资源简介

(共26张PPT)
Section A 1a—1d
Unit 4
The Wonders of Nature
Objectives
To talk about geography facts about natural wonders.
To compare facts about famous places.
To share geography facts using large numbers.
Lead-in
What do you know about MountQomolangma
What makes it amazing
It’s the highest mountain in the world.
...
It’s 8848.86 metres high.
What do you know about the Sahara Desert
What makes it amazing
It’s about 9,000,000 square kilometres in size.
It’s the biggest desert in the world.
...
What do you know about the Dead Sea
What makes it amazing
Its surface is 416 metres below sea level.
It’s the lowest place in the world.
...
What do you know about the Mariana Trench
What makes it amazing
It’s about 11,000 metres deep.
It’s the deepest point in the ocean.
...
Match the places with the pictures.
1a
_____ Nile River _____ Angel Falls _____Mount Qomolangma
_____ Dead Sea _____ Sahara Desert _____ Mariana Trench
F
A
D
C
E
B
Listen to the game plete the descriptions of the places.
1b
Place Description Measurement
Mount Qomolangma the ________________ in the world
_________ metres high
Sahara Desert the _______________ in the world about _________ square kilometres in size
Dead Sea the _______________ on earth ________ metres below sea level
Meriana Trench the _______________ in the ocean about ________ metres deep
highest mountain
8848.86
lowest place
9,000,000
biggest desert
416
deepest point
11,000
最高级
(superlatives)
“highest” is the superlative of “high”
“biggest” is the superlative of “big”
“lowest” is the superlative of “low”
“deepest” is the superlative of “deep”
形容词 / 副词最高级变化规则
high— highest
low — lowest
deep —deepest
一般情况下，在词尾加-est
large — largest
fine — finest
以不发音字母e结尾的词，在词尾加-st
heavy — heaviest
easy — easiest
early — earliest
以“辅音字母 + y”结尾的双音节词，先把y改为 i ,再加-est
形容词 / 副词最高级变化规则
big — biggest
fat — fattest
thin — thinnest
重读闭音节词词尾只有一个辅音字母时，先双写该辅音字母，再加-est
beautiful — most beautiful
interesting — most interesting
delicious — most delicious
多音节词和部分双音节词在词前加most
不规则变化
原级 最高级
good / well best
bad / badly worst
many / much most
little least
far farthest
furthest
GOOD, BETTER, BEST
Good, better, best,
Never let it rest,
Till good be better,
And better best.
Bad, worse, worst,
Never fight against,
Get better and better,
And you’ll be the best.
big
bigger
biggest
This apple is the biggest of the three.
10 yuan
20 yuan
50 yuan
This pen is the most expensive of the three.
expensive
more expensive
1c
Listen again. Complete the measurements in 1b
with the numbers below.
Listening tips:
1. Learn about the listening tasks and look through the numbers
in the box.
2. Pay attention to the places and numbers while listening.
3. Match the places with the numbers.
416 8848.86 11,000 9,000,000
较大数字的表达方法
1000以上的基数词的表示法：从数字的右端向左端数，每三位数加一个逗点；从右端向左端开始，第一个逗点处读thousand(千)，第二个逗点处读million(百万)，第三个逗点读billion(十亿)；读的时候通常在hundred后加and,如果百位数为0，则在thousand后加and。
较大数字的表达方法
9,883
65,359
265,468
60,263,050
nine thousand, eight hundred and
eighty-three
sixty-five thousand, three hundred and fifty-nine
two hundred and sixty-five thousand, four hundred and sixty-eight
sixty million, two hundred and sixty-three thousand and fifty
1d
Talk about the places you have learnt about.
What’s the lowest place on earth
It’s the deep sea.
Its surface is 416 metres below sea level.
Now, what’s …
How low is it
Ask and answer.
What’s the highest mountain in the world
It’s Mount Qomolangma!
How high is it
It’s 8848.86 metres high.
What’s the biggest desert in the world
It’s the Sahara Desert!
How big is it
It’s about 9,000,000 square kilometres.
Where’s the deepest point in the ocean
It’s the Mariana Trench!
How deep is it
It’s about 11,000 metres deep.
Language points
1. _____ metres below sea level 海平面下_____米
below
prep. 在（或到）……下面；少于；低于
adv. 在（或到）……下面
（1）Please don’t write below this line. 请不要写到这条线下面。
（2）They live on the floor below. 他们住在下一层楼。
prep.
adv.
拓展
The mouse is under the desk. 老鼠在桌子下面。
在（或到、通过）……下面（表示在某物的正下方）
高度；水平
2. Its surface is … metres below sea level.
它的平面在海平面以下……米。
surface
n. 表面；表层
v. 浮出水面；显露；出现
（1）The surface of the desk is smooth. 桌子的表面很光滑。
（2）The submarine surfaced near the island.
潜艇在岛屿附近浮出水面。
n.
v.
写出下列单词的最高级。
1. good _______
2. comfortable ________________
3. big _______
4. happy ________
5. cheap ________
6. many _______
7. difficult ______________
8. little _____________
best
most comfortable
biggest
happiest
cheapest
most
most difficult
least
Exercises
写出下列数字的英文表达。
433,024
856,730,452
59,725
four hundred and thirty-three thousand and twenty-four
eight hundred and fifty-six million, seven hundred and thirty, four hundred and fifty-two
fifty-nine thousand, seven hundred and twenty-five
Homework
1.Read the conversations.
2.Make a conversation with your partner about the wonders of nature you know well and write it down.

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