(共25张PPT)
Unit 3 Computers
Oxford English
Grammar
Warming-up
Yao Ming is ____________Lin Shuhao.
Lin Shuhao is ____________Yao Ming.
taller than
shorter than
taller
shorter
than
￥ 50.00
￥ 100.00
The white bag is __________________ the green one.
The green bag is ____________ the white one.
cheaper than
more expensive than
cheaper
more expensive
than
Grammar
A.形容词比较级
The comparative of adjective
When we compare two people or things, we can use the comparative of adjectives. we form the comparative of adjectives like this:
adj. Comparative of adj.
cheap cheaper
tall taller
interesting more interesting
expensive more expensive
Work out the rule
To form the comparative of adjectives , we often add ______to short adjectives and use ________with long adjectives
We often use ________after the comparative of adjectives.
er
more
than
tall — taller smart—smarter
short — shorter high — higher
fast --- faster
2) 以不发音的字母e 结尾的，加-r
nice — nicer large — larger
fine — finer late — later
1) 一般单音节词在词尾加-er
形容词的比较级规则变化:
3)重读闭音节以一个辅音字母结尾的，先双写辅音字母，再加-er。
big — bigger fat — fatter
thin — thinner red — redder
hot — hotter wet— wetter
4)以辅音字母+y结尾的双音节词，先改y为i，再加-er。
happy—happier early— earlier
funny—funnier easy — easier
5)多音节词和部分双音节词的比较级要在前面加more
important— more important
delicious — more delicious
expensive — more expensive
outgoing — more outgoing
tired — more tired
serious — more serious
slowly--- more slowly
写出下列形容词的比较级
old__________ young________
tall_______ long________
short________ strong________
big________ small_______
fat_________ thin__________
heavy______ light________
interesting_________
friendly __________
older
younger
taller
longer
shorter
stronger
bigger
smaller
fatter
thinner
heavier
lighter
more interesting
Exercise
friendlier
big expensive heavy light small
Salesman: Can I help you, sir
David: Yes, I needa suitcase. Can
you tell me about these two
Salesman: Sure. The red one costs￥2500,
and it’s made of leather.
David: I see. The red one is ____________
than the black one. What about the
weight Which one is___________
more expensive
lighter
A Complete the conversation below and on page 40 with
the comparative of adjectives.
Salesman: The black one. It’s made of plastic.
Try them, sir.
David: You’re right. The red one is _______
than the balck one, and it’s _______
than the black one.
Salesman: Do you have a lot of things to carry
David: Yes, I do. I’ll have the black one
because it’s __________ than the
red one.
Salesman: Thank you very much, sir.
heavier
smaller
bigger
big expensive heavy light small
Linda
Nancy
Kate
Linda is the tallest girl of the three.
Kate is the shortest girl of the three.
Presentation
the tallest
the shortest
￥ 50.00
￥ 100.00
￥ 150.00
The purple bag is __________________ one of all the bags.
The green bag is ____________ one of all the bags.
the cheapest
the most expensive
the cheapest
the most expensive
B.形容词最高级
The superlative of adjective
Grammar
When we compare more than two people or two
things , we use the superlative of adjectives.We
form the superlatives like this:
Adjectives Superlative of adjectives
high the highest
careful the most careful
interesting the most interesting
Work out the rule
To form the superlative of adjectives , we often add ______to short adjectives and use ________with long adjectives
We often use ________in front of the superlative of adjetives.
est
most
the
构 成 方 法 原 级 比 较 级 最 高 级
单音节词和少数多音节词 一般在词尾加-er/ /或-est/ist/ cold colder coldest
fast faster fastest
以字母e结尾的形容词，加-r或-st nice nicer nicest
large larger largest
重读闭音节词只有一个辅音字母时，应先双写辅音字母；再加-es或-est big bigger biggest
hot hotter hottest
以“辅音字母+y”结尾的双音节词，先改“+y”结尾的双音节词，先改“y”为“i”,再加-er或-est easy easier easiest
early earlier earliest
多音节词和部分双音节词 在词前加more或most tired more tired most tired
easily more easily most easily
形容词比较级和最高级的构成
不规则变化
形容词比较级和最高级的构成
不规则变化
形容词比较级和最高级的构成
不规则变化
形容词比较级和最高级的构成规则变化
原级 比较级 最高级
good / well better best
bad / badly/ill worse worst
many / much more most
little less least
far farther farthest
further furthest
old older olderst
elder elder
形容词比较级和最高级的构成
不规则变化
(1)___(2)___
(3)___
David: I’d like to see some of your cameras.
