资源简介

(共32张PPT)
Unit 4 The Wonders Of Nature
SectionnA Grammar Focus (4a-4d)
人教版 八年级下册
学习目标
1. 语言能力
掌握形容词和副词最高级的规则变化与不规则变化，能在语境中准确运用 the + 最高级、one of the + 最高级及 the + 序数词 + 最高级结构。
2.学习能力
能通过观察例句，自主归纳最高级的句法规律；能利用思维导图梳理原级、比较级与最高级的变形逻辑。
3.文化意识
了解英语国家常用最高级描述地理、动物、人物、校园生活等话题，感受中外表达习惯的异同。初步形成用英语介绍身边事物、表达个人偏好的跨文化交际意识。
4. 思维品质
能区分最高级在不同句型中的功能差异；发展批判性思维，能对多个事物进行观察、比较、分类、排序，形成清晰的逻辑判断。
学习重、难点
1. 学习重点
最高级构成规则、不规则变化、the+最高级+in/of 用法。
2.学习难点
比较范围辨析、修饰词使用、易混句型区分。
01
lead-in
Think and Talk
How long is the Yellow River
What is special about it
Why it’s called the Yellow River
Why do we call the Yellow River mother river
It’s 5,464 kilometers long.
It’s the second longest in China.
We call it our “mother river”.
Because it’s yellow.
Some parts of the river carry brown and yellow earth.
Because it helped ancient civilizations to develop.
Think and Talk
How long is the Yangtze River
What is special about it
It’s about 6,300 kilometers long.
It’s the longest in China.
It travels the farthest.
Think and Talk
How long is the Nile
What is special about it
Why is the Nile important in Egypt’s histoy
It’s the longest in the world.
It helped ancient civilizations to develop.
It’s 6,671 kilometers long.
02
Presentation
Read the sentences. Circle the adjectives which compare things. Underline the adverbs which compare actions.
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.
4a
How do we compare things or actions
We use adjectives to compare things and adverbs to compare actions.
the Yangtze River
长江
6300 km
the Amazon River
亚马逊河
6440 km
the Nile
尼罗河
6670 km
long
longer
longest
The Amazon River is longer than the Yangtze River.
The Nile is longer than the Amazon River.
The Nile is the longest of all.
概念理解
比较级：_____者比较。
最高级：_____者或_____者以上比较。
两
三
三
1.比较级和最高级的基本概念
概念：用来修饰名词的形容词或者修饰动词的副词，会因为修饰程度不同而有所“比较”，可分为原级，比较级（更......）与最高级（最......）。
规则变化
（1）一般情况下，单音节或双音节的形容词/副词比较级＋er，最高级＋est
　　 clever－cleverer－cleverest
（2）以 e 结尾的词，比较级＋r，最高级＋st
　　 nice－nicer－nicest
（3）以辅音字母＋y 结尾的词，变 y 为 i，＋er / est
　　 easy－easier－easiest
（4）以一个辅音字母结尾的重读闭音节词，双写该辅音字母＋er / est
　　 fat－fatter－fattest
（5）多音节和部分双音节的词需要在原级前＋more 构成比较级，或＋the most 构成最高级 careful － more careful － the most careful
　　 beautiful－more beautiful－the most beautiful
比较级、最高级的构成
不规则变化
比较级、最高级的构成
原级 比较级 最高级
good / well better best
many / much more most
bad / badly worse worst
little (少) less least
old older (新旧或年龄) oldest
elder (兄弟姐妹长幼关系) eldest
far farther (表示距离"更远") farthest
further (表示程度"更进一步") furthest
Practice
1.big __________ _________ 2. high __________ __________
3. low __________ __________ 4. deep __________ __________
5. easy __________ __________ 6. far __________ __________
7. happy __________ _______ 8. loud __________ __________
9. great __________ __________ 10. close __________ __________
11. amazing_______________ ________________
12. interesting______________ ________________
13. well __________ __________ 14. little __________ __________
写出下列单词的比较级和最高级
bigger
biggest
higher
highest
lower
lowest
deeper
deepest
easier
easiest
farther
farthest
happier
happiest
louder
loudest
greater
greatest
closer
closest
more amazing
most amazing
more interesting
most interesting
better
best
less
least
Grammar Points
形容词 / 副词 原级
原级比较句型结构
e.g I think the Huangguoshu Waterfall is as amazing as Hukou Waterfall .
Tom runs as fast as Jim.
1
相等比较：
as adj. as / as adv. as
2
不足比较：
e.g The Yellow River is not as / so long as the Yangtze River .
The Yangtze River dosen’t travel as /so far as the Nile River.
not as (so) adj. as / not (so) as adv. as
Grammar Points
形容词 / 副词 比较级
比较级句型结构
e.g The Yangtze River is longer than the Yellow River.
