Unit 2 Plant a Plant.| lesson13 Why are plants important?(河北省保定市)

课件34张PPT。Lesson 13 Why Are Plants Important?Learn the new words :
reason pleasant among
air dig ( dug dug ) shade
energy nothing die (died died) heat bamboo kilogram
Let’s talk about trees and the reason why we need them. It’s pleasant to walk among the trees.Trees help clean the air.shade ---- in the shade bambooPandas eat bamboo only. Big pandas eat eighteen kilograms of bamboo everyday.All plants take energy from the sun and made it into food. Without food , they would have nothing to eat and they would die.dig dug dug
dig a hole
They dug the earth last year.heat . n
Light is energy. Heat is energy.
heat. v ----- make something hot
例: Pat heated some milk in the saucepan(锅).Read the text and answer the questions .1. What are Danny, Jenny and Brian talking about?
They are talking about trees and the reason why we need them .
2. Donuts don’t grow on trees, do they?
No, they don’t.
3.Why do we need trees ?3.Why do we need trees ?
Clean the air.
Give us food.
Make and build things with trees .
Sit under a tree in the shade.
Make books from trees.
Many animals live in trees.
Cover the soil.
Take energy from the sun and make it into food.
people and animals need the food to live. Answer some questions :
1.Are plants important ?
2. Are there a lot of plants around us ?
3. What kind of things can plants do ?
1.完成下列的句子:
Trees can help...
We can … things with trees.Do you know the difference?1.It’s pleasant to walk among the trees.
I’m very pleased you can come.
pleasant 指一般性的好，强调所修饰对象所具有的品质使人觉得好玩、有趣、舒服，含有客观性。
pleased 只用于人不用于物，指某人满足了自己的愿望而感到高兴。
I sit between Danny and Jenny.
among 一般用于三者或三者以上之中。
between 一般 用于两者之间。Let’s talk about trees and why we need them. 我们讨论树和我们为什么需要树。
Let’s =Let us意为“让我们”，let是动词，us做let的宾语，该句型结构为let sb. do sth.“让某人做某事”。表示说话人的建议，对该句型的肯定回答一般用“OK” “All right.” “Yes, let’s…”。其否定回答用”Sorry, I …”。
--Let’s have a cup of tea. –OK. 我们喝杯茶吧。好吧。
--Let’s sing A B C song. –Sorry, I can’t sing it. 我们唱字母歌吧。对不起，我不会唱。Trees help clean the air. 树能帮着清洁空气。
help vt. 帮助，常用于两个句型：help sb. (to) do sth.和help sb. with sth.都有“帮助某人做某事”之意。介词with后接名词，通常不接动词-ing形式。
Mr. Wu helps me (to) learn English. = Mr. Wu often helps me with my English. 吴先生帮我学英语。Donuts don’t grow on trees! 树上不结面包圈。
on trees在树上
辨析：on the tree (on trees) 与in the tree (in trees)
两者都表示“在树上”，用in时一般表示不从属于树本身生长的，如鸟、人等。用on时则指树本身的东西，如树叶、花等。从空间的角度看，用in表示在树上的枝叶中，用on则表示在枝叶上，in和on不能互换。
There are some apples on the tree. 树上结着一些苹果。
There is a bird in the tree. 树上有一只鸟。Then the water don’t carry the soil away. 这样风和土就不会把土壤刮走、冲走。
carry away把搬（移）走
the flood carried away the wooden bridge. 洪水把桥冲走了。
拓展：
carry back运回，拿回 carry off轻而易举地完成 carry out 执行 carry forward发扬，推进All plants take energy from the sun and make it into food. 所有的植物从阳光中吸收能量并（用它）来制造养料。
make into把制成用于主动语态，be make into用……制成，用于被动语态。
Make glass into bottles. 用玻璃制成瓶子。
Metals can be made into all kinds of things. 金属可以制成多种多样的物品。Without food, they would have nothing to eat and they would die. 没有食物，他们将没有可吃的东西并且死亡。
without prep. 无，没有；反义词with. 如：
Fish can’t live without water. 没有水鱼不能活。
We can’t finish the work on time without your help. 没有你的帮助我们不会按时完成工作。
2) die v. 死，死亡。dead 是形容词。death 是名词。 dying是现在分词。Are their answers the He has been dead for ten years. 他已经死了十年了。
Her death is very great. 她死的非常壮烈。
The little girl is dying. 这个小女孩快要死了。Retell the text. Trees help______ the air.They give us ____--like apples,bananas and oranges.We can ______and _____things with trees—like chairs, beds and houses! We can sit under a tree in the ______.Plants_______ the soil. Then the wind and water don’t _______ the soil away. All plants take ________ from the sun and make it into food. People and other animals need the food to______.Without food, they would _______. cleanfoodmakebuild shadecovercarryenergylivedieRead the text by yourselves. Then translate the following into English:
1.树有助于净化空气.
