资源简介

(共30张PPT)
Unit 3 Trees and us
主题范畴：
人与自然
主题群：
自然生态；环境保护
子主题：
热爱与敬畏自然，与自然和谐共生
Key question
Why do we need trees
1. branch /brɑ:nt /
2. root /ru:t/
3. silent / sa l nt/
4. overlook / v l k/
5. human / hju:m n/
6. oxygen / ks d n/
7. create /kri e t/
8. environment / n va r nm nt/
9. convenient /k n vi:ni nt/
n. 树枝
n. 根；根茎
adj. 不说话的；沉默的
v. 忽略；未注意到
n. 人
n. 氧；氧气
v. 创造
n. 自然环境
adj. 便利的；方便的
New words and phrases
P36-P37
10. furniture / f :n t (r)/
11. wood /w d/
12. treat /tri:t/
13. take in
14. greenhouse gas
15. to begin with
e from
17. look around
18. be made of
19. for example
n. （可移动的）家具
n. 木；木头
v. 以……态度对待；
以……方式对待
吸收；摄入
温室气体
首先；第一点
来自
环视；环顾；四下察看
由……制成
例如；譬如
First thoughts
What do trees do for us
How amazing are trees
How can we save trees
How do we make use of trees
Think:
Label the different parts of a tree with the words below.
fruit
branch
trunk
root
flower
leaf
Before you read
P36
Talk in pairs about what trees do for us.
What do trees do for us
What else do trees do for us
They also take in greenhouse gases like CO2. ...
Think：Trees can also ...
They provide us with different fruits.
While-Reading
On Tree Planting Day, Yangguang Junior High School posted the following article on its website. Read the article and discover some interesting facts about trees.
P37
Read the title, pictures and the first sentence of each paragraph, then answer the following questions.
1. What does “Our silent friends”
refer to
2. What’s genre of the article
3. What does the picture in circle
mean
Trees.
Expository writing.
Trees can take in greenhouse gases like CO2 and produce oxygen.
Skimming
2. Read the article and match the main idea with
the correct paragraphs.
Para. 1
Para. 2
Para. 3
Para. 4
Trees are everywhere.
Trees are important for all the living things.
Trees make our lives more conveient.
We should protect trees.
Skimming
What do trees do for us
Trees are very important for all living things on Earth.
Forests are home to (1)___________________________.
Trees take in (2)__________________________ and produce (3)______________.
Trees also make our lives (4)______________________.
Things like (5)______________________ come from trees.
A lot of furniture in our homes (6)___________________.
We get (7)_____________________ from trees (e.g. tea).
Complete the poster below with the information from the article on page 37.
Reading comprehension
animals, insects and plants
greenhouse gases like CO2
oxygen
more convenient
paper and pencils
is made of wood
delicious fruit and
wonderful drinks
Scanning
P38
Reading Strategy: Telling facts from opinions
Facts are true pieces of information about the world. Opinions are people’s personal feelings and beliefs.
They (Trees) take in greenhouse gases like CO2 and produce oxygen. (Fact)
They (Trees) are our silent friends, but we often overlook them. (Opinion)
Can you find more examples in the article
P37
Read the article again and try to find examples of facts and opinions in it.
P38
Facts Opinions
... they take in greenhouse gases like CO2 and produce oxygen. They are our silent friends, but we often overlook them.
Many of the things around us, such as paper and pencils.
For example, we can make tea from the leaves of the tea tree.
We are cutting down forests all around the world.
We are polluting the water and the air, and this harms trees.
In fact, trees are very inportant for all living things on Earth.
... forests are a safe place for animals, insects and plants to live.
Trees make our lives more convenient.
We can’t imagine a world without them.
However, humans are not treating trees in a kind way.
We need to do more to protect trees and save our planet.
(1) What is the purpose of the article
What does the writer want to tell us
(2) How do you understand the sentence “We can’t imagine a
world without them (line 17)”
(3) What else do trees do for us
3. Discuss the questions below.
This article shows us the importance of trees in our daily lives. And the writer wants to tell us to protect them.
Trees are important to us and they do so much for us. We can’t live without them.
Possible answer: Trees help to prevent sand from raising in the storm.
Post-Reading
P38
Let’s watch a video and find out what will happen if we live without trees.
