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3 句子：
What’s the highest mountain in the world? Qomolangma.
How high is Qomolangma?
It’s 8,844.43 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.
教学难点：形容词和副词的比较级和最高级变化规则和用法。
物体之间的对比。
Section A 1 (1a – 2a)
Step 1 Reviews: We have learn Unit 6 last week(yesterday),and today we’ll learn Unit 7 What’s the highest mountain in the world?
形容词、副词的最高级：三者或三者以上比较用最高级.
1) 常与in短语或of短语连用。形容词最高级前要加the, 但当前面有物主代词、名词所有格等修饰时，不加 the。副词最高级前可省 the.
eg. Susan is _____________(short) in her class.
He is ___________________(popular) of these boys.
Alice is my _________(good) friend among the three girls.
2) 形容词最高级前可被序数词修饰，其结构为：
the + 序数词+形容词最高级+单数名词.
eg. The Yellow River is _____________________(第二长) river in China.
3) “one of +the+形容词的最高级+复数名词”表示“最……的……之一”
eg. Hang zhou is one of _____________(beautiful)_______(city)in China.
( ) 3.Mo Yan is one of ____________writers today.
more famous B. most famous
C. much more famous D. the most famous
4）“a + 最高级”， “非常”, ＝ very.
eg. It’s a most important question.= It’s a ______ important question.
2. Show some pictures and information of the highest mountain, the longest river, the deepest salt lake and the biggest desert in the world.
Step 2 Warming up
1. Watch the photos and talk about them “How big/high/long/big is …?’ and help the students to answer: It’s …meters/kilometers/cm big/high/long/big.
2. Look these photos and practice the dialogue:
e.g. A: How high is Qomolangma?