人教版2025春八年级下册英语Unit7 What's the highest mountain in the world?Section A 4a-4c课件(共35张PPT)

(共35张PPT)
Section A 4a-4c
What’s the highest mountain in the world
Unit7
Learning Objectives
Students can learn about key words & phrases:
ocean, the Pacific Ocean, as...as, any other.
Students can master the usage of superlatives,comparatives and “as+原级+as”.At the same time,they can use them to compare different things,like two cities or two animals
in different aspects.
1.吸入
2.做某事是怎么样……
3.到达山顶
4.冒着生命危险
5.主要原因之一
6.挑战自己
7.在困难面前
8.放弃做某事
9.实现我们的梦想
10.自然的力量
take in
It’s+adj+(for sb.)to do sth.
reach the top
risk one’s life(lives)
challenge oneself
in the face of difficulties
give up doing sth.
achieve our dreams
the forces of nature
one of the main reasons is that从句
Review
原级
比较级comparative
最高级 superlative
形
容
词
和
副
词
的
三
个
等
级
两者间“一样……”
两者比“更……”
三者比“最……”
2
3
1
形容词，副词的原级
两者进行比较，表示“一方与另一方一样……，用“as+原级+as”的结构，否定也可用“not as/so+原级+as”的结构。
He runs as fast as you.
他和你跑得一样快。
A+动词+as+副词原级+as +B
他和你一样勤奋。
He is as hard-working as you.
A+be+as+形容词原级+as +B
英语不如科学那么难。
English is not so/as difficult as science.
not + so (as) +原级+as（不如…那样）
What’s the highest mountain in the world Qomolangma.
How high is Qomolangma It’s 8,848.86 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.
Underline the superlatives and comparatives
规则变化
形容词，副词的比较级和最高级
①直接加-er 或 -est
tall—________—______ long—_______— ________
taller tallest
longer longest
②以不发音的字母e结尾的单词直接加-r或 -st
nice—_____— ____
nicer nicest
③以“辅音字母加y” 结尾， 把y变i，再加-er或-est
heavy—_______— ________
heavier heaviest
④重读闭音节（末尾只有一个辅音字母）双写辅音字母
再加-er或-est
big—_______— ________
bigger biggest
⑤部分双音节词和多音节词 分别在原级前加more构成比较级
和most构成最高级
slowly—_____________— _______________
beautiful—__________________— ____________________
more slowly the most slowly
more beautiful the most beautiful
原级 比较级 最高级
good\well
bad\badly
many\much
little
old
far
不规则变化
Tip:older 一般指年龄大小； My father is older than my mother.
elder指长幼关系（一般修饰名词作定语）;
My elder brother is a driver.
better
best
worse
worst
more
most
less
least
older\elder
oldest\oldest
farther（更远）
further（进一步的）
farthest\furthest
形容词，副词的比较级
当两个人或两件事物进行比较时，形容词和副词要用比较级，也就是词尾-er形式，比较级常常用than（标志）来连接被比较的两个人或事物。
comparative
两者进行比较，表示“一方比另一方更……”基本句型：
A modern train is faster than a car.
Tom jumps higher than Jack.
形容词，副词的比较级
comparative
1. A + be + 形容词比较级 + than + B
2. A+实义动词+副词比较级+than + B
2. 主语+谓语+the+比较级+of the two “主语是两者中较…的一个”
杰克是兄弟二人中较瘦的一个。
Eg:Jack is the thinner of the two brothers.
3. 比较级+and+比较级… “越来越…”
越来越好， 越来越高
越来越美丽， 越来越外向
better and better, taller and taller.
more and more beautiful\outgoing
我们的国家正变得越来越强大。
雪正下得越来越大。
Our country is becoming stronger and stronger.
It is snowing more and more heavily.
4.当表示一方超过另一方的“程度”时，可以用much, a lot,even, far,
a little, a bit（相差程度小）, 等来修饰形容词比较级。注意：比较级不能用very, so, too等修饰。
He is much more serious than his brother.
