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(共14张PPT)
Unit 4
Amazing plants and animals
Grammar Focus
回顾比较级的变化规则，观察本单元最高级句子，整理出最高级的变化规则并举例。
比较级/最高级变化规则
搜索
1 .一般情况下在词尾加-er/-est ;
例：fast-faster-fastest; long-longer-longest
2. 以e结尾的单音节词加-r/-st ;
例：cute-cuter-cutest; large-larger-largest
3. 以辅音字母加y结尾的词，变y为i再加-er或-est ;
例：heavy-heavier-heaviest; funny-funnier-funniest
4. 以重读闭音节结尾，且末尾只有一个辅音字母的词，先双写这个辅音字母，再加-er或-est ;
例：big-bigger-biggest; thin-thinner-thinnest;
5. 多音节或部分双音节词在原级前加more或most ;
例：beautiful-more beautiful-most beautiful;
useful-more useful-most useful
比较级/最高级变化规则
搜索
不规则变化
原级 比较级 最高级
good/well better best
bad/badly/ill worse worst
many/much more most
little less least
far farther/further farthest/furthest
tall
taller
Used to compare two people, things, or groups.
Comparative
(比较级)
tallest
Used to compare three or more people, things, or groups.
Superlative
(最高级)
形容词最高级前要加定冠词the，副词最高级前的the可省略。当有形容词性物主代词修饰时，可不加the。
It is the most beautiful garden in the city.
He is the lowest of the three.
He runs (the) fastest.
He is the fastest runner in the class.
He is the youngest and tallest boy in his class.
She plays volleyball (the) best in her class.
He is my best friend.
最高级的常用宝藏句型
1.主语+ be+ the+形容词最高级+in/of ...
The blue whale is the largest and the heaviest animal in the world.
2.主语+实义动词（+the）+副词最高级+in/of/among ...
The cheetah runs the fastest among all land animals.
3.主语+be+ one of the+形容词最高级+可数名词复数+in/of ...
Bamboo is one of the fastest-growing plants in the world.
最高级的常用宝藏句型
1. 疑问词+ be+ the+形容词最高级，A、B or C？
Which animal is the biggest one, elephant, blue whale or rhino
2. 疑问词+助动词+主语+动词原形（+the)+副词最高级，A、B or C？
Which animal do you like best, pandas, cats, dogs
3. 主语+be + the+序数词+形容词最高级+可数名词单数+in/of短语
Africa is the second largest continent of the seven continents.
形容词副词最高级的特殊用法
1. 最高级前可用序数词，二者共同修饰后面的名词，结构为：
the+序数词+形容词最高级+名词单数。
The Yellow River is the second longest river in China.
黄河是中国的第二长的河。
2. 最高级前可加one of ，结构为：one of +the +形容词最高级+名词复数，
表示“最….的之一”。
He is one of the smartest students in this school.
他是这所学校中最聪明的学生之一。
上海是中国最繁华的城市之一。（提示：“one of...” 结构, busy ）
2. 在所有运动中，汤姆篮球打得最好。（提示：play basketball, well, sport ）
3. 猫、狗和兔子，哪种动物最可爱？（提示：animal, lovely ）
4. 数学、语文和英语，你最喜欢哪门学科？（提示：subject, like...the most ）
5. 长江是世界第三长河流。（提示：the Yangtze River）
6. 这座塔是这座城市里第二高的建筑。（提示：tower, building, tall）
7. 熊猫是世界上最受欢迎的动物之一。
课堂练习
上海是中国最繁华的城市之一。（提示： “one of...” 结构, busy ）
2. 在所有运动中，汤姆篮球打得最好。（提示：play basketball, well, sport ）
3. 猫、狗和兔子，哪种动物最可爱？（提示：animal, lovely ）
4. 数学、语文和英语，你最喜欢哪门学科？（提示：subject, like...the most ）
Shanghai is one of the busiest cities in China.
Among all sports, Tom plays basketball the best.
Which animal is the loveliest, cat, dog or rabbit
Which subject do you like best, math, Chinese or English
5. 长江是世界第三长河流。（提示：the Yangtze River）
6. 这座塔是这座城市里第二高的建筑。（提示：tower, building, tall）
7. 熊猫是世界上最受欢迎的动物之一。
The Yangtze River is the third longest river in the world.
This tower is the second tallest building in this city.
Pandas are one of the most popular animals in the world.
Complete the sentences with the superlative forms of the words in brackets.
3b
1. Among all animals, I love pandas the best. I think
they are ___________(cute) animals in the world.
2. Which do you think is __________________(beautiful),
the rose, the peony, or the lotus flower
3. Look at that butterfly! It has ________________
(colourful) wings.
4. Which animal jumps ___________ (high), the lion,
the monkey, or the tree frog
5. The elephant birds were ___________ (large) and
___________(heavy) birds ever on earth. Some could
stand up to three metres tall and weigh up to 860 kg.
the cutest
the most beautiful
the most colourful
the highest
the largest
the heaviest
3c
Complete the passage with the superlative forms of the words in the box.
The ginkgo tree is one of ________________ living trees on earth. Ginkgo trees
first appeared over 200 million years ago. Chinese people love the ginkgo, as
it is a symbol of hope and long life. Many Chinese believe that the old ginkgo
tree in the Zhongnan Mountains in Shaanxi Province is ________________. This
tree is over 1,400 years old. Thousands of tourists come to see it each year,
especially in mid-October, as it is ________________time to see it. The ginkgo tree is one of ________________trees in streets, parks, and gardens across China. When autumn comes, one of ________________activities is to take a walk under ginkgo trees. People believe the bright yellow leaves can bring joy to their heart.
ancient beautiful common good popular
the most ancient
the most beautiful
the best
the most common
the most popular

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