人教新目标版英语八年级下Unit 7 What's the highest mountain in the world?Section A 4a-4c课件（25张PPT）

(共25张PPT)
Unit7 What's the highest mountain in the world
Section A grammar 4a-4c
What’s the highest mountain in the world
Qomolangma.
Role play
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.
Did you know that China is one of the oldest countries in the world
Yes, I did. It’s much older than the US.
1．规则变化
1)一般在词尾加 er和 est
tall—_______—________ long—_______—________
2)以不发音字母e结尾的加 r和 st
fine—_______—________ late—_______—________
taller
tallest
longer
longest
finer
later
finest
latest
[探究1 形容词、副词比较级和最高级的构成]
3)以重读闭音节结尾且末尾只有一个辅音字母时，须双写这个辅音字母，再加 er和 est
big—_______—________ thin—_______—________
4) 以“辅音字母 + y”结尾的双音节词，先把“y”改为“i”再加-er, -est
easy—______—______ friendly—________—________
5) 多音节和部分双音节，在原级前加more, most
interesting—______________—____________
easier
biggest
thinner
thinnest
bigger
easiest
friendlier
friendliest
more interesting
most interesting
2. 不规则变化
good/well better best
many/much more most
little less least
bad/badly/ill worse worst
far farther further
farthest furthest
old older oldest
elder eldest
①规则变化：
比较级，有变化，一般词尾加_____；
词尾不发音e简单化，之后只把 r加。
“辅音字母＋y”型，改____为____，加____；
一辅重读闭音节，词尾字母应双写。
多音节更容易，之前加________就可以。
3. 巧记形容词及副词比较级变化
er
y
more
i
er
②不规则变化：
“俩好”(good/well)是________；
“俩多”(many/much)是________。
“坏/病”(bad/ill)是________；
“老/远”(old/far)变化有两个。
better
more
worse
[注意]
①far的两个比较级有所不同：
farther强调距离远；further强调程度深。
②old的两个比较级的不同：
older指年龄较大的；elder指同一个家庭里两个成员中年纪较长的。
1．比较级句型
1)“比较级＋than”表示“____________”
China is larger than Italy.
中国比意大利大。
2)“less＋原级＋than”表示“____________”
The book is less inter esting than that one.
这本书不如那本书有趣。
比……更……
不如……
[探究2 形容词、副词比较级和最高级的用法]
3)“倍数＋比较级＋than”表示“是……的几倍……”
This box is three times bigger than that one.
这个箱子是那个的三倍大。
4)“比较级＋and＋比较级”表示“____________”
Our country is becoming stronger and stronger.
我们的国家正变得越来越强大。
5)“the＋比较级…，the＋比较级…”表示“____________”
The more, the better. 多多益善。
越来越……　
越……，越……
6)“比较级＋than any other＋单数可数名词”表示“比其他任何一个……都……”。
China is larger than any other country in Asia.
中国比亚洲任何一个其他国家都大。
7) “the＋比较级＋of the two”表示“两者中比较……的”。
The apple is the bigger of the two.这个苹果是两个中较大的。
2.同级比较句型
“as＋原级＋as”意为“____________”，其否定形式可用“not as/so＋原级＋as”表示，意为“____________”。如：
I am as thin as my mother.
我和我妈妈一样瘦。
The weather here is not as/so hot as that in Wuhan.
这里的天气不如武汉热。
与……一样
不及……
3．最高级句型
(1)the＋最高级＋of/in…
Mary is the quietest of all my friends.
玛丽是我朋友中最文静的。
(2)选择疑问句
Who is the strongest, Tom, Jack or Bill
汤姆、杰克和比尔，谁最强壮？
(3)the＋最高级＋定语从句
It's the most interesting gift that I have ever received.
这是我曾收到的最有趣的礼物。
Fill in the blanks with the correct forms of the words in the box.
4a
1. The Amazon River is one of the _______ rivers in the world. It’s a little _______ than the Yangtze River.
2. Qomolangma is 8,844.43 meters _____. It’s one of the most ________ places for serious mountain climbers.
3. No ocean in the world is as ____ as the Pacific Ocean.
4. Although Japan is _____ than Canada, it is _____ smaller.
longest
big much popular long old high
longer
high
popular
big
older
much
Write two comparisons about two topics. Write true facts.
4b
Two rivers: ________________ and _________________
__________________________________________________________________________________________________________________________________
the Yangtze River
the Amazon River
The Yangtze River is almost as long as the Amazon River.
The Amazon is longer than the Yangtze, but the Yangtze is the longest river in China.
Two cities: _________ and ___________
1. ___________________________________________.
2. ___________________________________________
____________________________________.
Shanghai Sydney
Shanghai is as modern as Sydney
Shanghai is much smaller than Sydney. Sydney is
almost 2 times as big as Shanghai
Two animals: _____________ and _________
1. _______________________________.
2. ___________________________________________
_______________________________ .
a fish a shark
A shark is bigger than a fish.
A fish is smaller than a shark. A shark eats more than a fish.
Write five questions using comparisons. Then ask your partner your questions.
4c
1. _______________________________________
2. _______________________________________
3. _______________________________________
4. _______________________________________
5. _________________________________
Which is the biggest park in our city
Who is the tallest student in our class
Who is the shortest student in our class
Who sings the best in our class
What is the highest building in our city
Exercise
1. -What do you think of Tom’s speaking
-No one does ____ in our class.
A. good B. better C. well D. best
2.-Which city is your favorite
-Hangzhou, of course. It’s the ___ place that I want to visit.
A. worse B. worst C. better D .best
B
D
3. —What a careful boy you are!
—Thank you. In fact, Tom does everything ___ than me.
A. more carefully B. more careful C. much careful
4. — It’s so cold today.
— Yes, it’s _____ colder than it was yesterday.
　A. some B. more
C. very D. much
A
D
5. The more you smile, the _____ you will feel.
A. happy B. happier
C. happily D. more happily
4. It is said that it is ____ today as yesterday. Shall we
go skating this afternoon
A. the hottest B. as hot
C. hottest D. hotter
B
B
GOOD JOB