牛津译林版八年级上册Unit 4 Do it yourself第6课时教学课件(共15张PPT)

(共15张PPT)
Unit 4 Do it yourself
Study skills
happy
unhappy
not happy
Warming-up
What does the emoji mean
Look and say
untidy
possible
impossible
happy
unhappy
active
inactive
Opposites
tidy
prefixes
前缀
We can add _____________________ before an adjective to express the opposite meaning.
“un-”, “im-”, “in-”
Presentation
For most of the adjectives, we add “un-” to make it opposite.
friendly
happy
comfortable
certain
tidy
able
fair
lucky
usual
unfriendly
unhappy
uncomfortable
uncertain
untidy
unable
unfair
unlucky
unusual
Rules
Presentation
If the adjective begins with “p”, we usually add “im-” before it.
pleasant
polite
possible
patient
possible
unpleasant
impolite
impossible
impatient
impossible
Presentation
Rules
expensive
correct
active
direct
inexpensive
incorrect
inactive
indirect
But some adjectives are special. You should add “in-” before them to make the opposite meaning.
Rules
Presentation
1. ____ friendly 2. ____ happy
3. ____ correct 4. ____ polite
5. ____ comfortable 6. ____ expensive
7. ____ healthy 8. ____ possible
9. ____ tidy 10. ____ certain
11. ____ patient 12. ____ able
un
un
un
un
un
un
un
im
im
im
in
in
Practice
Change the words into their opposite forms by adding prefixes
1. Annie: Do you spend a lot of time doing outdoor sports
Simon: Sure. It’s usual for me to stay at home all day.
2. Sandy: Our neighbour next door is putting something on the wall.
Mum: It’s possible to sleep with all that noise.
unusual
impossible
Add the correct prefixes to some adjectives so that all the sentences make sense
Practice
3. Millie: Are you able to fix your bicycle, Andy
Andy: Sorry, I’m certain about how to do that.
4. Mum: Suzy, your room is really tidy—things
are all over the floor.
Suzy: Sorry, Mum. I’ll tidy up right now.
uncertain
untidy
Practice
1. It is imcorrect to read someone else’s letter.
2. David often says bad words to others, so he is inwelcome.
3. It’s infriendly to throw stones at birds.
incorrect
unwelcome
unfriendly
Correct the mistakes
Practice
Discuss
How should we behave in class or in school
We should be _____________ to others.
We should be ______________ to the classmates in need.
We should not be _________ in sports.
We had better not make our classroom ______.
We had better not wear _________________ clothes at school.
friendly/kind
patient/helpful
inactive
untidy
untidy/uncomfortable
Extension
Tommy and Leo are twin brothers. They look so much alike that people are 1. _______ to tell them at first sight.
If one knows them well, it’s easy to tell them apart.
Tommy likes smiling. He is patient and willing to help others. However, Leo looks 2.________, for he 3. ___________ smiling and never greets others. When his classmates ask him questions, he is 4. _________ and 5. __________ to answer them. It is 6. _______________ for Leo to behave that way. Leo looks 7. ________________________because no one wants to make friends with him. He thinks it is 8. __________ for his classmates to treat him so coldly.
If Leo stops doing those 9. _________ things, people will find it 10. _____________ to differentiate Leo and Tommy.
unfriendly
unhappy/uncomfortable
impolite/incorrect
unfair
dislikes
impatient
unwilling
unable
improper
impossible
Fill in the blanks with adjectives with prefixes un-, in-, im- and dis-
Extension
1. For most of the adjectives, we add “un-” to make it opposite.
unkind, unhappy, unlucky …
2. If the adjective begins with “p”, we usually add “im-” before it.
impossible, impolite …
3. Some adjectives are special. You should add “ in-” before them to
make the opposite meaning.
incorrect, inactive …
Summary
Homework
1. Remember all the negative prefixes.
2. Try to find out some other negative prefixes.
3. Preview Task.
Thank you!