资源简介

(共32张PPT)
Unit 4 Inventions
主题范畴：
人与社会
主题群：
科学与技术
子主题：
科学技术与工程，人类发明与创新
Key question
What makes an invention great
understand some irregular adjective forms;
grasp the structure and usage of “(not) as ... as”；
use “(not) as ... as” with many+countable nouns and much+uncountable nouns to compare amounts；
combine the irregular adjective forms and “(not) as ... as” structure to talk about some great inventions.
Learning objectives 学习目标
At the end of the class, I’ll be able to:
Comparative and superlative adjectives
原级
比较级
最高级
即原形，形容词原义
表示较高程度的含义
表示最高程度的含义
adj.
comparatives + ____
______ + superlatives
形容词比较级和最高级的构成分为规则变化和不规则变化。
than
the
Review
Read the passage and pay attention to the words in bold.
Many inventions make people’s lives better. For example, the invention of the wheel allowed people to travel farther distances. However, there are bad inventions too. A magazine once picked the top ten worst inventions in human history, such as cigarettes and plastic bags. Many people think these inventions make the world a worse place to live in.
形容词的不规则变化：
good, bad and far
1. My English is good, and my sister’s is better, and my brother’s is the best.
2. This novel is bad. That one is worse and it is one of the worst books I’ve ever read.
3. Our school is not far from here. The hospital is farther/further down the road. The book shop is the farthest/furthest from here.
Observe the sentences and try to complete the table.
Adjective Comparative adjectives Superlative adjectives
good
bad
far
better
best
worse
worst
farther
/further
farthest
/furthest
farther和further都是far的比较级，表示“（空间、距离或时间上）更远的；较远的”时，两者可以相互转换。
farther和further的异同
① Cook for a father/further 2 minutes.
② The father/further hill is five kilometres away.
再煮两分钟。
那座更远的小山在五公里以外。
Attention
① We have decided to take no further action.
② Have you any further questions
我们决定不采取进一步行动。
你还有问题吗？
最高级the farthest/furthest的用法和比较级的用法类似。
(2) further可以用于抽象概念的比较，表示“（程度上）更进一步的；更深远的”，farther则没有这个意思。
Look at the school report below. In pairs, ask and answer questions about it.
1. S1: Who ______________ in Art, Belinda or Daisy (good)
S2: ________________________________________
2. S1: Who ________________ in Art (good)
S2: ________________________________________
got a better mark
Daisy got a better mark in Art than Belinda.
got the best mark
Alice got the best mark in Art.
Example:
Practice
3. S1: Who _________________ in Science,
Paul or Martin (good)
S2: ______________________________________.
4. S1: Who _________________ in Science,
Eric or Alice (bad)
S2: ______________________________________.
got a better mark
Paul got a better mark in Science than Martin
got a worse mark
Eric got a worse mark in Science than Alice
Look at the map below. In pairs, ask and answer questions about it. Follow the example.
Whose home …, Alice’s or Daisy’s
S1: Whose home is farther/further from school, Alice’s or Daisy’s
S2: Alice’s home is farther/further from school than Daisy’s.
Example:
2. Whose home ..., Martin’s or Pauline’s
3. Whose home ..., Alice’s, Belinda’s or Eric’s
S1: Whose home is farther/further from school, Martin’s or Pauline’s
S2: Martin’s home is farther/further from school than Pauline’s.
S1: Whose home is the farthest/furthest from
school, Alice’s, Belinda’s or Eric’s
S2: Alice’s home is the farthest/furthest from school.
Other irregular words
Adjectives Comparative forms Superlative forms
many/much more the most
little less the least
ill worse worst
old older/elder oldest/eldest
相关拓展
(not) as … as …
= The Simpsons is as interesting as The Sponge Bob.
① The Simpsons is interesting.
② The Sponge Bob is interesting, too.
Can you figure out the usage of “as … as”
Look and say
as … as …表示双方程度相同时的比较
We use (not) as … as to say that things or people are (not) equal in some way.
Early computers were as big as a room.
With electric lights, people can do as many things in the evenings as they can in the daytime.
A candle does not produce as much light as a light bulb.
Let’s sum up the rules!
We use (not) as ... as with the _________ of adjectives to compare things and people.
We use (not) as ... as with many+the ___________ of a countable noun or much+an __________ noun to compare amounts.
base form
plural form
uncountable
His room is as big as mine.
He runs as fast as I do.
You should keep the room as clean as your brother’s.
1. (not) as … as用于表示同级之间的比较, 中间可加形容词、副词原级。意思是“和……一样……”。
as + 形容词或副词原级 + as
Find out more about (not) as ... as ...
2. as … as的否定形式是not as … as，表示后者比前者强，意为“不如……那样”。not as ... as中第一个as可以用so替换，即not so ... as。
