資源簡介

(共35張PPT)
Unit 3 Our digital lives
主題范疇：人與社會
主題群：科學與技術
子主題：
科學技術與工程，人類發明與創新
Key question
How has digital technology changed our lives
know some grammar rules of comparative and superlative adjectives.
use comparative and superlative adjectives flexibly to compare people or things.
express my attitude towards things correctly.
Learning objectives 學習目標
At the end of the class, I will be able to:
1. In the 1940s, the first computers were bigger than cars.
2. In Europe, potatoes are more popular than rice.
3. The boy is fatter than his sister.
4. Which student is the youngest in your class, Tom
5. The skirt is the cheapest one in the shop.
Look and say
Comparative and superlative adjectives
When we compare two people or things, we can use the comparative form of the adjective. When we compare more than two people or things, we can use the superlative form of the adjective.
While-learning
Sophie is tall.
Situation
Paul is taller than Sophie.
Hans is the tallest student in our class.
比較級
最高級
Read the sentences and pay attention to the parts in blue.
形容詞
Sophie
Paul
Hans
＊對兩者進行比較時，可以用形容詞的比較級形式來表達。
＊比較三個或三個以上的事物，可以用形容詞的最高級形式來表達。
Read the dialogue between Su Mei and Su Wen. Pay attention to the words in red.
Su Mei: Oh, what’s this
Su Wen: It’s a computer from the 1940s. You know what The first computers were bigger than cars. Nowadays, computers are much smaller and better.
Su Mei: I see. Besides size, what else is different
Su Wen: Computers today are much faster than before.
Su Mei: That must be true. Some computers are even smarter than human beings.
Su Wen: No, I don’t think so. I think human beings are the smartest. After all, we invented computers.
Adjective Comparative adjective Superlative adjective
big bigger biggest
smart smarter smartest
interesting more interesting most interesting
形容詞有三種形式：原級，比較級和最高級，表示形容詞說明的性質在程度上的不同。
To form comparative adjectives, we often add -er to an adjective with one or two syllables and use more with adjectives of three or more syllables.
We often use than after comparative adjectives.
To form superlative adjectives, we often add -est to an adjective with one or two syllables and use most with adjectives of three or more syllables.
We usually use the before superlative adjectives.
Let’s sum up the rules!
比較級用于兩者（人或物）之間，表示“其中一個比另一個更……”或“較……”，后面通常用連詞than連接另一個比較的對象。
The apple is bigger than the orange.
A 形容詞的比較級
taller
smaller
1) 一般情況下在詞尾加-er。
tall
small
2) 以不發音的字母e結尾的單詞在詞尾加-r。
nice
fine
nicer
finer
一、形容詞比較級的構成
3) 以重讀閉音節結尾的，且末尾只有一個輔音字母的單詞，雙寫該輔音字母，再加-er。
slim
4) 以“輔音字母+y”結尾的單詞，把y變為i，再加-er。
pretty
slimmer
bigger
prettier
easier
big
easy
5) 多音節詞和部分雙音節詞的比較級和最高級是在詞前加more。
interesting
difficult
independent
more interesting
more difficult
more independent
careful
useless
dangerous
more careful
more useless
more dangerous
多音節詞
部分雙音節詞
The white cat is fatter than the black cat.
白貓比黑貓胖。
1) 兩個人或事物之間比較時，常用“形容詞比較級+than”結構。
Mr Miller is much more popular than Mr Black in our school.
在我們學校，米勒老師比布萊克老師受歡迎得多。
2) 強調比較級的比較程度或語氣時，形容詞比較級前面可以由much, even, far, a little, a bit, a lot等來修飾。
二、形容詞比較級的用法
① Who is younger, John or Jimmy
約翰和吉米，誰更年輕？
② Which is heavier, this box or that box
這個盒子和那個盒子，哪個更重？
3) 有兩者供選擇，要表達“誰更……”或“什么更……”時，常用“Who / Which+be+形容詞比較級, A or B ”句型。
The busier he is, the happier he feels.
他越忙越高興。
4) “the+形容詞比較級+……, the+形容詞比較級+……”表示“越……，越……”。
I think the red one is the more useful of the two laptops.
在那兩臺筆記本電腦中，我認為紅色的更有用。
5) “the+形容詞比較級+of the two+(名詞)”表示“兩個中更……的”。
China is larger than any other country in Asia.
中國比亞洲的其他任何一個國家都大。
6) “形容詞比較級+than+any other+可數名詞單數”表示“比起任何一個更……”，該結構表示的是最高級含義。
The elephant is the biggest animal in the picture.
最高級用于三者或三者以上（人或物）的比較，表示“最……”。后面常用in或of短語來說明比較的范圍。
B 形容詞的最高級
tallest
smallest
1) 一般情況下在詞尾加-est。
tall
small
2) 以不發音的字母e結尾的單詞在詞尾加-st。
nice
fine
nicest
finest
一、形容詞最高級的構成
3) 以重讀閉音節結尾的，且末尾只有一個輔音
字母的單詞，雙寫該輔音字母，再加-est。
slim
4) 以“輔音字母+y”結尾的單詞，把y變為i，
再加-est。
pretty
slimmest
biggest
prettiest
easiest
big
easy
5) 多音節詞和部分雙音節詞的比較級和最高級是在詞前加most。
interesting
difficult
independent
most interesting
most difficult
most independent
careful
useless
dangerous
most careful
most useless
most dangerous
多音節詞
部分雙音節詞
1) 三者或三者以上的人或事物比較時，要用形容詞的最高級形式。常用結構為：the+形容詞最高級+名詞+表示范圍的in/of短語。
① He is the tallest student in our class.
