资源简介

Section A Grammar Focus
The Wonders of Nature
UNIT 4
通过本节课的学习，同学们将能:
1.掌握词汇的比较级、最高级变化规则并在语境中恰当运用；仿照示例写出用于比较地点的问题，提升用英语进行比较表达的能力。
2.通过自主阅读、分析教材中的句子和语篇，掌握形容词和副词比较等级的用法，提升自主学习能力。
3.通过了解世界上的沙漠等自然奇观，拓宽国际视野，增强对自然之美的欣赏与热爱;在分析句子中比较级、最高级的使用以及完成数字书写、语篇填空等任务时，培养逻辑思维能力。
What’s the highest mountain in the world?
Warming-up
Qomolangma is the highest mountain in the world.
Who knows most?
What’s the longest river in the world?
The Nile River is the longest river in the world.
What’s the deepest salt lake in the world？
The Caspian Sea is the deepest salt lake in the world.
What’s the tallest animal in the world？
Giraffe is the tallest animal in the world.
Which is the heaviest animal on the land(陆地上)?
The elephant (is the heaviest animal on the land).
What is the longest wall in the world?
The Great Wall of China (is the longest wall in the world).
Which country has the largest population(人口)?
India (has the largest population).
Read the sentences. Circle the adjectives which compare things.
Underline?the adverbs which compare?actions.
{5C22544A-7EE6-4342-B048-85BDC9FD1C3A}What is the biggest desert in the world?
It is the Sahara Desert.
How big is it?
It is about 9,000,000 square kilometres in size.
Where is the deepest point in the ocean?
It is in the Mariana Trench.
How deep is it?
It is about 11,000 metres deep.
Some deep-sea animals are blind, but they can “see” as well as others.
Mount Qomolangma is one of the greatest wonders of the world, and it is still growing taller.
The Yangtze River travels the farthest in China and is about 6,300 kilometres long.
4a
形容词和副词有三个等级：
原级：表示人或事物的基本特征（如tall，fast）。
比较级：用于两者之间的比较（如taller，faster）。
最高级：用于三者及以上的比较（如tallest，fastest）。
小结：形容词和副词有三个比较等级：①原级；②比较级；③最高级。
两者之间比较用比较级；（考试重点）
三者或者三者以上进行比较用最高级。（考试重点）
形容词和副词的比较等级
{93296810-A885-4BE3-A3E7-6D5BEEA58F35}构成方法
原级
比较级
最高级
单音节词和部分双音节词
high
higher
highest
fine
finer
finest
big
bigger
biggest
easy
easier
easiest
多音节词和部分双音节词
carefully
more carefully
most carefully
一般情况下，在词尾加-er或-est
以字母e结尾，词尾加-r或-st
“辅元辅”重读闭音节,双写末尾字母，再加-er 或-est
以“辅音字母+y”结尾，把“y”变为“i”，再加-er或-est
在词前加more或most
形容词比较等级的构成
巧学助记
比较级不规律, 一般词尾加-er；
词尾若是哑音e,直接加-r就可以；
重读闭音节,末尾须双写；
辅音字母后有y,变y为i加-er；
双多音节有规律,词前加more就可以。
最高级，很容易，一般词尾加-est。
词尾若有哑音e, 直接就加-st。
重读闭音节， 单辅音字母要双写。
辅音字母若加y, 记得把y变为i。
多音节，此前加上most。
最高级规则变化口诀
巧学妙记
{E8034E78-7F5D-4C2E-B375-FC64B27BC917}原级
比较级
最高级
good/well
many/ much
bad/ill/badly
old
far
better best
more most
worse worst
older/elder oldest/eldest
farther/further farthest/furthest
常用的不规则形容词比较级和最高级变化形式
1.This movie is as moving as that one.
小结：表示“和······一样”：as + __________________ + as
2.My sister is not as/so outgoing as me.
小结：表示“不如······”：not _________ +形容词或副词原级+ as
原级的用法
巧学妙记
同级比较用原级，as...as永不离。若是否定加not，后者总是强前者。
比较等级的用法
形容词或副词原级
as/so
比较级的用法（两者比较）
小结：比较级表示“更······”，用于两者之间的比较，说明“前者比后者更······”。基本结构为“_________________”。
A + be动词 + 形容词比较级 + than + B
A + 实义动词 + 副词比较级+ than + B
1.Tom is taller than me.
2.Tom runs faster than me (do).
Tips: than前后所使用的动词相同时，通常用助动词代替后面的动词或省略后面的动词。
比较级+than
最高级的用法（三者及以上比较）
1.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。
2.特点:形容词最高级前要加定冠词the，副词最高级前的the有时可省略。
例：Wang Lin is the tallest in our class.
This theater is the cheapest of the three.
语法口诀：最高级，有特征，the字加在前；in/of范围不能忘，比较对象要明确。
使用最高级时应注意：
1.表示“最······之一”的句式要用“ one of the +形容词最高级+复数名词”。
例：Jingjiang Hotel is one of the biggest hotels in our city.
Lisa is one of my best friends.
2.当最高级前面有物主代词或名词所有格时, 不加定冠词 the。
例：Tom is Lucy’s best friend.
Tuesday is her busiest day.
3.最高级前可加序数词。
例：The Yellow River is the second longest river in China.
4.形容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。例：He is the laziest (student) in our class.
【即时练】
一、用括号内单词的适当形式填空
1.This apple is _________ (sweet) than that one.
2.She studies ________ (hard) than her brother.
3.This story is ______________________ (interesting) in the book.
4.My mother gets up _________________ (early) in my family.