His room is not as/so big as mine.
He doesn’t run as/so fast as I do.
Robert is not as/so old as he looks.
not as/so + 形容词或副词原级 + as
3. 若涉及数量或程度，可用“as much + 不可数名词 + as”和“as many + 可数名词复数 + as”。
There are as many students in her class as in our class.
In fact it cost me as much as 100 dollars.
Take as much time as you like.
4. as … as的其他用法：
as … as possible / as … as sb. can 尽可能……
We went there as soon as possible.
He went there as quickly as he could.
常用短语：
as soon as 一……就……
as much as 和……一样多；多达
as long as 和……一样长；只要
as well as 和……一样好；和……一样
as far as 远达
as … as也可表示倍数：
This room is twice as big as that one.
Look at the pictures below and complete the following sentences.
1. The Hotwave and the Micro-King
____________________(expensive) the Speedcook and
the Superoven.
2. The Speedcook ___________(wide) the Superoven.
Example:
are not as expensive as
is as wide as
Practise
3. The Hotwave ___________(high) the Micro-King.
4. The Micro-King _______________(deep) the Speedcook.
5. The Hotwave and the Micro-King _______________(wide) the Speedcook and the Superoven.
is as high as
is not as deep as
are not as wide as
Some historians have made a list of great inventions in the past 1,000 years. Look at the list and complete the conversation below with the correct form of the words in brackets.
Year Invention
1041-1048 movable type
1440-1450 printing press
1796 vaccine
1876 telephone
1879 light bulb
Year Invention
1885 car
1895 radio
1903 airplane
1925 television
1940s computer
Su Wen: I think movable type is the (1)_______(good) invention in the past 1,000 years. Thanks to this, people could have books to read.
Su Mei: Well, it is an important invention. However, I think the light bulb is an even (2)________(good) invention. It was hard to read and write at night before we had light bulbs. Which modern invention do you think is the most important
Su Wen: Definitely the computer. It has been almost (3)________________(important, as ... as) the movable type.
Su Mei: The things on the list are all great inventions. After all, life would be much (4)_________(bad) without them!
best
better
as important as
worse
(1) Which invention do you think is more important, the printing press or the light bulb Why
(2) Which invention do you think is the most important Why
(3) What other inventions do you think are as useful as those on the list
Look at the list of the great inventions in the past 1,000 years in Exercise 1. Then ask and answer the questions in pairs.
(1) Which invention do you think is more important, the printing press or the light bulb Why
I think the printing press is more important. Because it helped spread knowledge. More books could be made, so more people learned to read.
(2) Which invention do you think is the most important Why
I think the computer is the most important. It helps us work, study and talk to friends quickly.
(3) What other inventions do you think are as useful as those on the list
I think the smartphone is as useful. It can call, take photos and let us use the Internet.
一、用括号中所给单词的正确形式填空。
1. Mr White felt much ________(good) after taking a rest.
2. Of the three girls, Lily has ________(much) pocket money.
3. Alan has made as many ________(card) as his friend Tony.
4. A large number of students want to go to university for ________(far) education.
5. Because of the new law, I think there will be ________ (little) pollution in the future than now.
better
the most
cards
further
less
二、根据所给汉语提示，完成下列句子。每空一词。
1. 那个地区的空气污染正变得越来越糟糕。
Air pollution in that area is becoming _____ ___ ______.
2. 丹尼尔和他的双胞胎兄弟一样高。
Daniel is ___ ______ ______ his twin brother.
3. 多吃蔬菜少吃肉对我们的健康有益。
Eating ________ vegetables and ________ meat is good for our health.
4. ——琳达和你有一样的裙子。
——是的。她的更好，但是没有我的贵。
— Linda has the same skirt as you.
— Yeah. Hers is ______ but ____ ____ ________ __ mine.
worse and worse
as tall as
more less
better not as/so expensive as
1. I’m ____________(thin) Mike. I’m fatter than him.
2. She was __________(tired) me because we went hiking together.
3. It’s not cold today, but it is _____________(warm) yesterday.
4. Ann’s bicycle was __________(cheap) mine. We paid the same price.
5. Her garden is _____________(beautiful) Jane’s. She’s really done a good job.
not as thin as
as tired as
not as warm as
as cheap as
as beautiful as
三、根据句意，用(not) as … as完成下列句子。
1. Make some sentences using the comparative and the superlative of good, bad, far, and not as … as. (at least 10)
2. Finish the exercises.
3. Preview Speaking on page 59.

展开更多......

收起↑