2021版外研版必修二英语Unit 6 Earth first Period 4 Developing ideas学案.docx

1、Period 4 Developing ideas 学习目标 1.To know the features of newspaper editorials(报刊社论). 2.To express students opinions about how to become greener. 3.To raise students awareness of living a green life. 课堂探究 Step 1:Lead-in Look at the questions about “green living” and tick your answers. 1.Which shoppin

2、g bag is more environmentally friendly? A.A plastic bag. B.A paper bag. C.Neither of these. 2.What should you do to save energy when leaving your home? A.Turn off a device. B.Unplug a device. C.Neither of these. 3.What food is better for the environment? A.Food produced near to where you live. B.Foo

3、d produced far from where you live. C.It depends. 4.Which uses less water? A.Taking a bath. B.Taking a shower. C.It depends. Step 2:Read for main information Read the four subheadings in the passage and decide if they are true or false. Subheading 1:Paper shopping bags are better than plastic ones.(

4、 ) Subheading 2:When you turn off a device,it stops using power.( ) Subheading 3:Eating local food is good for the environment.( ) Subheading 4:Its better to take a shower than a bath.( ) Step 3:Read for detailed information Read paragraph by paragraph,finish the relevant tasks. Task 1:Read the pass

5、age again and finish the following table Truths Suggestions 1.Making a paper bag uses more energy and water than making a plastic bag.It also produces more greenhouse gases. Take a reusable bag with you when you go shopping. 2. 3. No suggestion 4. Task 2:Summarize the passage and pay attention to th

6、e sentences of “really green living” Most of us are 1 (awareness) that we must take care of the environment,and the majority of us take steps 2 (save) energy and reduce waste and pollution.But in fact,some long-held common sense turns out only half true,or even 3 (complete) false.For example,people

7、think paper bags are 4 (good) than plastic bags as they are easier to break down than the plastic 5 (one).The process of making paper bags, 6 ,is more energy consuming and water wasting.So,take a reusable bag with you when shopping.Besides,remove the plug from its power supply, 7 the stand-by mode s

8、till use power.Eating local food isnt necessarily good for the environment,even taking transportation 8 account.Some take it for granted 9 a shower consumes less water than a bath.But that depends 10 how long you spend in a shower.The best policy is to keep your shower as short as possible. 11 (envi

9、ronment) awareness is now part of daily life.But its worth 12 (check) common ideas and opinions to see whats really green. Step 4:Deal with the difficult points (1)Most of us are aware that we must take care of the environment,and the majority of us take steps to save energy and reduce waste and pol

10、lution. 【翻译】 【知识链接】be aware that.+句子;be aware of +名词/代词 意识到 n.awareness 意识, 认识 提高某人的意识 the majority of people 大多数人 major in take steps to do 采取措施做 【实战演练】大多数人已经意识到环境保护的重要性。首先,我们应该提高人们保护环境 的意识。更重要的是,我们应该采取措施来解决环境污染问题。 (2)Plastic bags cause litter and are a danger to wild animals,which mistake them for

11、 food. 【翻译】 【知识链接】mistake A for B 把 A 误认为 B by mistake 错误地;由于疏忽 【实战演练】他由于疏忽,错把珠宝当作了垃圾。 (3)It takes hundreds of years for plastic to break down,but much less time for paper. 【翻译】 【知识链接】break down 分解;(和谈)失败;(身体等)垮了。 其他相关短语:(火灾,战争)爆发 闯入 关系破裂 (4)However,making a paper bag uses four times as much energy

12、as making a plastic bag and up to three times the amount of water. 【翻译】 【知识链接】倍数表达:倍数+as much(不可数名词)/many(可数名词)+as;up to:多达;Its up to you. ;What are you up to? ;amount 还可作 v.,amount to 总计;共达 【实战演练】完成这个项目用了那个项目 2 倍多的时间。其费用共达 200 万。 (5)So,take a reusable bag with you when you go shopping. 【翻译】 (6)To m

13、ake sure your appliance is in fact off,remove the plug from its power supply. 【翻译】 【知识链接】remove.from.将从移开;remove gloves 摘下手套;remove problems 解决问题 【实战演练】他被撤去主席的职务。 (7)It seems like common sense:eating local food should be better for the environment,because it does not need to be transported long dist

14、ances and kept cold during transport. 【翻译】 【知识链接】common sense 常识 其他相关短语:方向感 ;有意义 ;弄明白 (8)It is the production of food,not its transport,that uses most of the energy and produces most of the greenhouse gases. 【翻译】 【知识链接】强调句构成:It is(was)+被强调部分+that(强调人可以用 who)+句子其他 【实战演练】正是塑料袋带来了白色污染。 (9)In some cases

