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(共30张PPT)
Unit 4 The Wonders of Nature
Section A Grammar focus
通过听读例句、分析结构等方式，获取并正确认读形容词和副词比较级、最高级的构成规则（规则变化、不规则变化）及核心用法相关词汇与句式（如bigger, the biggest, more amazing等），感知比较级与最高级的语法特征；（学习理解）
1
通过完成句式填空、改写句子、编写比较类问题等练习，获取比较级与最高级在描述事物特征、动作程度时的关键用法，归纳并内化“比较级+than”“one of the+最高级+可数名词复数”等常用表达；（应用实践）
通过讨论、问答互动等活动，理解比较级与最高级在实际交际中描述事物差异、进行对比的意义，能够主动运用该语法结构描述身边的人或事物，并认同准确运用比较句式能让表达更丰富的语言理念。 （迁移创新）
学习目标
2
3
Learn new words and phrases: waterfall, civilization, at all costs, development...
Compare facts about famous places.
01
02
Learning goals
1. wonder n. 奇观；惊叹 v. 琢磨；想知道；感到诧异—
wonderful adj. 精彩的；绝妙的
2. measure v. 测量；量度为—measurement n. 数量；测量
3. deep adj. 深的；有……深的—depth n. 深(度)；纵深
4. research v. & n. 研究；调查—researcher n. 研究者
5. usual adj. 通常的—unusual adj. 特别的；不寻常的—
usually adv.通常地
6. on earth 在地球上
7. square kilometre 平方千米
8. below/above sea level 低于/高于海平面
9. dive into the deep sea 潜入深海
10. the bottom of …… 的底部
Host: __________our game show! Today, it's all about geography.
Answer as quickly as you can!
Question one: What is the________________in the world
Fu Xing: It's Mount Qomolangma!
Host: Correct! ________________
Lin Hongyu: I know this—it's 8,848.43 metres high.
Host: No, sorry. Fu Xing
Fu Xing: Is it 8,848.86 metres
Host: Yes! But some scientists say Qomolangma is still_____________ !
Now, name the________________ in the world.
Fu Xing: The Taklimakan Desert
Welcome to
highest mountain
growing taller
How high is it
biggest desert
Listen and fill in the blanks.
Host: ___________! Ella
Ella: It's the Sahara Desert.
Host: Right! Now, ________________
Ella: It's about 9,000,000 square kilometres.
Host: That's right! What's the _______________ on earth
Lin Hongyu: It's the Dead Sea!
Host: Well done! Its surface is 416 metres ______ sea level.
Now where's the ______________ in the ocean
Fu Xing: It's in the Mariana Trench.
Host: That's correct! How _______ is it
Fu Xing: It's about 11,000 metres deep.
Host: Correct!
Wrong
how big is it
lowest place
below
deepest point
deep
Host: Welcome to our game show! Today, it's all about geography. Answer as
quickly as you can! Question one: What is the highest mountain in the world
Fu Xing: It's Mount Qomolangma!
Host: Correct! How high is it
Liu Hongyu: I know this—it's 8,848.43 metres high.
Host: No, sorry. Fu Xing
Fu Xing: Is it 8,848.86 metres
Host: Yes! But some scientists say Qomolangma is still growing taller! Now, name
the biggest desert in the world.
Fu Xing: The Taklimakan Desert
Host: Wrong! Ella
尽快
世界上最高的山
询问高度
……米高(表达高度)
说出世界上最大的沙漠(name动词)
Ella: It's the Sahara Desert.
Host: Right! Now, how big is it
Ella: It's about 9,000,000 square kilometres.
Host: That's right! What's the lowest place on earth
Liu Hongyu: It's the Dead Sea!
Host: Well done! Its surface is 416 metres below sea level. Now where's the
deepest point in the ocean
Fu Xing: It's in the Mariana Trench.
Host: That's correct! How deep is it
Fu Xing: It's about 11,000 metres deep.
Host: Correct!
平方公里(面积单位)
地球上最低的地方
它的表面在海平面以下416米(描述海拔)
海洋中最深的点
询问深度
……米深(表达深度)
The village is below the mountain.（村庄和山不在同一垂直线上）
I usually put the basketball under the chair.（篮球和椅子在同一垂直线上）
辨析：below与under 两者都表示"在……下方"，但具体含义不同。 below 不强调垂直关系，只要位置低于某物即可，与above相对
under 强调垂直下方的位置关系，与over相对
There are many amazing natural wonders in the world. Mount Qomolangma is the _______________ in the world. It’s __________ metres high. The Sahara Desert is the ____________ in the world. It’s about ____________ square kilometres in size. The Dead Sea is the ____________ on earth. Its surface is __________ metres below sea level. The Mariana Trench is the ____________ in the ocean. It’s about ________ metres deep.
highest mountain
8,848.86
biggest desert
9,000,000
lowest place
416
deepest point
11,000
A: What’s the ... in the world
B: It’s ...
A: How ... is it
B: Its surface is ... metres below sea level.
A:Now,what’s ...
Word Bank
Superlatives：highest, biggest, lowest, deepest
Nouns：mountain, desert, place, point
Wonders：Mount Qomolangma, the Sahara Desert, the Dead Sea, the Mariana Trench
Data：8848.86 metres, 9,000,000 sq km, 416 metres, 11,000 metres
Adjectives：high, big, low, deep
B: ...
What is the name of the river mentioned in the video
Is it the longest river in China
It’s the Yellow River.
No, the longest river is the Yangtze River.
