Unit 4 The Wonders of Nature Section A Grammar Focus-4d 课件 2025-2026学年人教版英语八年级下册

资源下载
  1. 二一教育资源

Unit 4 The Wonders of Nature Section A Grammar Focus-4d 课件 2025-2026学年人教版英语八年级下册

资源简介

(共36张PPT)
Unit 4
The Wonders of Nature
Section A (Grammar Focus-4d)
Learning objects
知识与技能:
掌握形/副词比较级、最高级,大数读写,完成语篇填空。
过程与方法:
通过练习提升语法运用能力,学会用比较级描述自然景观。
情感态度与价值观:了解自然奇观,培养对自然的热爱与英语学习兴趣。
文化意识:了解世界自然景观,拓宽国际视野。活和安全意识,学会关心他人并给出恰当建议。
Do you remember how to pronounce these numbers
What is the biggest desert in the world It is the Sahara Desert.
How big is it It is about 9,000,000 square kilometres in size.
Where is the deepest point in the ocean It is in the Mariana Trench.
How deep is it It is about 11,000 metres deep.
Some deep-sea animals are blind, but they can “see” as well as others. Mount Qomolangma is one of the greatest wonders of the world, and it is still growing taller. The Yangtze River travels the farthest in China and is about 6,300 kilometres long.
你还记得形容词、副词变
比较级、最高级吗?
形容词、副词的
比较级、最高级
Let's review
形容词和副词的比较级与最高级(Comparative and Superlative Forms of Adjectives and Adverbs)
大多数形容词和副词有三个等级:原级,即原形;比较级,表示“较……”或“更……一些”;最高级,表示“最……”。
形容词、副词变比较级、最高级,分为规则变化和不规则变化
构成规则 比较级\最高级
一般情况下,直接加er,est taller;shorter;faster
tallest;shortest;fastest
以e结尾的词,加r,st larger;later
largest;latest
重读闭音节词尾只有一个辅音字母时,先双写辅音字母,再加er,est bigger;fatter;thinner
biggest;fattest;thinnest
以“辅音字母+ y”结尾的双音节词,改y为i,再加er,est easier;heavier;earlier
easiest;heaviest;earliest
多音节词和部分双音节词,词前加more,most more beautiful;more popular
most beautiful;most popular
比较级、最高级规则变化
都以er、est结尾,四字口诀?“直、去、双、改”
原级
long → ______
small → ______
hard → ______
slow → ______
nice → ______
fine → ______
wide → ______
safe → ______
hot → ______
red → ______
wet → ______
sad → ______
happy → ______
busy → ______
lucky → ______
heavy → ______
clever → ______
polite → ______
simple → ______
gentle → ______
important → ______
difficult → ______
carefully → ______
comfortably → ______
比较级
longer;
smaller; “直”
harder;
slower
nicer;
finer; “去”
wider;
safer
hotter;
redder; “双”
wetter;
sadder
happier;
busier; “改”
luckier;
heavier
more clever(或 cleverer);
more polite;
more simple(或 simpler)
more gentle
more important;
more difficult;
more carefully;
more comfortably
最高级
longest;
smallest; “直”
hardest;
slowest
nicest;
finest; “去”
widest;
safest
hottest;
reddest; “双”
wettest;
saddest
happiest;
busiest; “改”
luckiest;
heaviest
most clever(或 cleverest);
most polite;
most simple(或 simplest)
most gentle
most important;
most difficult;
most carefully;
most comfortably
1. 形容词和副词的比较级和最高级的不规则变化表格
“as + 形容词或副词原形 + as” 句型
(1)表示两者在某一方面一样,
用“as + 形容词或副词原形 + as”的句型。例如:
I think science is as important as maths.
