外研版（2019） 必修第二册 Unit 6 Earth First Earth First Developing ideas 课件（33张PPT）

(共33张PPT)
Unit 6 Earth first
复习语法 用单词的正确形式填空
1. As the stone was too heavy to move, I left it ______(lie) on the ground.
2. The teacher explained the grammar in detail to make himself _________ (understand).
3. Don't leave the water _______(run) while you brush your teeth.
4. I saw some villagers _______(seat) on the bench.
5. I smell something _______(burn) in the kitchen.
6. Lucy has a great sense of humor and always keeps her colleagues _______ (amuse) with her stories.
7. with his hair _______(cut), he looked much younger.
复习语法 用单词的正确形式填空
1. As the stone was too heavy to move, I left it lying (lie) on the ground.
2. The teacher explained the grammar in detail to make himself understood(understand).
3. Don't leave the water running(run) while you brush your teeth.
4. I saw some villagers seated (seat) on the bench.
5. I smell something burning (burn) in the kitchen.
6. Lucy has a great sense of humor and always keeps her colleagues amused (amuse) with her stories.
7. with his hair cut (cut), he looked much younger.
Developing ideas
What's really green
Paper shopping bags are better than plastic ones.
When you turn off a device, it stops using power.
Eating local food is good for the environment.
It’s better to take a shower than a bath.
Do Ex1 on page 68.
Look at the questions about “green living”
and tick(打√)your answer.
Look at the questions about “green living” and tick your answers.
1. Which shopping bag is more environmentally friendly（环保的）
□ A plastic bag.
□ A paper bag.
□ Neither of them.
Check the answers
2. What should you do to save energy when leaving your room 节约能源
□ Turn off a device.
□ Unplug a device.
□ Neither of these.
3. What food is better for the environment
□ Food produced near to where you live.
□ Food produced far from where you live.
□ Neither of them.
4. Which uses less water
□ Taking a bath.
□ Taking a shower.
□ It depends.（看情况而定）
Conclusion
Introduction
Body
green
truth 1
green
truth 2
green
truth 3
green
truth 4
Read the passage and draw a mind map to show the structure of the passage.
Read the effects and complete the causes of these according to the passage. Do Ex 3 on page 70.
CAUSES
EFFECTS
1. Making a paper bag uses more energy and water than making a plastic bag. It also produces more greenhouse gases.
Paper bags are not good for the environment.
2. Devices turned off go into stand-by mode and still use power.
Turning off a device won't stop it from using power.
3. Local produce sometimes might use more energy and produce more greenhouse gases than produce grown a long way away--even taking into account its transport.
Eating local food isn't always better for the environment.
CAUSES
EFFECTS
4. If you spend more than eight minutes in a shower, you'll use as much water as in a bath--about 50 litres of water.
CAUSES
EFFECTS
It's not always better to take a shower than a bath.
language points
What's really green
Most of us are aware that we must take care of the environment, and the majority of us ①take steps to save energy and reduce waste and pollution. But recently, some “green truths” completely false. ②Here are some common ones. Which are really green
解析：①take steps to do ...采取步骤(措施) 做......
take meaures to do ... 采取措施做......
take action to do ... 采取行动做......
②Here are some common ones. here 引导的完全倒装句，
倒装句概念：
有时由于语法或修辞的需要将谓语的部分或全部提到主语前面，这样的语序叫做倒装。
倒装句种类：
完全倒装： 整个谓语移至主语前面叫完全倒装 。
部分倒装： 只把助动词、系动词或情态动词放在主语之前叫部分倒装 。
2. here, there, now, then, thus等副词置于句首, 谓语动词常用be, come, go, lie, run。例如： There goes the bell.
Then came the chairman.
Here is your letter.
3.以out, in, up, down, off, away等副词开头，谓语动词是表示“移动”的go, come, leave等句子里。
Away went the crowd one by one.人们一个一个地离去。
In came a stranger in black.进来了一位穿黑衣的陌生人。Down fell the leaves.树叶掉了下来。
全部倒装常见结构有：
1.there be 句型。引导词there 还可以接appear, exist, lie, remain, seem, stand, live 等词。
There is a mobile phone and some books on the desk.桌上有一个手机和一些书。
There are thousands of people gathering on the square.广场上聚集着成千上万的人注意:
4.表示地点的介词词组位于句首，谓语动词是表示“存在”之意的be, lie, stand, exist等句子中。
South of the lake lies a big supermarket.湖泊的南边是一个大超市。
In front of the house stopped a police car. 一辆警车停在房子前面。
Under the tree sat a boy. 一个男孩坐在树下。
5. such 做表语放于句首，句子要全部倒装。
Such is the fact.
Such is his advice for you.
Paper shopping bags are better than plastic ones.
Plastic bags cause litter and are① a danger to wild animals, which ②mistake them for food. ③It takes hundreds of years for plastic to break down, but much less time for paper. Because of this, people think paper bags are the better environmental choice.
danger n （U）危险;（C）危险的人或者物
抽象名词具体化使用，类似的词有：surprise, pleasure, honur, pity, success, failure, help, beauty, shock, concern, must, comfort等。
dangerous adj 危险的
常用搭配：in danger 处于危险当中 out of danger 脱离危险 a danger to 对……来说是个危险（人/物）
endanger v使……濒临危险 endangered adj濒临危险的
Coronavirus infectious pneumonia( [nju m ni ]肺炎) which is dangerous is a danger to us and has put many people in danger . Fortunately, up to now, many patients have been out of danger.
mistake …for… 错把…当成…
break down 分解，分化
eg After many years, rocks break down into dirt.