Retell the importance of trees
1. Forests are ... for animals, ...
2. Trees take in ... and produce ...
3. Many of our things ...
4. A lot of furniture ...
5. Trees also provide us with ...
Vocabulary practice
Look at the article on page 37 and find words with similar meanings.
P39
(1) not making any sound _________(line 2)
(2) a gas we need in order to live _________(line 8)
(3) easy; easy to do _________(line 11)
(4) a hard material used for making tables, chairs, pencils, etc.
_________(line 14)
(5) to act in a certain way towards someone or something _________(line 18)
silent
oxygen
convenient
wood
treat
Complete the information column on the school website with the words from Exercise 1. Change the form if necessary.
P39
silent
treat
oxygen
convenient
wood
Make sentences about what trees do for us with the words and expressions below.
convenient drink environment
fruit wood be made of
produce oxygen take in greenhouse gases
Trees provide us with ...
Word Building
Adjective suffix: -ful, -less
We can add -ful to the end of some nouns to make adjectives. It is a suffix meaning “full of”. To have the opposite meaning, we can add -less.
use → useful use → useless
harm → harmful harm → harmless
Can you give more exmples of making adjectives this way
1. Trees also provide us with ... and wonderful drinks.
2. She gave us some useless information ...
Example
-ful -less
beauty →
thank →
colour →
hope →
care →
beautiful
thankful
colourful
hopeful
careful
help →
hope →
home →
care →
end →
helpless
hopeless
homeless
careless
endless
1. What else do trees do for us
树还能为我们做什么？
else 是副词，意为“另外，其他”，其具体用法如下：
(1) 用于以some-、every-、any-等开头的复合不定代词
后，或疑问词后。
翻译：
我还有其他事情想要谈一谈。
There’s something else I’d like to talk about.
还有谁参加了聚会？
Who else was at the party
(2) 固定短语 or else 意为“否则，要不然”。
翻译：
快点，否则我们就赶不上火车了。
Hurry up or else we’ll miss the train.
2. Just look around your room — a lot of the furniture is
made of wood.
环顾一下你的房间——很多家具是由木头制成的。
be made of 由……制成（能从物品中看出原材料）
be made from 由……制成（指看不出原材料）
翻译：
风筝是用纸做的。
The kite is made of paper.
这酒是大米酿制的。
The wine is made from rice.
3. Trees also provide us with delicious fruit and wonderful
drinks. 树木还为我们提供美味的水果和好喝的饮料。
provide 是动词，意为“提供；供应”。
provide sb. with sth.
provide sth. for sb.
翻译：
经理同意为我们提供免费饮料。
The manager agreed to provide us with free drinks.
我们会为你们提供最好的服务。
We will provide the best service for you.
“为某人提供某物”
4. We can’t imagine a world without them.
我们无法想象没有它们（树木）的世界。
imagine 是动词，意为“想象；设想”。后接名词、代词、动名词或宾语从句。
imagination 是动词，意为“想象力”。
翻译：
你能想象她成为一名歌手吗？
Can you imagine her becoming a singer
那个男孩喜欢想象自己是个飞行员。
The boy likes to imagine himself as a flyer.
5. We are cutting down forests all around the world.
我们正在砍伐世界各地的森林。
cut down 意为“砍伐；砍倒”。该短语是“动词+副词”结构，如果代词作宾语，要将代词放在cut与down中间。
翻译：
他们把花园里所有的树木砍倒了。
They cut down all the trees in the garden.
这棵树长得非常好，所以我们不应该砍倒它。
The tree grows very well, so we shouldn’t cut it down.
6. It is harmful when the branches and leaves of trees join
together. 当树的枝叶连接在一起时是有害的。
harmful 是形容词，意为“有害的”。其名词和动词形式均为harm，反义词为harmless。
be harmful to = do harm to = be bad for 对……有害
翻译：
吸烟对健康有害。
Smoking is harmful to health.
它们对儿童有害。
They are harmful to children.
7. The tree is quietly giving off a smell.
那棵树正在悄悄地散发着气味。
(1) smell 是名词，意为“气味”。
翻译：
真香啊！
What a delicious smell!
(2) smell 还可作感官动词，意为“发出……气味；闻起来”，后接形容词，说明主语的状态。类似的感官动词还有：taste 尝起来 feel 摸起来
翻译：
These flowers _______(闻起来) very sweet.
The soup in the bowl _______(尝起来) very delicious.
The tomatoes _______(摸起来) very soft.
smell
tastes
feel
Thank you!

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