Tom runs as fast as Jack.
(2)表示一方在某一方不一样,
用“not as / so + 形容词或副词原形 + as”的句型。例如:
It is not as / so warm today as yesterday.
He did not come as / so early as Wang Lin.
比较级一样、不一样常用2个句型
1. A + be + 形容词比较级 + than + B.
释义:A 比 B 更……
例句:Sally is thinner than Betty.;She does her homework more carefully than I (do).
2. A + be + 倍数 + 形容词比较级 + than + B.
释义:A 的……是 B 的几倍
例句:This ball is three times bigger than that one.
3. A + be + the + 形容词比较级 + of the two.
释义:A 是两者中较……的那个
例句:Sam is the taller of the two.
4. 比较级 + and + 比较级
释义:越来越……
例句:The weather is getting warmer and warmer.
比较级不一样常用8个句型
5. the + 比较级,the + 比较级
释义:越……,越……
例句:The more we get together, the happier we'll be.
6. 疑问词 + be + 形容词比较级,A or B
释义:A 和 B,哪一个更……
例句:Which country is larger, China or Canada
7. 疑问词 + 实义动词 + 副词比较级,A or B
释义:A 和 B,哪一个更……
例句:Who dances better, Joan or Jean
8.“A+be 动词+形容词比较级+than any other+B(可数名词单数)(+其他).”=
“A+be 动词+形容词比较级+than the other+B(可数名词复数)(+其他).”,
释义: “A 比其他任何 B 都……”,(用比较级表达最高级含义)
例句:He is taller than any other boy in his class.
=He is taller than the other boys in his class.
他比他班里的其他任何一个男生都要高。
注:在形容词和副词的比较级前,可以用much、a little、a lot、even等修饰。例如:
I'm feeling much better today.My brother is a little taller than me.
3、最高级中the用法。
3.1一定有the:形容词最高级前一般要用定冠词 the,
3.2一定没有the: 当最高级前有物主代词、指示代词或名词所有格等修饰
3.3.可有可无the:副词最高级前。例如:
我认为世界上最有用的植物是竹子。
我是你最好的朋友。
在我们班玲玲住得离学校最远。
I think the most useful plant in the world is bamboo.
I am your best friend.
Lingling lives (the) farthest from school in our class.
4、形容词最高级的修饰词
4.1可加 far,by far,almost,nearly 等。例如:
4.2.序数词可修饰形容词最高级。例如:
4、形容词最高级的修饰词
4.1可加 far,by far,almost,nearly 等。例如:
这个包几乎是最便宜的。
亚洲是目前世界上最大的洲。
4.2.序数词可修饰形容词最高级。例如:
黄河是中国第二长的河流。
4、形容词最高级的修饰词
4.1可加 far,by far,almost,nearly 等。例如:
This bag is nearly / almost the cheapest.
这个包几乎是最便宜的。
Asia is by far the largest continent in the world.
亚洲是目前世界上最大的洲。
4.2.序数词可修饰形容词最高级。例如:
The Yellow River is the second longest river in China.
黄河是中国第二长的河流。
5、最高级的常用句型
(1) “……是……中最……的”。
(1一1) “主语+be动词+the+形容词最高级+in/of短语.”
(1一2) “主语+实义动词+(the)+副词最高级+in/of短语.”
5、最高级的常用句型
(1) “……是……中最……的”。
(1一1) “主语+be动词+the+形容词最高级+in/of短语.”
托尼是三个男孩中年龄最小的,但是他是最高的。
(1一2) “主语+实义动词+(the)+副词最高级+in/of短语.”
简总是我们班到校最早的。
5、最高级的常用句型
(1) “……是……中最……的”。
(1一1) “主语+be动词+the+形容词最高级+in/of短语.”
Tony is the youngest of the three boys, but he is the tallest.
托尼是三个男孩中年龄最小的,但是他是最高的。
(1一2) “主语+实义动词+(the)+副词最高级+in/of短语.”
Jane always arrives at school earliest in our class.
简总是我们班到校最早的。
5、最高级的常用句型
(2)“……是最……的,A、B还是C ”。
(2一1) “特殊疑问词(组)+be动词+the+形容词最高级,A or B or C ”
(2一2)“特殊疑问词(组)+助动词+主语+动词原形+(the)+副词最高级,A,B or C ”
5、最高级的常用句型
(2)“……是最……的,A、B还是C ”。
(2一1) “特殊疑问词(组)+be动词+the+形容词最高级,A or B or C ”

