Unit 6 Developing ideas&Presentingideas ppt课件-（2019）新外研版高中英语必修第二册.pptx

1、高中英语 必修第二册 UNIT 6 Earth firstUNIT 6 Earth firstDeveloping ideas , Presenting ideas & ReflectionDeveloping ideas Look at the questions about “green living” and tick your answers.1Which shopping bag is more environmentally friendly? A plastic bag. A paper bag. Neither of these.2What should you do to s

2、ave energy when leaving your home? Turn off a device. Unplug a device. Neither of these.3What food is better for the environment? Food produced near to where you live. Food produced far from where you live. It depends.4Which uses less water? Taking a bath. Taking a shower. It depends.Now work in gro

3、ups and see if other people share your ideas.Read the four subheadings in the passage and decide if they are true or false. Then read the passage and check your answers. Learning to learnAs subheadings expand on the main heading or title，they can be slightly longer than the main heading. Although no

4、t every paragraph needs a subheading，they can be skimmed to give the reader an overall understanding of the content of a text.Read the effects and complete the causes of these according to the passage.1Making a paper bag uses more energy and water than making a plastic bag. It also produces more gre

5、enhouse gases.Paper bags are not good for the environment.234Turning off a device wont stop it from using power.Eating local food isnt always better for the environment.Its not always better to take a shower than a bath.Devices turned off go into stand-by mode and still use power.Local produce somet

6、imes might use more energy and produce more greenhouse gases than produce grown a long way awayeven taking into account its transport.If you spend more than eight minutes in a shower，youll use as much water as in a bathabout 50 litres of water.Think & Share1Which of the “green truths” surprises you

7、most? Give your reasons.2Are you aware of any other “green truths” that are not true? Share them with the class.3How “green” are you? Share your “green actions” with the class.4What can you do to become “greener”?When you turn off a device，it stops using power. Usually I just turn off my television

8、before going out，thinking it is a safe and green way. I dont know its still a waste of energy.Bike-sharing is a green method of transportation and provides a user-friendly experience. However，it causes the energy to be wasted if the bikes are thrown away by the roadside.I usually try to save energy

9、and water in my daily life. For example，I always turn off the lights when I leave a room. I walk or ride a bike instead of taking a bus or a taxi. I take a cloth bag when I go shopping.I can stop using the things that can be used only once. I can unplug the TV set before I go out. I can stop people

10、from producing power from coal.Work in groups. Give a talk about one of the “green truths” in the passage. 1Use these questions to help plan your talk.Which“green truth”are you going to talk about?Why do people believe it is “green”?Why is it not completely true?What can you do to become “greener”?2

11、Organise your talk following the steps below.Start your talk by stating the topic.Describe your chosen“green truth”in more detail.Explain why it is not completely“green”.End your talk by encouraging your audience to become “greener”.3Give your talk to the class.Im going to talk about one of the “gre

12、en truths”Paper shopping bags are better than plastic ones. As we all know，plastic bags cause litter and are a danger to wild animals，which mistake them for food. It takes hundreds of years for plastic to break down，but much less time for paper. Because of this，we think paper bags are the better env

13、ironmental choice. However，making a paper bag uses four times as much energy as making a plastic bag and up to three times the amount of water. The process also produces more greenhouse gases. In fact，both kinds of bags are bad for the environment. So，why not take a reusable bag to become “greener”

14、when going shopping?Read the letter and answer the questions.Writing a persuasive letterDear Friends，We are writing this letter to call on everyone to take part in the Clear Your Plate campaign. It urges people to save food by not wasting anything on the dining table. You may not know over 30% of th

15、e worlds food is wasted，while many people in poor areas do not have enough to eat. In order to save food，we propose：1Do not order more than you need in the school canteen.2Order less and take leftover food home when dining in restaurants.3Call on family members and friends to take part in the campai

16、gn.Reducing daily food waste by just 5% could save millions of people from starvation. Lets start doing what we can to make the world a greener，cleaner place!With best wishes，Class 81What is the purpose of the letter?2What is the existing problem?3What are the proposed actions from Class 8?The purpo

