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人教八下英语同步精品课件
人教版八年级下册
Unit 7 What's the highest mountain
in the world
Section A Grammar Focus-4c
语法精品课
人教版八下英语同步精品课件
Learning goals
1.在语境中认读、理解运用下列词汇: ocean, the Pacific Ocean；
2.理解用大数字表达长、宽、高、深的相关用法；
3.复习并掌握形容词和副词三个等级原级；比较级和最高级的用法；
4.通过4a和4b练习进一步巩固知识；
5.通过本节课学习,提高同学们对于保护濒危野生动物的意识。
New words
Read and repeat.
ocean/ n/
n. 大海；海洋
the Pacific Ocean
/ p s f k n/
n. 太平洋
Warm up
Let’s watch a video.
Top of the world
1.The Nile is the longest river in the world.
2.The Caspian Sea is the deepest of all the lakes.
3.Qomolangma is one of the highest mountains
in the world.
superlative
degree(最高级)
Lead in
Geographic facts
地理常识
the longest river
(have) the biggest population
the highest mountain
the biggest country
the biggest desert
the biggest salt lake
the biggest ocean
the biggest continent
Ask and answer
- What is longest river/the biggest country in the world ……
- Which country has the biggest population
观察 思考 回答
形容词的最高级
语法探究之一
方框中的词形表现了什么语法？
Leading-in
规则变化
Revision: 形容词和副词的比较级和最高级
①直接加-er 或 -est
tall—________—______ long—_______— ________
taller tallest
longer longest
②以不发音的字母e结尾的单词直接加-r或 -st
nice—_____— ____
nicer nicest
③以“辅音字母加y” 结尾, 把y变i，再加-er或-est
heavy—_______— ________
heavier heaviest
④重读闭音节（末尾只有一个辅音字母）双写辅以字母
再加-er或-est
big—_______— ________
bigger biggest
⑤部分双音节词和多音节词 分别在原级前加more构成比较级
和most构成最高级
slowly—_____________— _______________
beautiful—__________________— ____________________
more slowly the most slowly
more beautiful the most beautiful
不规则变化
原级 比较级 最高级
good\well better best
bad\badly worse worst
many\much more most
little less least
old older\elder oldest\oldest
far farther(更远) further(进一步的) farthest\furthest
Revision: 形容词和副词的比较级和最高级
英语中的副词和形容词有三个等级：原级，比较级和最高级
1. …as +原级 +as … “和…一样”
你和我一样高。
Lily和Lucy 跑的一样快。
You are as tall as me.
Lily runs as fast as Lucy.
2. 否定形式…not so\as +原级 +as … “前者不如后者”
你不如我高。
Lily跑得不如Lucy快。
You are not so\as tall as me.
Lily doesn’t run so\as fast as Lucy.
3. 倍数+as+原级 +as … “… 是…的几倍；表倍数关系”
You house is three times as large as mine.
This sofa is twice as big as that one.
比较级的用法
1. 主语+谓语+比较级+than+比较对象 “…比…如何”
汤姆比他弟弟聪明。
他跑得比汤姆快。
Tom is cleverer than his brother.
He runs faster than Tom.
2. 主语+谓语+the+比较级+of the two “主语是两者中较…的一个”
杰克是兄弟二人中较瘦的一个。
Jack is the thinner of the two brothers.
3. the+比较级… ，the+比较级… “越…，就越…”
孩子们越早学会独立，对他们的未来就越好。
你学习越努力，你越能取得好成绩。
The earlier kids learn to be independent, the better it is for their future.
The harder you study, the better grades you will get.
4. 比较级+and+比较级… “越来越…”
越来越好， 越来越高
越来越美丽， 越来越外向
better and better, taller and taller.
more and more beautiful\outgoing
我们的国家正变得越来越强大。
雪正下得越来越大。
Our country is becoming stronger and stronger.
5. 比较级前可用even, far, much, a little, bit等修饰，表示程度。
你对此事的了解甚至还不如我。
大象比熊猫中的多。
You know ______less about it than I do.
The elephant weighs ______ more than the panda.
even
much
最高级的用法
形容词和副词的最高级常用于______或_________的人或事(物)之间的比较。在句中使用时,形容词最高级前通常用_____.句中常含有表示比较范围的介词_____或_____。常用的句型结构为:
三者以上
三者
the
in
of
1. 主语+谓语+(the)+最高级+in\of … “…中最…”
这是所有故事中最令人惊讶的。
This is the most amazing story of all.
