed;is being destroyed;are being covered;is being polluted

Activity 4

E;A;B;C;D

PartⅤ

1.（1）is being built　（2）are being discussed　（3）is being done　（4）are being taken　（5）am being told　（6）is being fixed　（7）are being threatened

2.is being threatened;are being driven;are being endangered;are being destroyed;is also being used;are being produced;created;is being affected;is still being done;are being designed

3.（1）is being discussed　（2）is being designed  （3）are being attacked　（4） are always being stolen（5）The road is under construction now.  The road is being constructed now.