The Nile River travels father than the Yangtze River.
1
adj./ adv.比较级 than 比较对象
2
越来越...
e.g The Mount Qomolangma is growing taller and taller.
The life level is better and better.
adj./ adv.比较级 and adj./ adv.比较级
用于两者进行比较
more and more + adj./ adv. 原级
e.g AI is more and more popular.
The usage of comparatives
形容词或副词的比较级+than
eg: The Yangtze River is longer than the Yellow River.
“比较级+and+比较级” 或“more and more+原级” 表示“越来越……”
eg: Summer is coming. It's getting hotter and hotter.
“the +比较级...，the+比较级...”表示“越……, 就越……”
eg: The more you read, the more you know.
The usage of comparatives
A+ 谓语动词 + the + 比较级 + of the two (+ 名词复数)
表示“两者中较…的那个”
eg: Mike is the taller of the two boys.
Which/Who + 谓语动词 + 比较级, A or B 表示“ A和B哪个/谁更…… ”
eg: Which city is larger, Beijing or Shanghai
A + be + 倍数 + 形容词比较级 + than + B 表示“A是B的…倍…”
eg: Our school is three times bigger than yours.
The usage of comparatives (比较级表示最高级)
主语 + 谓语动词 + 比较级 + than any other + 单数名词 + 范围.
eg: The Yangtze is longer than any other river in China.
主语 + 谓语动词 + 比较级 + than the other + 复数名词 + 范围.
eg: Qomolangma is higher than the other mountains in Asia.
◆ “数词 + times + 比较级 + than”表示“……是……的几倍”
= 倍数+ as +原级 +as …
eg: The Nile is two times longer than this river.
The Nile is three times as long as this river.
强调比较级的比较程度或语气时，形容词比较级前面可以由much, even,far,a little,a bit,a lot等来修饰。
The usage of superlatives
(the+)最高级(+名词) + in/of/among短语, 意为“……中最……的”
eg: I think spring is the best time of a year.
one of the +形容词最高级+可数名词复数 + in/of 短语
“······中最······的······之一”
eg: Hangzhou is one of the most beautiful cities in the world.
the +序数词+形容词最高级+可数名词单数+ in/of 短语,
意为“在…中是第几……的……”
eg: As we all know, the Yellow River is the second longest river in China.
“Which/Who...(the+) 最高级,A, B or C ” 意为“哪个/谁是最...., A, B还是C ”
eg: Who sings best in your class, Lily, Tom or Jack
in +范围
of +同类特定群体
among +同类事物/人
Practice
用所给词的适当形式填空
1.The Yellow River is _________ (long) than the Huaihe River.
2.Mount Tai is the _________ (high) of the two mountains in Shandong.
3.The sea is getting more and more _________ (beautiful) with environmental protection.
4.This lake is the _________ (deep) in our province.
5.This river is three metres __________ (wide) than that one.
6.Hainan Island is the second __________(large) island in China.
7.The sunset over the ocean is one of the _______________ (amazing) sceneries in the world.
longer
higher
beautiful
deepest
wider
largest
most amazing
4c Let’s learn .
My friends and I visited Victoria Falls in Africa last year. Visiting one of the world’s largest waterfalls was a magical experience. As we went closer to the falls, the noise of the water slowly grew louder and louder. Then, right before our eyes, the waterfall appeared. It went on for as far 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 most amazing experience of our trip!
feel sb./sth. do sth.
scary - scariest
较大数字的表达与读法
Do you still remember how to read 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.
4a
读作：nine million
读作：eleven thousand
读作：six thousand and three hundred
注意:
1. 从数字的右端向左数, 每三位数加一个逗号。
2. 从右向左，第一个逗号处读thousand (千), 第二个逗号
处读million (百万), 第三个逗号处读billion (十亿)。
3. 读数时, 通常在hundred后加and; 若百位数为0, 则在
thousand后加and。
4. 英语中无直接表示“万”和“亿”的单位词, 需用thousand
和million表达, 如“一万”是ten thousand、“一亿”是one
hundred million。
Practice
写出或读出下列数字。
2,674 → ______________________________________________
164,213,430 → ________________________________________
_________________________________________
18,357,089 → _________________________________________
__________________________________________
twenty-eight thousand, six hundred and fifty-six ___________
forty million, four hundred and twenty-four thousand _______
two thousand six hundred and seventy-four
one hundred and sixty-four million, two hundred and thirteen thousand, four hundred and thirty
eighteen million, three hundred and fifty-seven thousand, and eighty-nine
28,656
40,424,000
Production
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.
Write or spell out the numbers.