Salesman: Certainly. This is the most expensive model.
This is the cheapest model.
This is the newest and lightest model.
a
b
c
B1 David is shopping for a camera. Look at the photos and write the letter of the correct model after each statement.
Tony: Did they show you any cameras
David: Yes. The (1)______________model is
(2)____________________________.
The (3)_______________model costs (4)_____________.
The (5)_______________model was made in (6)_______.
The (7)_________model weighs (8)______________.
expensive light old small
smallest
99.8 mm x 56.4 mm x 24.5 mm
most expensive
oldest
lightest
3,589
2010
170 g
B2 David told his friend Tony about his shopping trip.
Complete David’s sentences with the superlative of
the adjectives from the box.
形容词比较级的几种用法
1. A is + adj.+er +than B .(两者）
Jim is taller than Mike.
2. 比较级前面可以有much（多）,a little（一点）, a lot（一点）, even（甚至）等修饰语强调比较程度。
Jim is much taller than Mike.Jim比Mike高得多。
3.数量+比较级+than
Jim is10cm taller than Mike.Jim比Mike高10厘米。
4.比较级+比较级，表示 “越来越……”
hotter and hotter越来越热
more and more beautiful越来越漂亮
5. the+比较级，the+比较级 表示 “越…就越…”
The harder you work, the better you will be.
你越努力，你就越优秀。
常见句型
1. A is the adj.+est of / in …..（三者或三者以上）
Jim is the tallest boy in Class 3.
= Jim is taller than the other boys in Class 3.
= Jim is taller than any other boy in Class 3.
2. the + 序数词 + 形容词最高级 + 名词 + in/of
表示“第几最…”
Mike is the second tallest boy in Class 3.
3. one of + the+形容词最高级+名词复数+in/of
表示“最…之一”
Jim is one of the tallest boys in Class 3.
拓展
形容词最高级的几种用法
常见句型
Exercise
1. —Which is_________ season in Beijing
—I think it's autumn. ［2003 北京］
A.good B.better C.best D.the best
2.The Changjiang River is ____ than any other river in China.
A. shorter B. longer C. shortest D. longest
3.--- Which subject is _____ , physics or chemistry
A. interesting B. most interesting
C. more interesting D. the most interesting
D
B
C
4.________people you help, ________ you
will be.
A .More; happier B. Many; happy
C .The more; the happier D. The many; the happy
5.The Yellow River is _______ river in China.
A. the second longest B. the second longer
C. second longest D.second longer
C
A
Better later than never.
Facts(事实）speaks louder than words.
Enough is better than too much.
Two heads are better than one.
亡羊补牢，犹未晚矣。
事实胜于雄辩。
知足常乐。
三个臭皮匠顶个诸葛亮。
英语谚语中的比较级登陆21世纪教育 助您教考全无忧
Unit3 Computers
Grammar同步练习
英语中的形容词通常用三种形式来表达事物的等级差别，分别是原级、比较级和最高级。
一、比较级和最高级的构成
大部分形容词的比较级和最高级是通过变化词尾来实现的，属于规则变化，但也有少数是不规则变化。
1. 规则变化
单音节和少数双音节形容词变化规则如下：
1）单音节词末尾加-er（比较级），-est（最高级）
【例】 原级 比较级 最高级
great greater greatest
small smaller smallest
clean cleaner cleanest
2）单音节如以e结尾，只加-r（比较级），-st（最高级）
【例】 fine finer finest
nice nicer nicest
wide wider widest
3）以一个辅音字母结尾的重读闭音节单音节词，须先双写这个辅音字母，再加-er（比较级），-est（最高级）
【例】 big bigger biggest
hot hotter hottest
fat fatter fattest
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4）以“辅音字母+y”结尾的双音节词，将y变为i， 加-er（比较级），-est（最高级）
【例】 happy happier happiest
easy easier easiest
heavy heavier heaviest
funny funnier funniest
5）其他双音节词和多音节词在词前加more（比较级），most（最高级）
【例】tired more tired most tired2·1·c·n·j·y
interesting more interesting most interesting2-1-c-n-j-y
difficult more difficult most difficult【来源：21cnj*y.co*m】
2. 不规则变化
形容词的不规则变化如下：
原级 比较级 最高级
good/well better best
bad/ill worse worst
little/ few less least
much/many more most
far farther更远的（只指距离) further 更远的（指距离）；更深入的（指程度） farthest;furthest
old older 较老的，较旧的；长辈的(指年龄、新旧、血缘）；elder长辈的（只指血缘） oldest;eldest
比较级和最高级的用法
（一）形容词比较级的几种用法
1. A is + adj.+er +than B .(两者）
Jim is taller than Mike. Jim比Mike高。
2. 比较级前面可以有much（多）,a little（一点）, a lot（一点）, even（甚至）等修饰语强调比较程度。21世纪教育网版权所有
Jim is much taller than Mike. Jim比Mike高得多。
3.数量+比较级+than
Jim is10cm taller than Mike. Jim比Mike高10厘米。
4.比较级+比较级，表示 “越来越……”
The weather becomes hotter and hotter.天气变得越来越热。【来源：21·世纪·教育·网】
She is more and more beautiful.她越来越漂亮。
5. the+比较级，the+比较级 表示 “越…就越…”
The harder you work, the better you will be.
