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(共24张PPT)
Unit 4
The Wonders of Nature
Section A What is amazig about nature
Learn new words and phrases: waterfall, civilization, at all costs, development...
Compare facts about famous places.
01
02
Learning goals
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
China
Egypt
5, 464
6, 671
civilizations
Other geographical features in China
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
Summary
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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