外研版必修1 Module 5 A Lesson in a Lab Grammar课件（40张ppt）

(共40张PPT)
1. 原级比较：两者程度相同。用句型as+
形容词/副词+as表示, 否定名式为: not
as/so+形容词/副词as。
e.g. Anne is ________ his brother.
安与他的哥哥一样高。
I have never seen a person
__________________
我从没见过哪个人跟他一样聪明。
形容词和副词比较等级的用法
as tall as
as / so clever as he is.
2. 比较级：
A. 表示A超过B。此时用形容词和副词的比较级。
e.g. ________________________________
我们的教室比你们的更明亮。
I don’t think math is more important than physics.
__________________________
Our classroom is brighter than yours.
我不认为数学比物理更重要。
B. 表示A不如B。 句型：less+形容词
/副词原级。
e.g. Rabbits ___________ than dogs.
兔子不如狗跑得快。
It rains ________ here in autumn
than in spring.
这里秋季的雨天不如春季多。
ran less fast
less often
3. 形容词和副词比较级的特殊用法
越来越……
比较级+ and+比较级
e.g. You are growing ______________.
你越长越高了。
English is becoming more and more
important.
_________________
taller and taller
英语越来越重要了。
B. 越……， 就越……
the +比较级+ the +比较级
e.g. _______________ you are, the better you will do in the exam.
你越细心，就会考得越好。
The more you practice,
____________________________
你练得越多，讲得就越流利。
The more careful
the more fluently you will speak.
C. 表示两者之中比较……的一个，用 of 引导，比较级前加上the。
e.g. Jack is ___________ the two brothers.
杰克是兄弟两中较高的一个。
This is ___________ the two rooms.
这个房间是两个中较大的一个。
the taller of
the bigger of
D. no more than表示“只；不超过；不
多于”，相当于only。
e.g. His whole school added up to
____________________
他所接受的学校教育不过一年。
She has ____________________ in her pocket.
她兜里只有一块钱。
no more than one year.
no more than one yuan
E. no more…than 表示“……一样不……”；而not more…than则表示“不像……那样”，相当于“not so …as”。
e.g. Hs is feeling ____________ yesterday.
他觉得不比昨天好多少。
no better than
She is not more generous than her younger sister.
她不如她妹妹那样慷慨大方。
She is ________________ her younger sister.
相当于：
not so generous as
F. no less than表示“多达，……那样多; 至少, 起码”, 相当于as much /many as, 蕴含这个数是大的；而not less than表示“不少于”, 不强调这个数的大小, 只说明数据本身。
e.g. I have ________________________.
我起码有10本字典。（至少）
no less than ten dictionaries
I have not less than ten dictionaries.
_____________________
（不含“我的词典多”的意思，只说明一个事实。）
G. no less …than表示“不比……差；与……同样地”， 相当于“as …as”。
e.g. She is ___________________ her
sister.
她和她的姐姐一样漂亮。
我有的词典不少于10本。
no less beautiful than
H. 不用比较级的形容词如：senior, junior, superior, inferior等。
e.g. He is three years ___________
他比我大三岁。
Your knowledge of electronics is
____________________
你对电子学的知识远远超过我。
senior to me.
much superior to mine.
I. 比较级的修饰语。通常为副词或短语，置于比较级前面， 说明比较级的程度。a little, little, a bit, bit, a lot, a great deal, much, far, rather, slightly, by far, even, still, nearly, almost, any, just, (…) times等。
e.g. The moon is much smaller than the earth.
The result of the experiment turned out to be even better than expected.
Speak a bit more slowly, please.
The output of the paper mill is three times higher than it was last year.
Make sentences about the comparative sizes of the pairs. Use the words in the brackets.
Yangtze River
Songhua River
6,300 kilometers
2,309 kilometers
long/length
Example:
A: The Yangtze River is about three
times as long as the Songhua River.
B: The Yangtze River is about three
times longer than the Songhua River.
C: The Yangtze River is about three
times the length of the Songhua River.
Winter in Harbin
Winter in Beijing
-20℃
-5℃
(cold/coldness)
A: Winter is four times as cold in Harbin
as in Beijing.
B: Winter is four times colder in Harbin
than in Beijing.
C: Winter in Harbin is four times the
coldness of in Beijing.
Mount Tai
Mount Qumolangma
1521m
8848m
(high/height)
A: Mount Qumolangma is about six
times as high as Mount Tai .
B: Mount Qumolangma is about six
times higher than Mount Tai .
C: Mount Qumolangma is about six
times the height of Mount Tai .
my house
my aunt’s house
large/size
80 square meters
160 square meters
A: My aunt’s house is twice as large as my house.
B: My aunt’s house is twice larger than my house.
C: My aunt’s house is twice the size of my house.
Lily weighs
Tom weighs
45 kilograms
90 kilograms
heavy/weight
A: Tom weighs over twice as heavy as Lily.
B: Tom is over twice heavier than Lily.
C: Tom is over twice the weight of Lily.
②倍数+形容词比较级
+than …
③倍数+the (size, height,
length, weight, width,
depth, age) +of …
①倍数（half, once,
twice,…times）+ as +
形容词+as
Use the words below to write sentences as in the examples.
Example:
temperature / get / low
The temperature gets lower and lower.
1. hot metal / get / big
The hot metal is getting bigger and
bigger.
2. magnesium / get / hot
The magnesium is getting hotter and hotter.
3. sun / get / strong during the morning
The sun is getting stronger and stronger during the morning.
4. sea / become / warm
The sea is becoming warmer and warmer.
Underline the comparative
expressions.
B. Circle the adverbs used to give
more information about the
comparative expressions.
Look at the following sentences, and:
1. Come a bit closer.
2. We need rather more than that.
3. It weighs a little more than before.
4. It’ll be a lot heavier than magnesium.
5. Is it any heavier
6. We need a piece which is (very) much bigger than that.
Compare the items / people you know. Use one of these expressions.
Example: Two lessons
The physics lesson was a lot more
interesting than the chemistry lesson.
a little a bit a lot rather no any (very) much lots
1. Debbie长得很快，她个子越来越高。
Debbie is growing fast. She’s getting ______________.
2. 我们图书馆藏书的数量是你们图书馆的四倍。
The books in our library are
______________ than those in yours．
Fill in the blanks.
taller and taller
four times more
3. 这本词典的厚度比你从图书馆借的那本厚4倍。
This dictionary is ________________ as the one you borrowed from the library.
four times as thick
4. 地球的体积是月球的49倍。
The earth is 49 times _________ the moon.
5. 天气越暖和，我感到越舒服。
___________ the weather is, ________ I feel.
the size of
The warmer
the better
每空填一词，使句子的意思相同或相近。
1. The newly-built bridge is two times as wide as that one.
The newly-built bridge is three times _____ _____ that one.
2. Mary weighs 50 kilogrammes, and Paul weighs 100 kilogrammes.
Paul is _____ _____ _______ than Mary.
two times heavier
wider than
3. I think that the city is more attractive than the suburb to young people.
I think that the suburb is _____ _________ ______ the city to young people.
4. Nigeria is about four times the size of Great Britain.
Nigeria is about four times ____ _____ ____ Great Britain.
as large
attractive than
less
as
Do exercises 1-4 on page 91.