你越努力，你就越优秀。
（二）形容词最高级的几种用法
1. A is the adj.+est of / in …..（三者或三者以上）
Jim is the tallest boy in Class 3. Jim在三班男孩中最高。www.21-cn-jy.com
= Jim is taller than the other boys in Class 3. Jim比三班其他男孩子都要高。
= Jim is taller than any other boy in Class 3. Jim比三班其他任何男孩都要高。
2. the + 序数词 + 形容词最高级 + 名词 + in/of
表示“第几最…”
Mike is the second tallest boy in Class 3. Mike在三班男孩子中第二高。
3. one of + the+形容词最高级+名词复数+in/of
表示“最…之一”
Bob is one of the tallest boys in Class 3. Bob是三班高个子男孩之一。
写出下列单词的比较级和最高级形式
1. tall______ ________ 2. busy ______ _______ 3. thin ________ ________
4. many _____ _____ 5. slow ________ _____ 6. delicious _________ ______
7.expensive _________ _________ 8.good ______ ________
9.far _________ _________ 10.heavy _________ _________21教育网
二、单选
（ ）1. Most of the people in Guangdong are getting ______.
A. more and rich B. more rich and more rich
C. richer and richer D. rich and rich21·世纪*教育网
（ ）2.Tom is one of _______ boys in our class.
A. tallest B. taller C. the tallest B. the tall
21*cnjy*com
（ ）3.- Which is__________ , the sun, the moon or the earth 【出处：21教育名师】
-- Of course, the moon is.
A.small B.smaller C.smallest D.the smallest【版权所有：21教育】
（ ）4.I’ve got quite a ( http: / / www.21cnjy.com" \o "欢迎登陆21世纪教育网 ) few dictionaries. Among them, this English dictionary is ____. (2013 重庆市)21教育名师原创作品
A. much useful B. more useful
C. the most useful D. a little useful 21*cnjy*com
（ ）5.Mobile phones are very popular now and they are _____ than before.
A. cheap B. cheaper C. cheapest D. the cheapestwww-2-1-cnjy-com
（ ）6.Which do you like _______, tea or coffee
A. well B. better C. best D. most
（ ）7. She is ________ than ________ .
A. busier；us B. busier ;we C. more busy; us D. more busy ; we
（ ）8.Who jumped_______of all
A. far B. farther C. farthest D. the most far
（ ）9. The Changjiang River is ____ than any other river in China.
A. shorter B. longer C. shortest D. longest
（ ）10.________people you help, ________ you will be.
A .More; happier B. Many; happy
C .The more; the happier D. The many; the happy
三、用适当形式填空。
1. She is_______ than all the other students. (young)
2. My sister is two years _______ (old ) than I.
3. Which is _________ (heavy), a hen or a chicken
4. Question A _______ ________ _________ ________ Question B. (important)
5. Of all the fil ( http: / / www.21cnjy.com" \o "欢迎登陆21世纪教育网 )ms, Tiny Times may be _________ (popular) among the young people.
6. Work harder, and you’ll be ____ (good) at it than before.21·cn·jy·com
7. Jack is the _______ (thin) of the two boys.
8. I haven’t seen you for a long time. You look much ______________ (health)
9. The test was so difficult that half of the class made ______________ marks than usual. (bad)
10. He is one of the_________(friendly) people in the class, I think.
Unit3 Computers
Grammar同步练习
答案
一、1. taller tallest 2. busier busiest 3. thinner thinnest
more most 5. slower slowest 6. more delicious most delicious
7.more expensive most expensive 8.better best
9.farther/further farthest/furthest 10.heavier heaviest
二、1-5 CCDCB 6-10 BACBC
三、1.younger 2. older 3.heavier
4.more important 5.the most popular
6.better 7.thinner 8.healthier
9.worse 10.friendliest
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