5.The weather is getting _______ and _______ (cold).
6.He runs ______ (fast) than I, but Tom runs ______________ (fast) in our class.
7.This box is _________ (heavy) than that one, but it’s not as ________ (heavy) as the red one.
8.The ________ (much) you practice, the _______ (good) you will speak English.
sweeter
harder
the most interesting
(the) earliest
colder
colder
faster
(the) fastest
heavier
heavy
more
better
二、单项选择
1.Which is ______, the sun, the moon or the earth?
A. big B. bigger C. biggest D. the biggest
2.This song is ______ than that one.
A. popular B. more popular C. most popular D. the most popular
3.He is not as ______ as his sister.
A. tall B. taller C. tallest D. the tallest
4.— Who runs ______ in your class?
— Tom does.
A. fast B. faster C. fastest D. the faster
5.The ______ you read, the ______ you will learn.
A. more; more B. much; much C. many; many D. most; most
D
B
A
C
A
Write or spell?out the?numbers.
1.Mount Kilimanjaro?is _______(five thousand, eight hundred and?ninety-five) metres high.
2._______(twenty-five thousand, seven hundred and sixty-eight) cubic metres of water pours down Inga Falls each second.
3.The East African Rift Valley is about 4,000 ( ____________ ) miles long.
4.The Taklimakan Desert has a total area of about 337,000
(_________________________________) square kilometres.
?5,895?
25,768
four thousand
three hundred and thirty-seven thousand
4b
4c
Complete the passage with the correct forms of?the words in the?box.
large amazing far close loud
My friends and I visited Victoria Falls in Africa last year.
Visiting one of the world's ___________ waterfalls was a magical experience. As we went ______ to the falls, the noise of the water slowly grew________ and louder.
Then, right before our eyes, the waterfall appeared. It went on for as _____ as the eye could see. Later, we sat in a special pool at the top of the falls. There, we felt the water rush past us and become a part of the waterfall. It was the scariest but also the _________________ experience of our trip!
largest
closer
louder
far
most amazing
4d
Write some questions to compare places.Then ask a partner your questions.
● What is the highest...? ● Which park is bigger,…or...?
Work in pairs to write some questions to compare places.
Lily: Hi, Tom! I read about natural wonders. Do you know the highest mountain in the world?
Tom: Mount Everest! It’s 8,848.86 meters high. Is it getting taller?
Lily: Yes! It grows a little every year. By the way, which is bigger, the Sahara or Arabian Desert?
Tom: The Sahara! It’s about 9,000,000 square kilometers—almost as big as China!
Lily: Wow! The Mariana Trench is the deepest ocean point, over 11,000 meters deep. Can you believe it?
Tom: No way! That’s deeper than Everest is high. What’s the longest river in Asia? Yangtze or Yellow River?
Lily: The Yangtze! It’s about 6,300 kilometers long—the longest in China.
Tom: Cool! Let’s make a list of amazing natural wonders and compare them.
Lily: Great! Let’s start with Victoria Falls—it’s one of the most beautiful waterfalls!
Sample:
Exercises
根据语境及括号内所给提示词填空
1. —Is here quiet?
—Yes, but I know somewhere much ________(quiet).
2. Their house is as _______(big) as mine.
3. The math test was _______________(difficult) than the English test. Few students passed (通过) the test.
4. She looks __________(young) than me, but in fact she is much _______(old).
5. Tina didn’t swim as _______(well) as Alice.
6.She is __________________ (careful) in her school.
7.I think beef noodles is _________________(delicious) of all.
8.Tony always works hard. Of all the students, he did ____________ (well) in this exam.
quieter
big
more difficult
younger
older
well
the most careful
the most delicious
(the) best
基础作业:抄写核心词汇（自然名词+比较级/最高级）各5遍。
提升作业:用5句话描述家乡的一处自然景观，至少使用2个最高级句型。
拓展作业：小组合作制作“世界自然奇观海报”，标注关键数据（面积、高度等），下节课展示。
Thanks

展开更多......

收起↑