____________________________
2 面包圈不长在树上.
_________________________
3. 那时我们可以坐在树底下的阴凉处.
____________________________
4. 而且,许多动物以树巢.
__________________________Trees help clean the air..Donuts don’t grow on trees.Then we can sit under a tree in the shade.
Also, many animals live in trees.5.所有的植物都能从太阳那里的到能量,然后把他转化成为食物.
________________________________________________________.
6. 如果没有足够的食物,他们就会死去.
______________________________________
_____________________.All plants take energy from the sun and make it into food.Without food ,they would have nothing to eat
and they would die. 专项练习:一.用A .in B. on选择填空:
1. There are some birds_________ the trees.
2. There are many apples _______the trees.
3. Look !The kite is _____ the sky.
归纳: on trees 也可以表达为: on the tree.指的是树上本身的东西,in the tree, 也表示在树上,但它指的是外来的东西.ABA专练二. 记住下列词组的用法:
(1) make … into … “把……制成……”
be made from “由(原料)制成”
be made of “ 由( 原料)制成”
be made by 被(某人)制成
be made in 在(某地)制造
(2). 选择填空:
1. We make books ___ trees.
A. in B .from C. at D. in B 2. We can make cotton _______ cloth.
A. into B. on C. from D. of
The chair is made _____ wood.
A. in B. of C. into D. from
4. The bike is made ____ Shanghai.
A. of B. into C. from D. inAB D 专练三: 翻译下列词组:
1.在阳光下 _____________
2.在灯光下______________
3. 在书桌下面_____________ in the sun in the lightunder the desk Do we need plants?
Why do we need them ? Find three answers to this question.
Write down your answers.Text: 一.Choose the best answer:
Are there many trees________ ?
A. where do you live B. you live where
C. where you live D. you live there
2. let’s ____ the trees why we need them.
A. to talk about B. talking about
C. talk at D. talk about
3. Donuts don’t grow _____ trees!
A. in B. on C. at D. in cDBThe desks are made _______ wood.
A. in B. from C. into D. of
5. People and other animals need food______.
A. living B. live C. to live D. lives
6. Can you see seven monkeys ____ the tree.
A. on B. in C. under D. above DCBFill in the blanks according to the Chinese given .
1. Trees _________________ (帮助清洁) the air.
2. I ___________ ( 想种) a donut!
3. Then we can sit under a tree _________
(阴凉里).
4. We _________ books ________( 用... ... 来制成) trees.
5. People and other animals need _________________(食物生存)._________help cleanwant to plantin the shademakefromfood to livePRACTICE Choose the best answwer.
1.Are there many trees_____?
A.where do you live B. You live where
C.where you live D. you live there
2. Let’s ______trees and why we need them.
A. to talk about B.talking about C.talk at D. talk about
3. Donuts don’t grow ____trees.
A.in B. on C. at D.from CDB4. We make books ____trees.
from B. on C. at D.in
5. People and other animals need food ___.
A.living B.live C.to live D.lives
6.Miss Liu walks____the students.
A.between B.among C.in D.for
7.People can’t live _____air or water.
A.with B. without C.in D.and ACBBHomework No cross,No crown!Write a diary about why we need trees. Thank you!Good-bye!