4b
5,895
乞力马扎罗山
25,768
/ kju b k/ adj. 立方的
/ma l/ n. 英里
因加瀑布
东非大裂谷
塔克拉玛干沙漠
three hundred and thirty-seven thousand
four thousand
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!
large　amazing　far　close　loud
largest
closer
louder
far
most amazing
Complete the passage with the correct forms of the words in the box.
4c
How does the writer make the description vivid
Tip:
Find the answer by looking for “sensory words” — words that tell us what we see, hear, and feel.
词
讲
练
It went on for as far as the eye could see.它一眼望不到头。（教材P35 4c）
as far as... 远至（某处）
（2024·四川遂宁·中考真题）Everything is possible ________ you work hard.
A. as much as B. as soon as C. as long as D. as far as
Language points
拓展：as far as... 就……的限度，到……的程度
相关短语&例句
as far as I/we know 据我/我们所知
as/so far as I can see 依我看
1. As far as we know, the Sahara is the biggest desert in the world.
据我们所知，撒哈拉沙漠是世界上最大的沙漠。
2.As far as I can see, there is no difference between the two computers.
依我看，这两台电脑没有差别。
D
Sum up what you have learned.
形容词和副词的比较级与最高级
较大数字的表达
规则变化、不规则变化
比较级和最高级的构成
Summary
比较级的用法
最高级的用法
1. 比较级+than
2. the + 比较级, the + 比较级
3. 比较级 + and + 比较级
more and more + 形容词/副词原级
1. (the +) 最高级 + in/of/among短语
2. one of the + 形容词最高级 + 可数名词复数 + in/of短语
3. “Which/Who...(+the)+最高级, A, B or C ”
4. the + 序数词 + 形容词最高级 + 可数名词单数 + in/of短语
thousand
million
9，365,278,689
billion
用所给词的适当形式填空。
Exercise
1.(2025·扬州中考) The international influence of Yangzhou is getting ________ than before. (strong)
2.(2025·德阳中考改编) Lin Tao runs ________(fast) than his classmates. He is the running star in his class.
3.(2025·达州中考) The Yangtze River is the ________(long) river in China.
4.(2025·白银中考) The more we communicate with our parents, the _______
(good) we'll understand each other.
5.(2025·成都中考改编) Miss Li always has a lot of work to do. For her, nothing is _______________(important) than a proper plan.
6.(宁波中考改编) For most of the students, June is always the ________(busy) month in a year.
7.Qian Xuesen, father of China's space program, is one of the ________(great) scientists in the world.
stronger
faster
longest
better
more important
busiest
greatest
Homework
基础作业
进阶作业
拓展作业
复习并掌握所学的形容词和副词的比较级和最高级的语法知识并完成课后练习。
绘制一张关于形容词和副词的比较级和最高级的语法知识思维导图。
上网查询关于云南之最奇观的介绍，用数据、比较级、最高级等描述2~3处自然景观。
https://www.21cnjy.com/help/help_extract.php
让备课更有效
www.21cnjy.com
Thanks!/ 让教学更有效 精品试卷 | 英语学科
一、教学目标
（一）语言能力
掌握形容词、副词最高级的规则变化与不规则变化。
熟练运用the + 最高级、one of the + 最高级、the + 序数词 + 最高级三大核心结构。
掌握英语大数（thousand/million）的读写规则。
（二）学习能力
能通过例句自主归纳最高级变形与用法规律。
能用思维导图梳理原级、比较级、最高级的逻辑关系。
（三）文化意识
了解用最高级描述自然奇观的英语表达，学会用英语介绍中外自然景观。
（四）思维品质
能辨析比较范围，对事物进行比较、排序，形成清晰逻辑判断。
二、教学重难点
重点：最高级构成规则、不规则变化、the + 最高级 + in/of用法。
难点：比较范围（in/of/among）辨析、易混句型区分、修饰词使用。
四、教学准备
多媒体课件、自然景观图片、练习题单、思维导图模板
三、教学过程
（一）导入：情境激趣（5 分钟）
展示长江、黄河、尼罗河图片，提问：
How long is the Yangtze River
What is special about it
引导学生用longest/second longest描述，引出本节课核心 ——形容词 / 副词最高级。
板书课题，明确学习目标。
（二）新知呈现：语法梳理（15 分钟）
1. 最高级概念
比较级：两者比较
最高级：三者及以上比较
2. 规则变化
一般情况：+er/+est（clever—cleverer—cleverest）
以 e 结尾：+r/+st（nice—nicer—nicest）
辅音 + y：变 y 为 i+er/est（easy—easier—easiest）
重读闭音节：双写尾字母 + er/est（fat—fatter—fattest）
多音节词：more/most + 原级（beautiful—more beautiful—most beautiful）
3. 不规则变化（重点记忆）
表格
原级 比较级 最高级
good/well better best
many/much more most
bad/badly worse worst
little less least
old older/elder oldest/eldest
far farther/further farthest/furthest
4. 最高级核心句型
the + 最高级 + in/of/among（范围）
