人教新目标英语八年级下册Unit7SectionAgrammarfocus-4c课件PPT（共45张PPT）

(共45张PPT)
— What’s the highest mountain in the world
— Qomolangma.
— How high is Qomolangma
— It’s 8,844.43 meters high. It’s higher than any other mountain.
— Which is the deepest salt lake in the world
— The Caspian Sea is the deepest of all the salt lakes.
— Did you know that China is one of the oldest countries in the world
— Yes, I did. It’s much older than the US.
Can you translate the following sentences
长江大约长6,300千米。
The Yangtze River is about 6,300 kilometers long.
Can you translate the following sentences
黄河长5,464千米。
The Yellow River is 5,464 kilometers long.
Can you translate the following sentences
明朝的长城大约有8,850千
米长。
The Great Wall in Ming dynasty is about 8,850 kilometers long.
Can you translate the following sentences
珠穆朗玛峰高8,844.43米，
所以攀登起来很危险。
Qomolangma is 8,844.43 meters high and so is very dangerous to climb.
Now let’s try to translate the sentences below:
那个篮球运动员有两米高。
那条河只有两米深/宽。
这棵树有两米高。
那条河长两千米。
The basketball player is two meters tall.
The river is only two meters deep/wide.
The tree is two meters tall.
The river is about two kilometers long.
5. 这座山大约有两千米高。
6. 这个箱子大约有两米高/宽/长。
The mountain is about two thousand meters high.
The box is about two meters high / wide /long.
大多数形容词有三个级。
1. 原级:
Structure : as ... as... 像..….一样
e.g. Tim is as tall as Tom.
2. 比较级 (用于两者之间的比较):
Structure：形容词比较级＋ than ...
e.g. This box is bigger than that one.
3. 最高级(用于三者或三者以上的比较):
Structure:
the + 形容词的最高级＋of / in ...
e.g. Tom is the heaviest in our class. He is the most popular in our school.
3) 最高级(用于三者或三者以上的比较)，
常用结构:
the + 形容词的最高级＋of / in ...
He is the tallest of the three.
他是这三个人中最高的。 He is the funniest in his class.
他是他们班最有趣的。
规则变化
1) 一般情况下，单音节或双音节的形容词/副词比较级＋er， 最高级＋est。如:
clever — cleverer — cleverest
few — fewer — fewest
small — smaller — smallest 等。
2) 以e结尾的词，比较级＋r，最高级＋st 即可。 如：
nice — nicer — nicest
cute — cuter — cutest
large — larger — largest
3) 以辅音字母＋y结尾的变y为i＋er或est 如: easy — easier — easiest
happy — happier — happiest
再如：early, busy, heavy, dirty, lazy 也如此。
4) 重读闭音节，单辅音结尾的，双写这个辅音字母＋er 或 est的词：
① fat — fatter — fattest
② thin — thinner — thinnest
③ hot — hotter — hottest
④ red — redder — reddest
⑤ wet — wetter — wettest
⑥ big — bigger — biggest xk
5) 多音节和部分双音节的词需要在形容词
原级前＋more 构成比较级，＋the most 构
成最高级。如：
beautiful － more beautiful － the most beautiful
又如: delicious, popular, important, interesting, expensive, creative
双音节的词如: careful － more careful － the most careful useful － more useful － the most useful
少数单音节词也是这样，如：
pleased — more pleased — the most pleased
tired — more tired — the most tired
b) 不规则变化：
good — better — best
well — better — best
bad — worse — worst
many/much — more — most
far — farther —farthest (距离远)
far — further — furthest (程度深)
old — elder — eldest (长幼)
old — older — oldest (年龄)
三者或三者以上相比，表示最高程度时，用“the + 最高级”的结构表示。这种句式一般常有表示比较范围的介词短语。例如：
Zhang Hua is the tallest of the three.
He works (the) hardest in his class.
2. 最高级可被序数词以及 much，by far，nearly，almost，by no means，not quite，not really，nothing like 等词语所修饰。例如：
This hat is by far／much／nearly／almost／not nearly／by no means／not quite／nothing like the biggest. How much did the second most expensive hat coat
3. 表示“最高程度”的形容词，如 excellent，extreme，perfect等，没有最高级，也不能用比较级。
4. 形容词最高级修饰作表语或介词宾语的名词、代词时，被修饰的词往往省略。
e.g. He is the tallest (boy) in his class.
5. 作状语的副词最高级前可以不加定冠词。
e.g. Of all the boys he came (the) earliest.
比较级考点
① 比较级修饰问题 a little, a bit, even, still, much, a lot, far 等可修饰比较级。
e.g. Tom is a little taller than Jim. This book is much more interesting than that one.