巧学妙记：两多(much, a lot)两少(a little, a bit)一甚至(even)，还有一个远（far)去了。
他比他的哥哥严肃多了。
He came to school a little earlier than Jack.
他来学校比Jack 早一点。
5. the+比较级（+名词）+主+谓，the+比较级（+名词） +主+谓
“越…就越…”
你学习越努力，你越能取得好成绩。
The harder you study, the better grades you will get.
你吃得越多，你就会越胖。
The more you eat, the fatter you will be.
Tip:此结构在于表达前者是后者实现的条件，
可尝试在写作中使用该结构，作为亮点。
6.less＋（多音节和部分双音节原级）＋than + B “A不如B...”
The book is less interesting than that one.
这本书不如那本书有趣
7.比较对象必须一致。
yours相当于your hair
My hair is longer than yours.
形容词，副词的最高级
形容词、副词的最高级用于三个或三个以上的人或事物之间的比较，常用of/in短语来说明比较的范围。
superlative
1.主语+ be+ the+形容词最高级+in/of ...
2.主语+实义动词（+the）+副词最高级+in/of ...
3.主语+be+ one of the+形容词最高级+可数名词复数+in/of ...
The Yangtze River is the longest river in China.
Tom works (the) hardest in Class 3.
Hangzhou is one of the biggest cities in China.
The Yellow River is the second longest river in China.
4.主语+be + the+序数词+形容词最高级+可数名词单数+in/of短语
Lucy is my/Linda’s best friend.
Tip：当最高级前有名词所有格和物主代词时，the要去掉。
5. Which / Who … + 最高级， A, B or C
该结构意为“A，B，C中，哪个 / 谁最……？”。
Which is the biggest, Beijing, Shanghai or Guangzhou
How high is Qomolangma It’s 8,848.86 meters high. It’s higher than any other mountain.
Did you know that China is one of the oldest countries in the world Yes, I did. It’s much older than the US.
Compare two sentences
相同点：两句都是含有than的比较级句型；
不同点：第一句比较级形式表达最高级含义；第二句只是
表达两者比较。
方框中的句子有何异同？
用法：比较级形式表最高级含义。（比较双方属于同一范围内）
a. 比较级＋than＋any other＋单数名词+范围
eg:He is taller than any other boy in his class.
b. 比较级 ＋ than＋the other＋复数名词+范围
比较级 ＋ than＋the rest of ＋ 复数名词+范围
eg:She is thinner than the other girls /the rest of girls in her class.
比较级形式表最高级含义。（比较双方不属于同一范围内）
比较级 ＋ than＋any＋单数名词+范围
eg:Shanghai is more modern than any city in Xinjiang.
1. My brother has ____ books than I.
A. much B. more C. many D. most
2. The more you smile, the _____ you will feel.
A. happy B. happier C. happily D. more happily
3. I know you are shorter than your brothers,but you run _________.
A. more faster B. fastest C. more fast D. fast
4. Mr Smith thought the Century Park was the second _____ in Shanghai.
A. large B. larger C. largest D. very large
5. I think English is as ____ as maths.
A. important B. more important C. most important D. importanter
B
B
C
A
B
Exercises
一、单项选择
1.I jumped ______(high )than Bill in the sports meeting last year.
2.Of all the drinks, tea is _________(old) in the world. It has 5,000 years of history in China.
3.Mr. Smith thought the Century Park was _______ (large) than any other park Shanghai.
4.The _______(busy)he is, the ________(happy)he will feel.
5.I think English is as __________(important) as science.