他是我們班最高的學生。
② Today is the hottest day of the year.
今天是今年最熱的一天。
二、形容詞最高級的用法
① Who is the most beautiful, Susan, Betty or Peggy
蘇珊、貝蒂和佩吉，誰最漂亮？
② Which is the most difficult, Maths, English or History
數學、英語和歷史，哪個是最難的？
2) 三個人或事物比較，要表達“誰最……、什么最……”時，常用“Who /Which+be +the+形容詞最高級, A, B or C ”句型。
① It’s one of the cheapest hotels here.
② It is one of the greatest roles she has played.
3)“one of+the+形容詞最高級+可數名詞復數”表示“最……之一”。
它是這里最便宜的旅館之一。
這是她所扮演過的最重要的角色之一。
Su Wen: Did you watch that science show on TV last night It was about chess computers.
Su Mei: No, I didn’t. Was it interesting
Su Wen: Yes! Scientists designed (1)___________(early) chess computers in the 1950s. At the time, the computers could not beat human players. Even ordinary people were (2)________(good) than these first chess computers. But in 1997, a computer named Deep Blue won a chess match against the world champion. This was (3)_______________(famous) chess game against a computer in history.
Complete the conversation with the comparative or the superlative form of the adjectives in brackets.
the earliest
better
the most famous
Su Mei: Wow, that’s a big victory for artificial intelligence (AI)!
Su Wen: Indeed! Back then, Deep Blue was (4)________________(powerful) chess computer in the world. But now, an ordinary computer can beat (5)________(good) human players.
Su Mei: Well, that may be true, but humans invented AI. Also, computers cannot think like we do. That means humans are still (6)_________(smart) than computers!
the most powerful
the best
smarter
背景鏈接
深藍計算機 (Deep Blue) 是由IBM公司開發的象棋電腦。它是第一臺在常規時間控制下擊敗世界冠軍的計算機象棋系統。深藍計算機重1270公斤，有32個微處理器，每秒鐘可以計算2億步棋。它在1996年2月進行了對戰世界冠軍的第一場比賽，但被卡斯帕羅夫擊敗。隨后，深藍開始升級，并于1997年5月再次對抗卡斯帕羅夫，最終贏得了比賽。
Interview your teachers and classmates about their attitudes towards digital technology. Write questions with comparative and superlative adjectives before you start.
Which do you think is more convenient to read, e-books or print books
Doe ... make your life easier or harder
Is it safer to make new friends online or offline
…
Post-learning
Summarize the information you collected in Exercise 2 and share your findings with the class. You may begin your summary with the following sentences.
Most of my classmates / teachers think that it is more convenient to ... Some say it is safer / easier to ...
1. 比較級的用法
1) 兩個人或事物之間比較時，常用“形容詞比較級+than”結構。
2) 強調比較級的比較程度或語氣時，形容詞比較級前面可以由much, even, far, a little, a bit, a lot等來修飾。
3) 有兩者供選擇，要表達“誰更……”或“什么更……”時，常用“Who / Which+be+形容詞比較級, A or B ”句型。
Review
4) “the+形容詞比較級+……, the+形容詞比較級+……”表示“越……，越……”。
5) “the+形容詞比較級+of the two+(名詞)”表示“兩個中更……的”。
6) “形容詞比較級+than+any other+可數名詞單數”表示“比起任何一個更……”，該結構表示的是最高級含義。
2. 最高級的用法
1) 三者或三者以上的人或事物比較時，要用形容詞的最高級形式。常用結構為：the+形容詞最高級+名詞+表示范圍的in /of短語。
2) 三個人或事物比較，要表達“誰最……、什么最……”時，常用“Who /Which+be +the+形容詞最高級, A, B or C ”句型。
3)“one of+the+形容詞最高級+可數名詞復數”表示“最……之一”。
一、選詞填空，并注意其形式。
1. This Maths problem is _________ than that one. All the pupils can work it out.
2. The red dress is ________________ of the three.
3. The Browns’ house is _______ than any other one in the village.
4. Cindy is ___________ than her sister when she does her homework.
5. Running is one of _______________ sports in our class. We run every day.
expensive, careful, big, popular, easy
easier
the most expensive
bigger
more careful
the most popular
1. 對史密斯先生來說，每個月的最后一天是最忙碌的。
As for Mr Smith, the last day of each month is _______ _______.
2. 農村生活比城市生活更寧靜。
Life in the countryside is ______ ______ that in the city.
3. 安娜的T恤比她姐姐的便宜得多。
Anna’s T-shirt is _______ _______ than her sister’s.
4. 西湖是杭州最有名的景點之一。
The West Lake is _______ _______ _______ _______
_______ attractions in Hangzhou.
二、根據所給漢語意思提示，完成下列句子。
the
busiest
quieter than
much cheaper
one of the most
famous
5. 杰瑞和大衛誰更勇敢？
Who is _______, Jerry or David
6. 我認為張老師是我們學校最優秀的中文老師。
I think Mr Zhang is _____ ______ _________ Chinese teacher in our school.
7. 蘇珊在俱樂部里比其他任何一個成員都努力。
Susan is _______ ______________ _______ any other member in the club.
8. 那三位醫生中，馬醫生最友好。
Dr Ma is _________ _________ of the three doctors.
braver
the most excellent
more hard-working than
the friendliest
Make some sentences using the comparative and the superlative of adjectives (at least 10).
Finish the exercises.
Preview Speaking on P43.
Thank you!

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