② 同级比较
e.g. The weather in Beijing is colder than that in Xi’an. Our school is bigger than yours.
③ the + 比较级
e.g. Lucy is the fatter of the two girls.
④ “a/an + 比较级” 表示“又一，再一”
e.g. Lily has a doll, but she wants a bigger one.
⑤ 隐性比较（没有than的情况）
e.g. Who runs faster, Lucy or Lily You’d better come earlier next time. He worked hard last term, but he works even harder this term.
⑥ 越来越......
比较级 + and + 比较级
b. the + 比较级 + 句子，the + 比较级 + 句子
e.g. It’s getting colder and colder. The more you exercise, the better you are.
2. 最高级考点
说明：形容词的最高级前必须加the；副词的最高级前省略the。
① 范围问题
e.g. Tom is the tallest student in the class. Spring is the best season of the year.
② “......之一”问题
e.g. Beijing is one of the biggest cities in the world.
③ “the + 序数词 + 最高级”
e.g. I think he is the second tallest boy in his class.
3. 比较级和最高级的转换
e.g. Tom is the tallest student in the class.
= Tom is taller than any other student in the class.
= Tom is taller than all the other students in the class.
= No other students are taller than Tom.
总结：① any other + 名词单数
the other + 名词复数
② 否定 + 比较级 = 最高级
比较级 + 极限 = 最高级
同级比较
① as + adj./adv. + as
e.g. She is as thin as Lily.
He writes as carefully as Linda.
② not + as/so + adj./adv. + as
e.g. Tony didn’t run so fast as Carter.
1. Our family has bought a car so we can travel _____ than before.
most easily B. less easily
C. easily D. more easily
2. My father told me a story last night. It is ____ one I’ve ever heard.
the funniest B. funniest
C. funnier D. the funnier
D
A
3. The _____ friends you have, the ____ you will be.
A. more, happy B. many, happy
C. more, happier D. many, happier
4. When he heard a cry for help, he ran out as _______ as he could.
hardly B. quickly
C. finally D. slowly
C
B
5. This place is not big enough for Lucy’s birthday party. We should find a _____ one.
big B. small
C. bigger D. smaller
C
Fill in the blanks with the correct forms of the words in the box.
big much popular long old high
1. The Amazon River is one of the _______ rivers in the world. It’s a little _______ than the Yangtze River.
2. Qomolangma is 8,844.43 meters _____. It’s one of the most ________ places for serious mountain climbers.
longest
longer
high
popular
4a
3. No ocean in the world is as _____ as the Pacific Ocean.
4. Although Japan is _______ than Canada, it is _______ smaller.
big
older
much
太平洋
n. 大海；海洋
Write two comparisons about two topics. Write true facts.
Two rivers: _________________ and _________________
__________________________________________________________________________________________________________________________________________________________________________
4b
The Yangtze River is almost as long as the Amazon River.
The Amazon is longer than the Yangtze, but the Yangtze River is the longest river in China.
the Yangtze River
the Amazon River
4b
Write two comparisons about two topics. Write true facts.
Two cities: ___________ and ___________
1. ___________________________________
___________________________________
_____________________________________
Singapore Kuala Lumpur
Kuala Lumpur is as modern as Singapore.
2. Singapore is bigger than Kuala Lumpur and has a larger population than Kuala Lumpur.
Two animals: ___________ and _________
1. ___________________________________
2. ___________________________________
_____________________________________
Monkey Dog
A dog is bigger than a monkey.
A monkey is smaller than a dog, but it climbs a tree faster than a dog.
4c
Write five questions using comparisons. Then ask your partner your questions.
1. _______________________________________
2. _______________________________________
3. _______________________________________
4. _______________________________________
5. _______________________________________
What is the highest building in our city
What is the busiest subway station in our city
What is the largest shopping mall in our city
Which is the biggest park in our city
Which is the longest road in our city
1. She is ________ than ________.
A. busier / us B. busier / we
C. more busy / us D. more busy / we
2. Jane is ________ than Betty.
A. less taller B. less tallest
C. less tall D. not as tall
3. China is ________ country in the world.
A. the third largest B. the largest third
C. the third large D. a third largest
B
A
A
4. — Which is ____ season in Beijing
— I think it’s autumn.
A. good B. better C. best D. the best
5. — Which is ____, the sun, the moon or the earth
— The moon is.
small B. smaller
C. smallest D. the smallest
D
D
6. I study English as ____ as my brother.
A. hard B. harder C. hardest
7. Which is ____, a bicycle or a computer
A. expensive B. more expensive
C. the most expensive
8. The Yellow River is one of ______ rivers in China.
A. long B. longer C. the longest
A
B
C
1. To memorize the important phrases
and sentences.
2. To make some sentences using as … as,
... times … than, less than, more than