one of the + 最高级 + 名词复数
the + 序数词 + 最高级 + 名词单数
Which/Who+the + 最高级，A, B or C
5. 大数读写
三位分节：thousand（千）、million（百万）、billion（十亿）
无 “万 / 亿”，用 ten thousand/one hundred million 表达
（三）巩固练习：讲练结合（15 分钟）
变形练习：写出单词比较级与最高级（big/high/easy/far/well 等）。
句型填空：用所给词适当形式填空，强化 in/of 范围与核心句型。
课文填空：完成 4c 短文填空，巩固最高级在语境中的运用。
大数读写：完成 4b 数字读写练习，突破数字表达难点。
（四）拓展运用：输出表达（7 分钟）
小组活动：用最高级描述身边自然景观（如家乡最高的山、最长的河）。
展示分享：每组派 1 名代表发言，运用the + 最高级 /one of the + 最高级结构。
（五）课堂小结（2 分钟）
师生共同梳理：最高级变化规则 + 核心句型 + 大数读写。
发放思维导图模板，引导学生课后完善知识框架。
（六）作业布置（1 分钟）
基础作业：完成课后语法练习题，熟记不规则变化。
进阶作业：绘制比较级 & 最高级思维导图。
拓展作业：查找云南自然奇观，用数据 + 最高级写 2-3 句介绍。
四、板书设计
Unit 4 Grammar Focus
一、最高级构成
规则变化
不规则变化：good→better→best
二、核心句型
the + 最高级 + in/of
one of the + 最高级 + 名复
the + 序数词 + 最高级 + 名单
三、大数：thousand/million
七、教学反思
以自然奇观为情境，贴合单元主题，降低语法学习枯燥感。
注重 “观察 — 归纳 — 练习 — 运用”，符合初中生语法学习规律。
需关注学困生对不规则变化与 in/of 范围的掌握，课后加强个别辅导。/ 让教学更有效 精品试卷 | 英语学科
一、单项选择。
1.—Which is ______ natural wonder in the world, the Grand Canyon, the Sahara Desert or the Great Barrier Reef
—I think the Grand Canyon is.
A. great B. greater C. the greatest D. more great
2.The Yangtze River is one of ______ rivers in the world.
A. long B. longer C. the longest D. most long
3.The forest is becoming ______ because more trees are planted every year.
A. greener and greener B. green and green
C. more and more green D. greenest
4.This waterfall is ______ of the three in this area.
A. the most beautiful B. more beautiful C. beautifuler D. beautifulest
5.The National Library of China is ______ public library in Asia.
A. large B. larger C. largest D. the largest
6. In a DIY club, the more we practice, ______ we become.
A. the worse B. the worst C. the better D. the best
7. Journey to the West is one of ______ classic novels in China. People like reading it.
A. famous B. more famous C. the more famous D. the most famous
8. It is said that smart technology is making people ______ than before and doing them harm.
A. lazy B. lazier C. laziest D. the laziest
二、 用括号内所给单词的适当形式填空
1.The Yellow River is _________ (long) than the Huaihe River.
2.Mount Tai is the _________ (high) of the two mountains in Shandong.
3.The sea is getting more and more _________ (beautiful) with environmental protection.
4.This lake is the _________ (deep) in our province.
5.This river is three metres __________ (wide) than that one.
6.Hainan Island is the second __________ (large) island in China.
7.The sunset over the ocean is one of the _____________ (amazing) sceneries in the world.
三、根据括号内所给汉语注释写出单词的正确形式(每空一词)
1. The park is about one __________ (英里) from our school, so we can walk there in 20minutes.
2. There is a small __________ (池塘) in the garden, and little ducks often swim in it on sunny days.
3. The __________ (发展) of smartphones changes how we communicate.
4. Camels can walk for days in the hot __________ (沙漠) without drinking much water.
5. The water tank in our school can hold about50 __________ (立方) metres of water, enough for all students to use for a day.
6. Television is an effective __________ (方式) of communication.
八下Unit4 The Wonders Of Nature Section A (4a- 4d) 课堂练习参考答案：
单项选择。
1-8 CCAADCDB
二、用括号内所给单词的适当形式填空
1.longer 2. higher 3. beautiful 4. deepest 5.wider 6. largest
7.most amazing
三、根据括号内所给汉语注释写出单词的正确形式(每空一词)
1. mile 2. pool 3. development 4. desert 5. cubic6. means

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