6.What do you think of the dress
Wonderful. I don't think I can find a ______(good)one.
higher
the oldest
larger
busier
happier
important
二、用所给单词的正确形式填空
better
Exercises
1. China is _______ (large) than any other country in Asia.
2. Our city is becoming more and more _________ (beautiful).
3. The _____ (much) we do for the old people, the _______ (happy) we’ll be.
4. My brother is the ______ (tall) of the two boys in the picture.
5. Her bedroom is twice _________ (big) than mine.
6. Mrs. Smith looks much __________ (young) with her new hairstyle.
7. China is one of __________________(ancient) countries in the world.
8. The Yellow River is the second ________ (long) river in China.
三、用括号中所给单词的适当形式填空
taller
larger
beautiful
more
happier
longest
bigger
younger
the most ancient
How high is Qomolangma It’s 8,844.43 meters high.
1.观察并总结：
8.844 43 meters high
______+______+_____________(long, high, wide, deep…）构成的；
提问时要用how+形容词+谓+主。
2.练一练：
(1)2500米深 ____________________
(2)35千米宽 ____________________
(3)6671千米长 ____________________
基数词
量词
长\高\宽\深
2,500 meters deep
2,500 meters in depth
35 kilometers wide
35 kilometers in width
6,671 kilometers long
6,671 kilometers in length
如何对物体的长度、高度、宽度和深度提问？
④问深度：How deep is.
What’s the depth of.
① 问长度：How long is .
What’s the length of.
② 问高度：How high is .
What’s the height of.
③ 问宽度： How wide is .
What’s the width of.
4a
Fill in the blanks with the correct forms of the words in the box.
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.
3. No ocean in the world is as ________ as the Pacific Ocean.
4. Although Japan is _______ than Canada, it is ________ smaller.
big
much
popular
long
old
high
longest
longer
high
popular
big
older
much
太平洋
n. 大海，海洋
Make comparisons according to the table.
the Nile River the Amazon River the Yangtze River the Yellow River
6,671 km 6,480 km 6,300 km 5,464 km
The Nile River is the longest river in the world.
The Amazon River is the second longest river in the world.
The Amazon River is a little longer than the Yangtze River.
The Nile River is much longer than the Yellow River.
4b
Write two comparisons about two topics. Write true facts.
e.g. Two rivers: the Yangtze River and the Amazon River
The Yangtze River is almost as long as the Amazon River.
The Amazon is longer than the Yangtze, but the Yangtze is the longest river in China.
Two animals: _______ and ________
1. _______________________________
2. _______________________________
Two cities: __________ and ___________
1. _______________________________
2. _______________________________
elephant
Shanghai is bigger than Hong Kong and it has a larger population than Hong Kong.
Hong Kong is as modern as Shanghai.
Hong Kong Shanghai
lion
An elephant is bigger than a lion.
A lion is shorter than an elephant, but it runs faster than an elephant.
策略：可以比较城市的面积、人口、历史等
策略：可以比较动物的身高(身长)、体重、奔跑速度、外貌特征以及寿命等
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
形容词和副词的原级
构成
肯定
否定
be+as+形容词原级+as
v+as+副词原级+as
not as/so+原级+as
Summary
形容词和副词的比较级
构成
规则变化
不规则变化
加后缀 -er
前面加 more
用法
A+be/v+比较级+than B
主语+谓语+the+比较级+of the two
比较级+and+比较级…more and more....
much, a lot,even, far, a little, a bit, 等来修饰形容词比较级
the+比较级....，the+比较级......
Tip：比较对象必须一致
less+多音节/部分双音节+than....不如
Summary
形容词和副词的最高级
构成
规则变化
不规则变化
加后缀 -est
前面加 most
用法
the+最高级+in/of短语
one of the+最高级+可数名词复+in/of短语
the+序数词+最高级+可数名词单+in/of短语
Which/Who…+最高级, A, B or C
【特别提醒】最高级前有物主代词、名词所有格等修饰时，其前不加the。
Summary
Tip:副词最高级前可省略the
比较级表示最高级
比较级+than any other+可数名词单数+范围
比较级+than the other+可数名词复数+范围
比较级 ＋ than＋the rest of ＋ 可数名词复数+范围
同一范围
非同一范围
比较级 ＋ than＋any＋ 单数名词+范围