17、se of this letter is to call on everyone to take part in the Clear Your Plate campaign.Over 30% of the worlds food is wasted，while many people in poor areas do not have enough to eat.Do not order more than you need in the school canteen；order less and take leftover food home when dining in restauran

18、ts；call on family members and friends to take part in the campaign.Problem：Cause（s）：Solution（s）：Now write a persuasive letter. Use the expressions in the box tohelp you.Work in groups. Discuss another environmental issue about whichto write a persuasive letter and make notes.Share your letter with t

19、he class.Useful expressions We are writing this letter to raise your awareness of.We are concerned that.We would like to suggest.We hope that you will consider.One of the reasons for this is.In order to improve the situation，we should.Dear Friends，We are writing this letter to raise your awareness o

20、f the need to protect our planet. You can help simply by participating in the No Bottled Water campaign. People tend to think bottled water is cleaner and more convenient. However，they may not know that according to scientific research，millions of tons of plastic is used worldwide to make water bott

21、les each year. The plastic can take hundreds of years to break down. If you are worried about the effects of bottled water on the Earth，we would like to suggest you take the following steps：1 Carry your water in a sustainable，reusable bottle. In this way，you dont need to buy bottled water.2 If you h

22、ave to purchase a plastic bottled beverage，recycle the bottle after use.3 Call on your family members and friends to take part in this campaign.Everyone is responsible for making our planet cleaner and better by doing what we can. Lets start NOW.With best wishes，Class 3/10Presenting ideasWork in gro

23、ups. Look at the three items that contribute to a carbon footprint. Add any more you can think of.rubbish，smoking，printingCreate a carbon footprint survey. Think of two questions and possible answers for each topic. Give each answer a score from 1（a low carbon footprint）to 3（a high carbon footprint）

24、.Carry out the survey and use the results to come up with ways to reduce carbon footprint.Carbon footprint survey1How often do you walk，cycle or take public transport to school?Never（3） One to three times a week（2） Almost every day（1） . Useful expressions The average score of our group is.The result

25、s show that.The biggest problem is.Were glad to see that.In order to.，we suggest.Report the results of your survey and your ideas to the class. Use the expressions in the box to help you.Language points高中英语 必修第二册 UNIT 6 Earth firstp.68 . and the majority of us take steps to save energy and reduce wa

26、ste and pollution.1 majority n. 多数，大多数（人或物）the majority of 大多数in a / the majority 占大多数The majority of the employees have university degrees.大部分雇员都有大学文凭。In the nursing profession，women are in a/the majority.女性在护理行业中占大多数。高中英语 必修第二册 UNIT 6 Earth first【学法点拨学法点拨】（1）The majority+ 单数 / 复数谓语The majority was

27、/were in favour of banning smoking.大多数人支持禁烟。（2） 复数名词+复数谓语The majority of + 不可数名词+单数谓语【单词积累单词积累】（1）major adj. 主要的，重要的n. 主修科目，专业v. 主修 major in 主修（2）minor adj. 小的，不很重要的 minority n. 少数，少数派高中英语 必修第二册 UNIT 6 Earth first完成句子完成句子(1)The agreement seems to be impossible because _（大多数成员）are against it.(2)Only（

28、少数的）people in that city do not have a car while the people taking the subway to work are （占大多数）.单句语法填空单句语法填空(3)To my surprise，the majority of the students （be）for his proposal.(4)One-third of the country （be）covered with trees and the majority of the citizens （be）black people.the majority of the mem

29、bersa minority ofin the/ a majorityareisare高中英语 必修第二册 UNIT 6 Earth first2 take steps to do sth. 采取措施做某事We are taking steps to prevent pollution.我们正在采取措施防止污染。【归纳拓展归纳拓展】（1） take measures to do sth. 采取措施做某事 take action to do sth. 采取行动做某事（2） step up 使增加，使加快；走上前去 step by step 逐步地 out of step 不合拍，不一致 mind