谁最高,李明、王涛还是张亮?
(2一2)“特殊疑问词(组)+助动词+主语+动词原形+(the)+副词最高级,A,B or C ”

你最喜欢哪一种,玫瑰、牡丹还是莲花?
5、最高级的常用句型
(2)“……是最……的,A、B还是C ”。
(2一1) “特殊疑问词(组)+be动词+the+形容词最高级,A or B or C ”
◆ Who is the tallest, Li Ming, Wang Tao or Zhang Liang
谁最高,李明、王涛还是张亮?
(2一2)“特殊疑问词(组)+助动词+主语+动词原形+(the)+副词最高级,A,B or C ”
◆ Which do you like best, roses, peonies or lotus flowers
你最喜欢哪一种,玫瑰、牡丹还是莲花?
5、最高级的常用句型
(3)比较级表示最高级的含义
(3一1)“形容词/副词比较级+than any other+可数名词单数”意为“比
(3一2)“形容词/副词比较级+than any+可数名词单数”,意为“比任
何……都……”,强调在不同范围内作比较。
5、最高级的常用句型
(3)比较级表示最高级的含义
(3一1)
在我们班,杰克比其他任何一个学生都勤奋。
(3一2)
重庆比江苏省的任何一个城市都大。
5、最高级的常用句型
(3)比较级表示最高级的含义
(3一1)
◆ Jack is more hard - working than any other student in our class.
在我们班,杰克比其他任何一个学生都勤奋。
(3一2)
◆ Chongqing is larger than any city of Jiangsu Province.
重庆比江苏省的任何一个城市都大。
Complete the passage with the correct forms of the words in the box.
4c
large loud amazing far close
My friends and I visited Victoria Falls in Africa last year. Visiting
one of the world’s _______ waterfalls was a magical experience.
As we went ______ to the falls, the noise of the water slowly
grew ________ and louder. Then, right before our eyes, the
waterfall appeared. It went on for as ____ as the eye could see. Later, we sat in a special pool at the top of the falls. There, we felt the water rush past us and become a part of the waterfall. It was the scariest but also the ____________ experience of our trip!
largest
closer
louder
far
most amazing
Do you remember how to pronounce these numbers
What is the biggest desert in the world It is the Sahara Desert.
How big is it It is about 9,000,000 square kilometres in size.
Where is the deepest point in the ocean It is in the Mariana Trench.
How deep is it It is about 11,000 metres deep.
Some deep-sea animals are blind, but they can “see” as well as others. Mount Qomolangma is one of the greatest wonders of the world, and it is still growing taller. The Yangtze River travels the farthest in China and is about 6,300 kilometres long.
英语中,数字的读法,和汉语一样吗?
大数字读法:
Let’s learn.
从右往左,三位一截,每截都按三位数读
截完加单位:billion / million/thousand/hundred,
and 用在百十间,小数数字逐个读
大数字读法:
Let’s learn.
213, 458 ,848.86
thousand
two hundred and thirteen million, 213,000,000,
four hundred and fifty-eight thousand, 458,000
eight hundred and forty-eight point eight six 848.86
point
eight six
小数部分逐个读出每个数字
million
大数字
读法
hundred
大数字读法:
Let’s learn.
11000
9000000
6,300
eleven thousand
nine million
six thousand three hundred
Let’s read.
阿拉伯数字 英语表达
153
2020.35
10670
864300
7080000
one hundred and fifty-three
two thousand and twenty point three five
ten thousand, six hundred and seventy
eight hundred and sixty-four thousand, three hundred
seven million, eighty thousand
Write or spell out the numbers.
4b
1. Mount Kilimanjaro is ______ (five thousand, eight hundred and ninety-five)
metres high.
2. _______ (twenty-five thousand, seven hundred and sixty-eight) cubic metres of water pours down Inga Falls each second.
3. The East African Rift Valley is about 4,000 (____________) miles long.
4. The Taklimakan Desert has a total area of about 337,000 (_____________________
______________) square kilometres.
5895
25768
four thousand
three hundred and thirty-
seven thousand
高度
体积
长度
面积
hundred/thousand/million/billion 用法:
Let’s learn.
有具体数字:用单数,不加s
表模糊概数:用复数,加s + of
five hundred(500)、
two million(200万)
hundreds of(成百上千)
thousands of(成千上万)
单项选择。
1. — How many stars are there in the sky
— There are ______ stars.
A. million B. millions C. millions of D. million of
2. There are ______ students in our grade.
A. five hundred B. five hundreds
C. five hundred of D. five hundreds of
Mount Qomolangma
Sahara Desert
Dead Sea
Mariana Trench
Yangtze River
Nile River
Great Barrier Reef
416
6,300
6,671
11,000
345,000
8,848.86
9.000,000
Let’s match and make up sentences.
meters high
square kilometers
meters below sea level
kilometers long
kilometers long
meters deep
square kilometers
Mount Qomolangma is 8,848.86 meters high.
See you
next class!
Thanks!
https://www.21cnjy.com/recruitment/home/fine

展开更多......

收起↑

资源预览