Do you know anything else about the Yellow River or the Yangtze River
Language points
物体长、宽、高、深等的表达
基数词+单位词+形容词(long、wide、high、deep等)
基数词+单位词+in+名词(length、width、height、depth等)
The river is 20 metres wide (= 20 metres in width).
这条河宽20米。
develop v.
发展；壮大
development n.
发展；壮大
developing adj.
发展中的
developed adj.
发达的
by the way 顺便提一下；附带问一句
learn about 了解
ancient civilizations 古代文明
mother river 母亲河
at all costs 不惜任何代价
the development of ……的发展
Let’s enjoy some natural wonders of the world.
比较级和最高级的构成
long
longer
longest
1. 一般在词尾加-er，-est。
2. 以不发音的e结尾加-r，-st。
3. 以重读闭音节结尾，
双写尾字母，再加-er，-est。
4. 以辅音字母加y结尾的，
变y为i再加-er，-est。
5. 多音节和部分双音节词，
词前加 more， most。
nice
nicer
nicest
big
bigger
biggest
heavy
heavier
heaviest
famous
more famous
most famous
river
scenery
lake
snow
mountain
规则变化
原级 比较级 最高级
good / well
many / much
bad / badly
little (少)
old
far
better
best
more
most
worse
worst
less
least
older/elder
oldest/eldest
farther/further
farthest/furthest
不规则变化
1. big
2. high
3. low
4. deep
5. easy
6. far
7. happy
8. loud
9. great
10. close
11. amazing
12. interesting
__________ _________
__________ _________
__________ _________
__________ _________
__________ _________
__________ _________
__________ _________
__________ _________
__________ _________
__________ _________
__________ _________
__________ _________
写出下列单词的比较级和最高级
bigger
biggest
higher
highest
lower
lowest
deeper
deepest
easier
easiest
farther
farthest
happier
happiest
louder
loudest
greater
greatest
closer
closest
more amazing
most amazing
more interesting
most interesting
比较级的用法
1. 形容词或副词的比较级+than
The Changjiang River is longer than it. 长江比它长。
Bill runs faster than any other boy in his class.比尔跑得比班上其他任何男孩都快。
2.“比较级+and+比较级(单音节词和部分双音节词)”
或“more and more+原级(多音节词和部分双音节词)”表示“越来越……”。
Summer is coming. It's getting hotter and hotter.
夏天就要来了。天越来越热了。
3.“the +比较级...，the+比较级..”表示“越……,就越……”。
The more you read, the more you know.你阅读得越多,知道的就越多。
最高级的用法
1. (the+)最高级(+名词)+in/of 短语， 意为“……中最……的”。
I think spring is the best time of a year. 我认为春天是一年中最好的时节。
Tom works (the) hardest in Class3. 在三班汤姆学习最努力。。
2. one of the +形容词最高级+可数名词复数+in/of 短语，
意为“……中最……的……之一”。
Hangzhou is one of the most beautiful cities in the world.
杭州是世界上最美的城市之一。
3.“Which/Who...(the+)最高级，A,B or C ” 意为哪个/谁是最......,A,B还是C？。
Who sings best in your class, Lily, Tom or Jack
你们班谁唱得最好，莉莉，汤姆还是杰克？
Practice
用所给词的适当形式填空
1.The Yellow River is _________ (long) than the Huaihe River.
2.Mount Tai is the _________ (high) of the two mountains in Shandong.
3.The sea is getting more and more _________ (beautiful) with protection.
4.This lake is the _________ (deep) in our province.
5.Which is _________ (long), the Amazon River or the Nile River
6.This river is three metres __________ (wide) than that one.
7.Hainan Island is the second __________(large) island in China.
8.The sunset over the ocean is one of the _______________ (amazing)
scenery in the world.
longer
higher
beautiful
deepest
longer
wider
largest
most amazing
9，365,278,689
thousand
million
1.从数字的右端向左数，每三位数加一个逗号。
2.从右向左，第一个逗号处读thousand（千），
第二个逗号处读million（百万），
第三个逗号处读billion（十亿）。
3.读数时，通常在hundred后加and；若百位数为0，则在thousand后加and。
4.英语中无直接表示“万”和“亿”的单位词，
需用thousand和million表达，
如“一万”是ten thousand、“一亿”是one hundred million。
较大数字的表达与读法
billion
写出或读出下列数字。
2,674 → ________________________________________________
164,213,430 → ___________________________________________
__________________________________________
18,357,089 → ____________________________________________
____________________________________________
twenty-eight thousand, six hundred and fifty-six ______________
forty million, four hundred and twenty-four thousand __________
two thousand, six hundred and seventy-four
one hundred and sixty-four million, two hundred and thirteen thousand, four hundred and thirty
eighteen million, three hundred and fifty-seven thousand, and eighty-nine
28,656
40,424,000
5,895
25,768
four thousand
three hundred and thirty-seven thousand
largest
close
louder
far
most amazing
Summary
形容词和副词的比较级与最高级
较大数字的表达
规则变化、不规则变化
比较级和最高级的构成
比较级的用法
最高级的用法
1. 比较级+than
2. the + 比较级, the + 比较级
3. 比较级 + and + 比较级
more and more + 形容词/副词原级
1. (the +) 最高级 + in/of/among短语
2. one of the + 形容词最高级 + 可数名词复数 + in/of短语
3. “Which/Who...(+the)+最高级, A, B or C ”
4. the + 序数词 + 形容词最高级 + 可数名词单数 + in/of短语
thousand
million
9，365,278,689
billion

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