2. 主语+谓语+ one of the +最高级+in\of … “…中最…之一”
它是我们镇上最宽的公路之一。
It is one of the widest roads in our town.
3. 主语+谓语+the +序数词+最高级+名词+in\of … “…中第…的”
李明是我们班第二高的男孩。
Li Ming is the second tallest boy in our class.
4. 疑问词+谓语+the +最高级，A，B or C “ 在ABC中，谁最…？”
月亮，地球和太阳哪个最大？
Which is the biggest, the moon, the earth or the sun？
观察 思考 回答
相同点：两句都是含有than的比较级句型；
不同点：第一句比较级形式表达最高级含义；第二句只是
表达两者比较。
语法探究之二
方框中的句子有何异同？
Leading-in
Presentation
The usage of the superlative adjective
用法：比较级形式表最高级含义。（比较双方属于同一范围内）
a. 比较级＋than＋any other＋单数名词+范围
He is taller than any other boy in his class.
b. 比较级 ＋ than＋the other＋复数名词+范围
比较级 ＋ than＋the rest of ＋ 复数名词+范围
比较级 ＋ than＋any of the other+复数名词+范围
She goes to school earlier than the other girls in her class.
China is larger than any of the other countries in Asia.
c. 比较级 + than + anything/anyone else
George did more work than anyone else.
Tom cared more for money than for anything else 汤姆最喜欢钱。
观察 思考 回答
语法探究之三
请圈出对物体高度提问及回答的句型
Leading-in
How high is Qomolangma It’s 8,844.43 meters high.
1.观察并总结:
8.844 43 meters high
______+______+_____________(long, high, wide, deep…)构成的;
提问时要用how+形容词+谓+主。
2.练一练：
(1)2500米深 ____________________
(2)35千米宽 ____________________
(3)6671千米长 ____________________
基数词
量词
长\高\宽\深
2500 meters deep
How deep is the lake
35 kilometers wide
How wide is the bridge
6671 kilometers long
How long is the river
Presentation
如何对物体的长度、高度、宽度和深度提问？
① 问深度：How deep is/are ...
How deep is the West Lake
② 问长度：How long is/are/ ...
How long is the river
③ 问高度：How high is/are ...
How high is the door
④ 问宽度: How wide is/are ...
How wide is our claasroom
Fill in the blanks with the correct forms of the words in the box.
big much popular long old high
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
longer
high
popular
big
4a
older
much
4b
Write two comparisons about two topics.
the Yangtze River
the Amazon River
＆
The Yangtze River The Amazon River
6,300km 6,480km
1. The Yangtze River is almost as long as the Amazon River.
2. The Amazon is longer than the Yangtze, but the Yangtze is the longest river in China.
Two cities:
Ji Nan
＆
Bei Jing
population of Ji Nan Population of Bei Jing
8,700,000 21,540,000
The population of Jinan is not___ _____ _____ that of Beijing.
The population of Beijing is ______ ______than that of Jinan,
as large as
much large
Two animals:
tigers
＆
elephants
The tigers run _____ _____ than elephants.
The elephants weighs ______ ______than tigers,
much faster
much more
4c
Group work
Write five questions about Chengdu using comparisons. Then discuss your questions in groups.
1. _________________________________
2. _________________________________
3. _________________________________
4. _________________________________
5. _________________________________
What is the highest building in Chengdu
What is the largest single buiding in Chengdu
Which is the busiest road in Chengdu
What is the most popular street in Chengdu
What is the most delicious food in Chengdu
Guessing game
Exercises
1. My brother has ____ books than I.
A. much B. more C. many D. most
2. The more you smile, the _____ you will feel.
A. happy B. happier C. happily D. more happily
3. I know you are shorter than your brothers，but you run _________.
A. more faster B. fastest C. more fast D. fast
4. Mr Smith thought the Century Park was the second _____ in Shanghai.
A. large B. larger C. largest D. very large
5. I think English is as ____ as maths.
A. important B. more important C. most important D. importanter
单项选择
B
B
B
C
A
I jumped ______(high )than Bill in the sports meet last year
Of all the drinks, tea is _________(old) in the world. It has 5,00 years of history in China.
Mr. Smith thought the Century Park was the second ________ (large) in Shanghai.
The _______(busy)he is, the ________(happy)he feels,
I think English is as __________(important) as math
What do you think of the dress
Wonderful. I don't think I can find ______(good)one.
higher
the oldest
largest
busier
happier
important
better
用所给单词的正确形式填空
Homework
Preview next lesson. Find out some differences between an adult panda and a baby panda.
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