15、,local produce might have used more energy and produced more greenhouse gases than produce grown a long way awayeven taking into account its transport. 【翻译】 【知识链接】a.may/might have done 表示对过去情况的推测,用在肯定句或否定句 中,might 的语气比 may 更不肯定,更弱。 He may/might have left when you got there. b.grown a long way away 在

16、句中是过去分词短语作后置定语,此句可以改写成定语从句: c.take.into account=take account of.考虑到,把考虑在内 take.into consideration 考虑到,把考虑在内 taking into account.为现在分词的独立主格形式,也称为悬垂分词,不受句子主语的限制, 类似的结构还有:generally speaking,strictly speaking,talking of.,speaking of.,judging from/by.,taking all things into account,considering. 【实战演练】考虑到

17、他的年龄,我们不该对他要求太多。 (10)It depends on how long you spend in the shower and how large your bath is. 【翻译】 【知识链接】 a.depend on = rely on 依靠,依赖,取决于 b.depend on 的使用: depend on sb./sth. depend on sb.to do sth. depend on +宾语从句 depend on it that. It all depends.视情况而定。 【实战演练】你的成绩取决于你对学习的态度。 (11)But its worth che

18、cking common ideas and opinions to see whats really green. 【翻译】 【知识链接】be worth doing. (doing 是以主动的形式表达被动的含义)值得做 【实战演练】这本书值得再读。 Step 5:Think Subheading 2:F;Subheading 3:It depends;Subheading 4:It depends Step 3: Truth 2:When you turn off a device,it goes into stand-by mode and still uses power. Sugge

19、stions:To make sure your appliance is in fact off,remove the plug from its power supply. Truth 3:In some cases,local produce sometimes might use more energy and produce more greenhouse gases than produce grown a long way away. Truth 4:It depends on how long you spend in the shower and how large your

20、 bath is. Suggestion:The key is to keep your shower time as short as possible. Task 2: 1.aware 2.to save pletely 4.better 5.ones 6.however 7.because 8.into 9.that 10.on 11.Environmental 12.checking Step 4: (1)【翻译】我们大多数人都意识到我们必须爱护环境,且多数人采取措施节约能源,减少 浪费及污染。 【知识链接】raise sb.s awareness;主修 【实战演练】The major

21、ity of people have been aware of the importance of environmental protection.First,we should raise peoples awareness of protecting the environment.More importantly,we should take steps to deal with the problem of environmental pollution. (2)【翻译】塑料袋会产生垃圾,同时对野生动物来说是一种威胁,它们会把塑料袋误当作 食物。 【实战演练】He mistook

22、treasure for rubbish by mistake. (3)【翻译】塑料分解需要几百年的时间,但纸张分解的时间要短得多。 【知识链接】break out;break into;break up (4)【翻译】然而,制造一个纸袋所消耗的能源是制造一个塑料袋的四倍,用水量多达制造 塑料袋的三倍。 【知识链接】由你决定;你在忙什么? 【实战演练】Finishing this project used twice as much time as that one.Its cost amounted to 2 million. (5)【翻译】所以,购物时随身携带一个可以重复使用的袋子。 (6

23、)【翻译】要确保您的设备实际上已关闭,拔掉电源插头。 【实战演练】He was removed from the position as a chairman. (7)【翻译】这似乎是常识:吃当地食物应该对环境更好,因为它不需要长途运输,并且在运 输过程中保持低温。 【知识链接】a sense of direction;make sense;make sense of (8)【翻译】消耗大部分能源和产生大部分温室气体的是食品生产,而不是食品运输。 【实战演练】It is plastic bags that bring about white pollution. (9)【翻译】在某些情况下,即

24、使考虑到农产品的运输,当地农产品比生长在很远的地方的 农产品可能消耗更多的能源,产生更多的温室气体。 【知识链接】In some cases,local produce might have used more energy and produced more greenhouse gases than produce which is grown a long way away even taking into account its transport. 【实战演练】Taking his age into account,we shouldnt request too much from

25、him. (10)【翻译】这取决于你花在淋浴上的时间,以及你的浴缸有多大。 【实战演练】Your grades depend on your attitude to study. (11)【翻译】但是值得核实一下常见的想法和观点,看看什么是真正绿色的(生活)。 【实战演练】This book is worth reading again. Step 5: Lets go green 1.reduces the amount of rubbish/garbage 2.second-hand furniture and books 3.reusable shopping bags 4.learn to repair it by yourself 5.borrow or rent them 6.donating it to the charity 7.The leftovers 8.Make use of your imagination 9.can be made into 10.Clothes in good condition