资源简介

(共15张PPT)
Period4
Discovering Useful Structures
Unit 2 Wildlife Protection
英语
① To have a good understanding of the structure of the present continuous passive voice and its function.
② To master the usage of the present continuous passive voice through self-study and practice.
③ To use the present continuous passive voice flexibly in the real context.
Studying objectives:
Key points：
1. To help students learn the structure of the present continuous passive voice.
2. To lead students to appreciate the functions of the present continuous passive voice.
3. To design specific situations for students to make use of the present continuous passive voice.
Difficult points：
How to use the present continuous passive voice in real situations.
Studying key points and difficulties:
1.African elephants are being hunted.
→______________________________________
2.What is being done to help them
→_______________________________________
3.What measures are being taken to help them
→________________________________________
Differences：_______________________________
Lead-in
Change the present continuous passive voice into active voice and compare the differences in meaning.
所强调的重点（主语）不同。
Hunters are hunting African elephants.
What are people doing to help them
What measures are people taking to help them
濒危动物
猎人
事件
人们
措施
大家
Self-directed study
Please observe the example sentences and try to summarise the usages by referring to the dictionary or reference books.
Make a mark where you can’t understand.
10 minutes
Presentation
Activity 1　Summarise the structure of the present continuous passive voice.
肯定结构
否定结构
一般疑问结构
特殊疑问结构
be(am/is/are)＋being done
be(am/is/are)＋not＋being done
be(am/is/are)＋主语＋being done
特殊疑问词＋be(am/is/are)＋主语＋being done
Presentation
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:______________________________________________
有时可表示按计划或安排将要进行的一个被动动作。
表示此时此刻正在进行的被动动作。
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)。
这种用法常常带有赞扬或厌恶的感彩。
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，
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。
Presentation
Activity 3　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.
Presentation
Activity 4　Rewrite the sentences using the present continuous passive voice.
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.
→________________________________________________________________
A new area is being opened for the two baby elephants (by the zoo).
The patient is not being examined (by the doctors).
More funds are being raised for research into wildlife protection.
A new nature reserve is being set up for endangered animals in/by the city.
Today our writing task is being completed online.
Activity 5　Finish the following passage with the present continuous passive voice of the verbs in brackets.
Presentation
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
is being polluted
are being caught
are being sold
are being killed
is being destroyed
are being covered
Activity 6　Complete the following sentences with the present continuous passive voice.
Presentation
1．最近正在制订勘探南极的计划。
The plan to explore the South Pole ____________these days.
2．我们都知道我们的产品正受到进口产品的威胁。
We all know that our products __________________ by imported goods at present.
3．(人们)正在设计一个保护自然资源的项目。
A project about protecting the natural resources __________________.
4．这些孩子现在由一个慷慨的商人照顾着。
These children __________________ by a generous businessman now.
5．人们正在采取措施以确保野生生物的栖息地得到良好保护。
Measures __________________ to make sure the wildlife habitats are well protected.
are being looked after
are being taken
is being made
are being threatened
is being designed
Summary
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。
Summary
Period 4　Discovering Useful Structures
The present continuous passive voice
Ⅰ.Structure
Ⅱ.Function
肯定结构 be(am/is/are)+being done
否定结构 be(am/is/are)+not+being done
一般疑问结构 be(am/is/are)+主语+being done
特殊疑问结构 特殊疑问词+be(am/is/are)+主语+being done
Homework
Finish the Finish the exercises.
Thank you !

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