30、/watch your step 走路小心；言行小心谨慎单句语法填空单句语法填空(1)The wild population of koalas is in danger of dying out，so we should take steps _（protect）them.(2) It is time for us to take measures _ （protect）the environment.(3) Jack stepped _ his pace because he didnt want to be late again.to protectto protectup高中英语 必修

31、第二册 UNIT 6 Earth first教材原句p.68 Plastic bags cause litter and are a danger to wild animals， which mistake them for food. mistake.for.把错当成I think you must be mistaking me for someone else.我想你准是认错人了。【归纳拓展归纳拓展】（1）by mistake 错误地，无意地make a mistake 犯错admit ones mistake 承认自己的错误（2）be mistaken about. 误解；对持有错误

32、的见解高中英语 必修第二册 UNIT 6 Earth first单句语法填空单句语法填空(1) A woman mistook him a well-known actor，and asked him for his autograph（亲笔签名）.(2)Tom must have taken your dictionary mistake.(3)Dont worry. We all make （mistake）.(4)Unfortunately，I was （mistake）about how much it would cost.完成句子完成句子(5) I took your bag in

33、stead of mine （错误地）.forbymistakesmistakenby mistake高中英语 必修第二册 UNIT 6 Earth firstp.68 It takes hundreds of years for plastic to break down，but much less time for paper. break down （使）分解；出故障；失败；垮掉；消除Guess the meaning of “break down”.Food is broken down in the stomach. Our car broke down and we had to

34、push it off the road.Talks with business leaders broke down last night.Her health broke down under the pressure of work. It takes a long time to break down prejudices.【归纳拓展归纳拓展】break up 破碎；解散 break into 强行闯入；突然起来break in 破门而入；打断谈话 break away（from）脱离；逃脱break through 突破 break off 中断；折断break out（战争、火灾等

35、）突然发生，爆发分解分解抛锚，出故障抛锚，出故障失败失败垮掉垮掉消除消除高中英语 必修第二册 UNIT 6 Earth first完成句子完成句子(1) He had to pause from time to time to wipe the sweat from his forehead，because the air-conditioning system （发生故障）.(2)The river was covered with ice，which could sometimes （破裂）without warning.(3)A big fire （突然发生）last night and

36、 its cause is being looked into.(4)When he got home，he found his house （被闯入）.(5)Burglars （窃贼）（强行进入）through the bedroom window. broke down break upbroke outbroke intobroke in高中英语 必修第二册 UNIT 6 Earth firstp.68 However， making a paper bag uses four times as much energy as making a plastic bag and up to

37、three times the amount of water . 1 动名词（短语）作主语（1）动名词（短语）作主语可直接位于句首，也可用 it 作形式主语，而将动名词（短语）后置。单个的动名词（短语）作主语时，谓语动词用单数形式。Saying is one thing，and doing is another.说是一回事，而做是另一回事。Staring at someone is impolite. 盯着人看是不礼貌的。Its rather tiring looking after the kids. 照看孩子相当累人。高中英语 必修第二册 UNIT 6 Earth first（2）常用动

38、名词（短语）作主语的句式：It is no use/no good doing sth. 做某事是没有用的。It is a waste of time doing sth. 做某事是浪费时间。It is no fun doing sth. 做某事没有乐趣。Its no use crying over spilt milk. 覆水难收。It is a waste of time discussing such matters.讨论这样的事情是浪费时间。【学法点拨学法点拨】动名词和动词不定式都可以作主语。动名词作主语，表示一般或抽象的多次性的行为；动词不定式作主语往往表示具体的或一次性的动作。高中

39、英语 必修第二册 UNIT 6 Earth first2 倍数表达法常用的几种形式：（1）倍数 + as + 形容词 / 副词的原级 + as + 其他（2）倍数 + 形容词 / 副词的比较级 + than + 其他（3）倍数 + the + size/height/weight/length/width/depth.+ of + 其他（4）倍数 + what 从句When you study the local map，you will find this town is three times as big as that one.= ，you will find this town is

