UNIT 2Discovering Useful Structures（ppt课件）-2022新人教版（2019）《高中英语》必修第二册.pptx

1、 Learn to know the structure of present continuous passive voice.Learn to use present continuous passive voice to describe the ongoing events.Learn to use present continuous passive voice to describe the endangered animals conditions and measures taken to help them.nHave you still remembered the str

2、ucture of present continuous tense?nHave you still remembered the use of present continuous tense?present continuous tenseam/is/are doingWe are doing many things to protect the animals.We are seeing the Tibetan antelopes next week.We are observing the Tibetan antelopes these days.We are doing many t

3、hings to protect the animals.We are seeing the Tibetan antelopes next week.We are observing the Tibetan antelopes these days.something has not stoppedsomething will do in plansomething people do in a period of timethe use of present continuous tenseTranslate the following sentences.1.我们现在正在办公室开会。我们现

4、在正在办公室开会。We are having a meeting in the office now.2.这些日子我一直在思考这个问题。这些日子我一直在思考这个问题。Im thinking of the question these days.3.下周二我的朋友将在机场为我送行。下周二我的朋友将在机场为我送行。My friend is seeing me off next Tuesday.nLearn to know the structure of present continuous passive voiceUnderline the present continuous passive

5、 voice in the sentences and discuss its function.African elephants are being hunted.What is being done to help them?What measures are being taken to help them?am/is/are+being+P.PFind more sentences with the same verb form in this unit.They are being hunted,illegally,for their valuable fur.Much is be

6、ing done to protect wildlife.the use of present continuous passive voicePresent continuous passive voice is used in the same conditions where present continuous tense is used.But it express a passive voice.They are being hunted,illegally,for their valuable fur.People are hunting Tibetan antelopes,il

7、legally,for their valuable fur.The two sentences are telling the same thing but in two different ways.现在进行时的被动语态现在进行时的被动语态现在进行时的被动语态的结构现在进行时的被动语态的结构肯定式：肯定式：am/is/are+being+过去分词过去分词否定式：否定式：am/is/are+not+being+过去分词过去分词一一般疑问式：般疑问式：Am/Is/Are+主语主语+being+动词的动词的过去分词过去分词现在进行时的被动语态的用法现在进行时的被动语态的用法 现在进行时的被动语态

8、强调主语是动作的承现在进行时的被动语态强调主语是动作的承受者，表示说话时正在进行着的被动动作、现受者，表示说话时正在进行着的被动动作、现阶段正在进行着的被动动作或将要发生的动作。阶段正在进行着的被动动作或将要发生的动作。eg The man is being questioned by the police now.Measures are being taken to protect those endangered animals.Am I being taken for a ride?【拓展拓展】现在现在进行时的被动语态与进行时的被动语态与always,constantly等等词连用时，

9、表示经常性的被动动作，此时往往词连用时，表示经常性的被动动作，此时往往带有赞赏、厌恶等感情色彩。带有赞赏、厌恶等感情色彩。eg Recently my daughter is always being praised by the teachers.To the teachers anger,the same mistakes are always being made by his students.nUse present continuous passive voice in proper formsnRead the background of each sentence carefu

10、lly to make sure whether it is proper to use present continuous tense.nAnalyze the relationship between the subject and its verb to decide whether it is proper to use passive voice.Choose the suitable verb forms to complete the sentences.1.Im(working/being worked)at home today because my office is(p

11、ainted/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)

12、?6.Its reported that living spaces for wildlife are(reduced/being reduced)due to the cutting of trees.n.鹿鹿n.袋鼠袋鼠vt.减少减少1.We are doing many things to protect the animals.Many things are being done to protect the animals.Change the sentences into their passive voice.2.We are seeing the Tibetan antelop

13、es next week.The Tibetan antelopes are being seen next week.3.We are observing the Tibetan antelopes these days.The Tibetan antelopes are being observed these days.Have you visited a wetland?What can you see in the wetland?Why should we set up the wetland?Liu Tao would like to express his concern ov

14、er the wetland in his hometown.Help him finish the 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 wit

15、h 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.n.昆虫昆虫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 p

16、arts _(cover)with new houses.You can see rubbish everywhere.The wetland _(pollute)seriously every day.I am very worried about it.What should we do?are being caughtare being soldare being killedis being destroyedare being coveredis being pollutedn.网网 Why does Lin Tao use present continuous passive vo

17、ice in the passage?In what conditions can we use present continuous passive voice when we are expressing our ideas?It is reported that living spaces for wildlife are being reduced due to the cutting of trees.reduce vt.to make something smaller or less in size,amount,or price 缩小缩小;减少减少;降低降低【归纳归纳】redu

18、cereduce.(from.)to.把把（从（从）减少到）减少到reduce.to sth./doing sth.使使陷入某种状况陷入某种状况/状态状态reduce.by.把把减少减少 reduce sb.to.降职降职eg My weight reduces when I stop eating sugar.It reduces the risks of heart disease.The new bridge should reduce travelling time(from 50 minutes)to 15 minutes.Costs on books have been reduc

19、ed by 20%over the past year.【语境应用语境应用】根据提示完成句子。根据提示完成句子。1)The number of the employees _ _ _ _(被削减了被削减了)40%in the last five months.2)The population here has _ _ _(减少到减少到)fifty thousand now.3)那个军官被降职成一名士兵。那个军官被降职成一名士兵。The officer was reduced to a soldier.has been reduced bybeen reducedto 【归纳归纳】due adj

20、.预定的预定的;到期的到期的 due to:because of 由于；由于；因为因为 预期做预期做某某事事,预定要做某事预定要做某事 be due to sth./sb.归因于某事归因于某事/某人某人;欠某人欠某人 be due for sth.应有某物应有某物;应得到某物应得到某物 【联想联想】表示表示“由于由于,因为因为”的短语还有的短语还有:because of,as a result of,thanks to,on account of,owing to等。等。【语境应用语境应用】单句语法填空。单句语法填空。1)The policeman said the accident last

21、 night was _ driving.警察说昨晚的事故是由于粗心驾驶造成的。警察说昨晚的事故是由于粗心驾驶造成的。2)His new book _ next year.他的新书预计明年出版。他的新书预计明年出版。due to carelessis due to be publishednUse present continuous passive voice to describe wildlife protection in your surroundingsnThink about the wildlife in your city.nFind out where the wildli

22、fe lives in your city and their living conditions.nFind out what people once did to the wildlife in the past.nFind out what people are doing to protect the wildlife.In groups,discuss the questions below.Prepare to give a presentation of your ideas to the class.What do you know is being done in your

23、neighbourhood to protect animals and plants?What suggestions do you have?n.临近的地方；临近的地方；街区街区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 the natural habitat for songbirds.C:Thats 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 themFinish the discuss in Activity 4.