外研版九年级英语上册Module 12 Save our world Unit 3-1教学课件(共20张PPT)

(共20张PPT)
Module 12
Save our world
Unit 3 Language in use-1
Read and match
1. Polluted water is not healthy.
2. It’s something we can use again.
3. The water in the river was very dirty.
4. It’s not true that we don’t listen to students.
5. It was not possible to clean up the whole river.
6. The people on the mountain top were not comfortable.
a reusable b uncomfortable c unhealthy
d unclean e impossible f untrue
c
a
d
f
e
b
Warm-up
1. Reuse means “use again”.
2. Though pollution is heavy now, I don’t think it’s hopeless.
Language practice
Presentation
Sometimes if you know the meaning of the parts of a word, you can work out the meaning of the whole word.
re + new + able renewable
again
can be
can be new again
Learning to learn
构词法
Presentation
1. 将两个或两个以上独立且语义不同的单词合在一起构成新词的方法称作
合成法。
合成名词 afternoon, sportsman, blackboard, newspaper, airplane, classmate…
合成形容词 kind-hearted, middle-aged, hard-working…
合成副词 however, maybe…
合成代词 himself, everyone, nothing…
合成动词 overlook…
Presentation
2. 英语构词法中把一种词性转化为另一种词性而词形不变的方法称为
转化法。
(1) v. → n.
— Let’s talk about it more.
— I think we’d better finish the talk now.
——咱们再谈谈这件事吧。
——我想我们最好现在结束谈话。
(2) n. → v.
— She gave me a cup of water.
— You should water the flowers twice a day.
——她给了我一杯水。
——你应该每天给这些花浇两次水。
Presentation
help
helpfully
helplessly
helpful
helpless
able
disable
unable
enable
ability
3. 通过在词根前面加前缀或在词根后面加后缀构成一个新词的方法称作
派生法。
Presentation
(1) 表示否定意义 “无，不”的前缀：
impolite, impossible
un-
in-
dis-
im-
unfair, unhappy
inexpensive, indirect
disagree, disappear
前缀：
Presentation
(2) 表示 “再”的前缀：
re-
rewrite, reuse, recycle
(3) 表示 “错误地”前缀：
mis-
mistake, misunderstand
前缀：
Presentation
suitable，comfortable
后缀：
(1) 表示“可能，易于，适合于”
–able
(2) 表示“充满……的，具有……性质的”
(3) –less 与-ful 相反，表示“少的，不足的”
–ful
helpful, hopeful, useful, careful
helpless, hopeless, useless, careless
–less
Presentation
-able
-ful
im-
-less
re-
un-
care
collect
hope
possible
use
usual
wanted
waste
A
B
careful careless
collectable
hopeful hopeless
impossible
reuse usable useful useless
unwanted
wasteful
unusual
Make new words.
Join the parts of the words in Box A with the words in Box B.
You need to use some of the parts more than once.
Practice
Now work in groups. Play the guessing game English for Fun.
1. full of care _________
2. can be collected __________
3. full of hope _________
4. without any hope _______
5. not possible _________
6. not usual __________
7. without any use ______
8. use again __________
9. not wanted _________
10. making a lot of waste ___________
careful
collectable
hopeful
hopeless
impossible
unusual
useless
reuse
unwanted
wasteful
English for Fun
Practice
Complete the sentences with the words in the box.
hopeful impossible reuse unhealthy wasteful
1. Polluted water is _________.
2. It is _________ to throw so much food away.
3. If you look after things well, you may _______ some of them later.
4. It is _________ to clean up the whole river in such a short time.
5. If we pay attention to pollution now, the future will be _________.
unhealthy
wasteful
reuse
impossible
hopeful
Practice
Complete the table.
Noun Verb Adjective Adverb
useful/ useless
hope hopefully/ hopelessly
pollution ——
water —— ——
waste
—— ——— usually/ unusually
use
use
usefully/ uselessly
hope
hopeful/ hopeless
pollute
polluted/ unpolluted
water
waste
wasteful/ wasted
wastefully
usual/ unusual
Practice
Complete the sentences with the correct form of the words in Activity 3.
She was _______ that her new job would make her more successful.
hopeful
1. The factory ________ the river, and the fish died.
2. We often walk in the countryside. It is a(n) _______ activity for us.
3. Do not use so much water. It is very ________.
4. To keep the flowers growing, you need to _______ them once a day.
polluted
usual
wasteful
water
Practice
Complete the sentences.
A ________ is a box that you keep your lunch in.
lunchbox
1. A __________ is a card that you write on one side of and send to
someone by post.
2. A __________ is a room where you have classes at school.
3. A __________ is a book that has one or more stories for children.
4. A __________ is a black board that is used at school for writing on
with chalk.
postcard
classroom
storybook
blackboard
Practice
1. Both of the books were ________ to her and she couldn’t decide which
one to buy.
2. How ________ of John to break the cup!
3. I’m afraid that it’s __________ for us to get there before eight.
4. The sun ___________ behind the clouds and it began to rain.
5. I’m sorry to say your answer is __________. Please try again.
6. It’s not easy to become a ___________ actor.
helpful
careless
correct possible appear
help success care
impossible
disappeared
incorrect
successful
Exercise
英语中常见的构词法：
1.合成法
2.派生法 （加前缀、后缀）
3.转化法 （词性变，词形不变）
Summary
Homework
复习构词法，整理本节课所学前缀和后缀。
Goodbye！