40、 three times bigger than that one.= ，you will find this town is three times the size of that one.【学法点拨学法点拨】（1）上述结构中的“倍数”部分也可用分数、百分数代替。（2）表示两倍时，一般用 twice/double；times 表示“倍数”时，一般用于表示三倍或三倍以上。高中英语 必修第二册 UNIT 6 Earth first单句语法填空单句语法填空(1)Peters jacket looked just the same as Jacks，but it cost twice much a

41、s his.(2) This department is twice （big）than that one.(3) Our manager presented a report three times （long）of mine.一句多译一句多译这条路的长度是三年前的四倍。(4) The road is four times it was three years ago.(5) The road is four times it was three years ago.(6) The road is four times _ it was three years ago.(7)The leng

42、th of the road is four times three years ago.asbiggerlength as long as the length of whatwhat it was longer than高中英语 必修第二册 UNIT 6 Earth firstp.68 However，making a paper bag uses four times as much energy as making a plastic bag and up to three times the amount of water . amount n.数量，数额A large amount

43、 of = large amounts ofA small amount of = small amounts ofThe task will take a large amount of time and energy.那项工作将花费大量的时间和精力。They didnt deliver the right amount of sand.他们运来的沙子数量不对。【误区警示】A large /small amount of +不可数名词+单数谓语Large / small amounts of +怒可数名词+复数名词高中英语 必修第二册 UNIT 6 Earth first单句语法填空单句语法

44、填空(1)A large amount of money （spend）building more modern kindergartens so far this year.(2)Large amounts of money （waste）buying useless things every year.(3) With more forests being destroyed，a large amount of good earth （be）being washed away each year.完成句子完成句子(4)He wasted （大量时间）playing computer gam

45、es. are wasted is has been spent a large amount of time/large amounts of time高中英语 必修第二册 UNIT 6 Earth firstp.69 To make sure your appliance is in fact off, remove the plug from its power supply. remove v. 移走，搬走，去掉；消除，除去；免除的职务，开除Removefrom把从搬走/移开Remove sb. from sth 免除某人的职务As soon as the cake is done，r

46、emove it from the oven.蛋糕一烤好，就把它从烤箱里移出来。She has been removed from her position as a director.她已经被免去了董事职位Illegally parked vehicles will be removed.非法停放的车辆将被拖走。remove ones doubt/trouble 消除某人的疑虑 / 烦恼。高中英语 必修第二册 UNIT 6 Earth first单句语法填空单句语法填空(1)To our amazement，the official was removed office.(2)Youd be

47、tter have the old furniture （remove）.(3)Once formed，the bad habits are hard （remove）.完成句子完成句子(4) Youd better perform well to （消除他的疑虑）.(5)He （被开除了）the post because he broke the rules and regulations of the company by design.fromremovedto be removedto be removedwas removed from高中英语 必修第二册 UNIT 6 Earth

48、firstp.69 It is the production of food，not its transport， that uses most of the energy and produces most of the greenhouse gases . 强调句型（1）强调句型的基本结构：It is/was + 被强调部分 + that + 其他部分. 该句型可强调主语、宾语、状语等，但不能强调谓语。（2）一般疑问句：Is/Was it + 被强调部分 + that + 其他部分 ?特殊疑问句：疑问词 + is/was + it + that + 其他部分 ?Was it her fai

49、ling her exam that made her parents unhappy?是她考试不及格使她的父母不高兴吗？When was it that she changed her mind?她是什么时候改变主意的？高中英语 必修第二册 UNIT 6 Earth first（3）not.until. 的强调句型：It is/was not until.that + 其他部分 .I didnt realize she was a famous film star until she took off her dark glasses. It was not until she took o

50、ff her dark glasses that I realized she was a famous film star.直到她摘下墨镜，我才意识到她是一位著名的电影明星。【误区警示误区警示】（1）强调句型中的 it 不能用其他词代替。（2）被强调部分指人时，可以用 who 代替 that，其他情况一律用that。（3）用 is 还是 was 要根据原句的时态而定：属于现在或将来时间范畴的所有时态用 is；属于过去时间范畴的所有时态用 was。【学法点拨学法点拨】判断句子是不是强调句型的方法：去掉 it is/was 与 that/who，剩余部分若结构完整、句意明确，则为强调句型，否则就