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(共27张PPT)
Unit 2 Saving the Earth
Topic 3
What can we do at home to protect the environment
Section D
Learning aims
一、掌握以下单词：remove, replace, dry, insect, bite等。
二、通过阅读了解有关植树造林的困境与解决之法。
三、能够根据不同的阅读目的运用阅读策略获取信息。
四、引导总结连接词but, and, or, while的区别和用法。
Grammar
Compound Sentence
Recycling can protect the environment, _______ it can save money, too.
Some things we have done are good for the earth _________ some are bad.
We should do everything to protect it, ________ we’ll be punished and lose our home.
Actions can speak, _______ words can't do it .
and
while
or
but
Grammar
连接词 or, and, but 和 while的用法
连接词 or, and, but 和 while的用法
并 列 连 词 作 用 主 要 连 词
表并列 and（和，而且) as well as(也,和...一样)
both…and / not only…but also(不但...而且)
neither…nor(即不..也不..) ...
表选择 or (或者;否则)
either…or(要么...要么)等
表转折 but（但是) however（然而，可是）
while (然而-表对比) not...but(不是...而是)...
表因果 for(由于）because(因为) so(因此）...
Exercises
( ) 1. Help others whenever you can, _____ you’ll make the world a nicer place to live in.
A. or B. and C. but D. while
( )2. Cross the road carefully, ________ you’ll keep yourself safe.
A. so B. or C. but D. and
( ) 3. Hurry up, ________ you’ll be late for the concert .
A. or B. so C. but D. and
B
D
A
( ) 4. ---Tell us something about Canada, OK
--- I’m sorry. _____ Jack ___ I have ever been there.
A. Either, or B. Not only, but also C. Both, and D. Neither, nor
( ) 5. I always enjoy visiting London, ______ I wouldn’t like to live there.
A. because B. so C. but D. and
( )6. There are many sports lovers in his office.
Some love climbing, ____ others enjoy swimming.
A. Or B. for C. while D. so
( ) 7. ___ she ___ I know his telephone number, because it has been changed.
A. Both; and B. Either; or C. Not only; but also D. Neither; nor
D
C
C
D
Functions
Would you like to be a __________ person
First, you ought to _________ the electricity when you leave a room.
__________ said than done.
Action speak _________ than words.
Even German experts think _________ of the technology of China's high-speed train.
greener
shut off
Easier
louder
highly
Trees' functions
B. A lot of water can be
saved by forests.
A. Trees can
from blowing the earth away.
from washing the earth away.
stop the wind
C. Trees can
stop the water
Review
Trees can remove ______________ from the air and then make ____________.
carbon dioxide
oxygen
Trees are the _________ of the earth.
The earth cannot breathe __________(with) them.
lungs
without
In order to develop _________(rapid),
people cut down ______ number of wood to build houses.
lungs
a
Many volunteers around the world are working to plant new trees. _________, they face many difficulties.
However
Fast-reading
Decide which of the following sentences is true“T”or false“F”.
1a
1. Forests are the hearts of the earth. ( )
2. In many countries, forests were cut down to make money. ( )
3. These planters face quite a few difficulties when planting new trees. ( )
4. Even though planting is very difficult, planters succeed at last. ( )
F
F
T
T
Fast-reading
The main idea of the passage is___________.
A. Forest are the lungs of the earth.
B. We should plant more trees to protect the earth.
C. Tree planters are changing the world.
D. Tree planters face many difficulties.
Careful-reading
Read the passage and answer the questions.
2. What difficulties do tree planters face when they plant trees
1. How do you understand " Forests are the lungs of the earth"
Forests can remove carbon dioxide from the air and make oxygen.
1a
carry small trees
difficulties
1.weather
2.insects
3. bags
4. workplace
Careful-reading
Read the passage and answer the questions.
1a
3. What will happen if we do not plant new forests
4. Would you like to be a tree planter when you are older
Why or why not
The forests will become smaller and smaller and we cannot breathe without them.
Yes, because planting trees can protect the environment.
① Forests are the lungs of the earth. Without them, it cannot breathe. It needs its forests to remove carbon dioxide from the air and to make oxygen. In many countries, such as New Zealand, Canada, and Brazil, forests were cut down to provide wood to build houses. Many volunteers around the world are working in their holidays to plant new trees to replace them.
② They face many difficulties when planting new trees. The weather may be very hot and dry or it may be very cold and wet. There are often many insects that bite these planters on their legs, arms, and faces while they work. They carry heavy bags of small trees, and working in the mountains can be dangerous.
③ Chinese volunteers have helped plant lots of trees around the world. They have big plans to grow more forests and have used new technologies to reach their goals. By planting millions of trees every year, they are not only making their own environment better but also helping the whole world. This shows that Chinese really care about the earth.
1. Do you recycle newspapers or cans
A. Often. (2) B. Seldom.(1) C. Never.(0)
2. What do you usually take
A. A bath.(0) B. A shower.(2)
3. When you have a short journey, how do you usually go there
A. Walk or ride a bike.(3) B. Go by car.(0) C. Go by bus.(2)
4. What do you usually do when you see others littering
A. Stop them.(2) B. Pick the litter up.(1) C. Do nothing.(0)
5. How often do you use paper towels
A. Often. (0) B.Seldom.(1) C. Never.(2)
6. How often do you eat fast food
A. Often.(0) B. Seldom.(1) C. Never.(2)
7. What type of bags do you use for shopping
A. Baskets or cloth bags.(3) B. Reused plastic bags.(1)
C. New plastic bags.(0)
8. How often do you turn off the lights when you leave a room
A. Nearly always.(2) B. Seldom. (1) C. Never.(0)
Finding the Greenest Person
Finding the Greenest Person
0-4 You have not started turning green yet.
5-9 You are pale green.
10-13 You are medium green. Try harder.
14-15 You are bright green, but do not stop trying.
Scores
__________(Your partner’s name),
Your scores are ____. You often _______ and you usually ________. But you seldom /never _________. So you have not started turning green yet.
Conj. 连词
How to become a greener person
Would you like to be a greener person Here is some advice for you. First, you should/had better/… ____________ . Second, ____________________. Third, ______________ . Finally, ______________ .
The earth is our home. Everyone should try his best to protect it.
Post-reading
We learn:
We can:
Summary
1. Some words: dry
2. Some phrases: provide sth. to do sth.; face difficulties; even though
3. Some sentences:
(1)Without them, it cannot breathe.
(2)They plant different types of trees so that birds and animals can live in the forests.
1. Use the compound sentence correctly.
2. Realize the importance of the forest.
Thank you !
Thanks!
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