Food is broken down in the stomach.
break down还意为：
The plan was good, but it broke down, because people were unwilling to cooperate.
We are sorry to arrive late, but the car broke down.
Your health will break down if you work too hard.
The young woman broke down in tears.
(计划、谈判等）失败
（机器、车辆等）坏了
（身体）垮了
感情失控（痛哭起来）
“a large / considerable / ... amount of +不可数名词”作主语时，谓语动词常用单数形式；
“amounts of +不可数名词”作主语时，谓语动词常用复数形式。
eg A large amount of damage was done in a very short time.
Small amounts of land were used for keeping animals.
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 greehouse gases.
amount v. 总计，共达，常与介词to搭配。
eg His debts amount to more than 200,000
dollars.
是……的四倍
amount n. 数量，数额
倍数的表达方式
倍数+as + adj.原级+as…
倍数+比较级+than…
倍数+the +名词(width/depth /height/ length/ size/amount …)+of…
eg. The population of China is four times as large as that of America.
The population of this country is four times larger than that of America.
The population of this country is four times the amount of that of America.
按要求补全下列句子
1. 条河是那条河的两倍长。(用比较级）
This river is ___________________that one.
2. 这条街是那条街的四倍长。(用名词）
This street is_____________________________that one.
3.亚洲的面积是欧洲的四倍。(用原级）
Asia is four times ______________________Europe.
twice longer than
as large as
four times the length of
In fact, both kinds of bags are bad for the environment. So, take a reusable bag with you when you go shopping.
对...... 有害 be bad for / be harmful to ...
do harm to ...
a reusable bag 可重复使用的袋子
remove 移走， 拿开，开除，免职
remove ... from ... 从...... 中拔掉/移除
remove sb. from office 把某人撤职
sb. be removed from school 某人被学校开除
When you turn off a device, it stops using power.
When we turn off a device, such as television, it goes into stand-by mode. Devices in this mode still use power, and older devices in stand-by mode can use even more. This happens because electricity continues to leak from the device, even when it is turned “off”. To make sure your appliance is in fact off, remove the plug from its power supply.
电源
Eating local food is good for the environment.
It seems like common sense: eating local food should be better for the environment, because it does not need to be tansported long distaces and kept cold during transport. Unfortunately, it is not that simple.
common sense 常识
be good/better for 对......好/更好
do good to ...对......好
that simple = so simple 如此简单
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：It is/was +被强调成分+that/who(对人强调时that 和who 都可以)+剩余的成分
注意：1.此结构可对句子的主语，宾语和状语(包括主语/宾语/状语从句)进行强调（对谓语动词的强调需要用do/does/did +动词原形）。
2.去掉强调结构后，句子依然完整。
3.对not… until …结构的强调,要把not 一起强调。
2)produce v. 生产；创作；生长
eg Their factory produces 500 bikes a day.
He has produced a lot of songs in the past ten years.
The tree produces much fruit each year.
1)take … into account/consideration 把……考虑进去eg .She seemed not to take the rising oil prices into account when buying a car.
In some cases, local produce might have used more energy and produced more greenhouse gases than produce grown a long way away—even taking into account its transport.
produce u.n. 农产品(不可数名词）
eg They provide us with fresh produce
every day.
produce, product与production
produce u.n. 农产品
product c.n. 产品，制品
production u.n. 生产行为，产量
情态动词+have+done是历年高考的重点和难点之一，现将其用法总结归纳如下：
must+have+done 一定做过某事，该结构只用于肯定句。
could+have+done 本来能够做某事而没有做。
couldn't /can't+have+done 不可能做过某事。
may+have+done 可能已经做过......，用于肯定句中。
might+have+done 可能已经做过,但可能性更小.
should+have+done 意思是“本来应该做某事,实际没做。
shouldn't+have+done 本来不应该做某事，而实际做了。
needn't+have+done 本来不需要做某事而做了”该结构只用于否定。
It’s better to take a shower than a bath.
It depends on how long you spend in the shower and how large your bath is. If you spend more than eight minutes in a shower, you'll use as much water as in a bath--about 50 litres of water. Therefore, the key is to keep your shower time as short as possible.
depends on 依靠
depend on / rely on sb. to do 依靠某人做某事
independent adj. 独立的
be independent of sb./sth. 独立于某人/ 某事
Your questions should be independent of each other你的问题应该彼此无关。
Environmental awareness is now part of daily life. But It's worth checking common ideas and opinions to see what's really green.
Environmental awareness 环保意识
raise awareness 提高意识
aware adj. 意识到的，有...... 意识的
be aware of ... 意识到
It's worth doing ... 做...... 是值得的
It is worth learning english.
It is worth it. 这事很值。
sth. is worth doing ... ......值得做
熟记下列短语
1. 环保的 environmental friendly
2. 节约能源 save energy
3. 看情况而定 It depends.
4. 照顾 take care of
5. 采取措施 take steps
6. 大多数...... the majority of ...
7. 把...... 误认为...... mistake... for ...
8. 分解 break down
9. 对...... 有坏处 be bad for
10. 确保 make sure
11. 实际上 in fact
12.从...... 拔掉/ 移除 remove ... from ...
13. 常识 common sense
14. 在一些情况下 in some cases
15. 把...... 考虑进去 take ... into account
16. 环保意识 environmental awareness
17. 做...... 是值得的 it's worth doing