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(共15张PPT)
Unit 4 Amazing Plants and Animals
Section A What can plants and animals do
Grammar Focus (3a-3c)
Learning Objectives
In this lesson, you will:
1. master the format and usage of superlatives.
2. talk about more plants and animals using superlatives.
The Extreme Animal & Plant Challenge
What’s the largest and heaviest animal in the world
It’s the blue whale.
What animal runs the fastest on the land
It’s the cheetah
What’s the biggest animal on the land
It’s the African elephant.
What’s the smallest bird in the world
It’s the hummingbird(蜂鸟).
What plant grows the fastest
It’s the bamboo.
What plant can survive in the driest desert
It’s the cacti(仙人掌).
The blue whale is the largest and heaviest animal in the world.
The biggest land animal in the world is the African elephant.
The cheetah runs the fastest among all land animals.
I think the most useful plant in the world is bamboo.
It is perhaps the most interesting plant in the world.
Grammar Focus
3a
Read the sentences and notice the words in bold. What are the ways to form a superlative adjective or adverb
最高级的构成
（1）一般直接在词尾+est
tall—tallest short—shortest fast—fastest high—highest
（2）以不发音的e结尾的词，在词尾+st
nice—nicest late—latest wide—widest large—largest
（3）以辅音字母+y结尾的双音节词，变y为i，再+est
heavy—heaviest busy—busiest easy—easiest early—earliest
（4）重读闭音节，且末尾只有一个辅音字母的词，双写该辅音字母，再+est
big—biggest hot—hottest thin—thinnest fat—fattest
（5）多音节词和部分双音节词，在原级前+most构成最高级
slowly—most slowly beautiful—most beautiful
important—most important popular—most popular
（6）不规则变化
good/well—best bad/badly—worst
many/much—most little—least
far—farthest/furthest
最高级的用法
（1） 表示三者或三者以上(人或事物)的比较，其中有一个在某一方面超过其他几个，后面可用带有of、in、among的短语等来说明比较的范围。形容词最高级的前面一般要加定冠词the，副词最高级前的the可以省去。
e.g. In my country, July is the hottest month of the year.
The cheetah runs (the) fastest among all land animals.
（2）用于“one of the +最高级+复数名词”，表示“最……之一”。该结构作主语时，谓语动词用单数。
e.g. She is one of the most hard-working students in our class.
The Great Wall is one of the most famous attractions all around the world.
（3）用于“the+序数词+最高级+单数名词”，表示“第几最……”
e.g. The Yellow River is the second longest river in China.
The Yangtze River is the third longest river globally.
3b
Complete the sentences with the superlative forms of the words in brackets.
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
the cutest
the most beautiful
3. Look at that butterfly! It has
_______________(colourful) wings.
4.Which animal jumps ___________(high), the lion, the monkey, or the tree frog
the most colourful
the highest
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 largest
heaviest
Complete the passage with the superlative forms of the words in the box.
3c
ancient beautiful common good popular
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_______________. Thousands of tourists come to
the most ancient
the most beautiful
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.
the best
the most common
the most popular

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