(共43张PPT)
高中英语(人教版)必修三
Unit 4 Astronomy: the science of the stars
Period One
Vocabulary
Key words and expressions
1. in time
2. unlike
3. harmful
4. in one's turn
5. prevent ... from
6. pull
7. exist
8. break out
及时
prep. 与...不同
adj. 有害的;
轮到某人
阻止
v. 拉,拖
v. 存在
爆发
目录
in time
一词多义
01
05
harmful
02
03
in one's turn
04
prevent...from
用法
用法
词组辨析
07
搭配变化
08
break out
用法
06
pull
搭配义
unlike
词的辨析
exist
搭配变化
in time
01
in time: sooner or later; eventually 终于
e.g. I’ll see him in time.
in time (for sth. /to do sth.): not late 及时
She will be back in time to prepare dinner.
They were in time to produce carbon dioxide,
... , which were to make the earth’s atmosphere.
它们最终产生了二氧化碳……从而形
成了地球的大气层。
词汇详解
in no time
________
time相关的短语
at times
______
at a time ________
______________
从前
________
按时; 准时
at one time
______
for the time being
_____
at no time _ ______
有时
once upon a time
on time
决不,从不
曾经;一度
归纳拓展
每次; 依次
立刻, 马上
暂时
=from time to time
(1)用上述短语填空
1. You’ll succeed if you keep on studying hard.
2. These buses are never and the passengers are always complaining.
3. You can’t imagine this lake used to be a beautiful place in our city .
4. On hearing the good news,they jumped with joy .
5. did I tell you that you could use my car.
in time
on time
at one time
学后检测
in no time
At no time
部分倒装
02
unlike
like prep. 像
v. 喜欢
likely adj.可能的
__________________ 可能做…
_________________ 可能……
alike adj. 相似的,相同的
归纳拓展
dislike v. 不喜欢
be likely to do
unlike prep. 不同;不像
It is likely that.../to do
词汇详解
unlikely
Unlike other systems, this one is very easy to install.
(1) Unlike his father,Tom is humorous and easygoing.
(2) They are much alike in character.
(3) It is likely that he will go to Beijing this autumn.
= He is likely to go to Beijing this autumn.
语境助记
1. Lily _______ (喜欢) reading, but she ________ (不喜欢) watching TV. ________(与…不像) watching TV, reading is a highly active process. It’s _______(可能的) to keep our brain active.
2. Meanwhile, if we always watch too much TV, and do not do some reading, it’s __________(不大可能的) to pass the entrance examination.
3. Don’t do it this;it is a bad manner.
likes
dislikes
Unlike
likely
unlikely
学后检测
like
03
harmful
harmless
adj. 无害的
harmful相关的单词和短语
harmful
harm
n.
伤害,损害
对……无害
be harmful to
对……有害
adj.有害的
be harmless to
harm sb./sth.
对某人/某物有害
归纳拓展
& vt.
do sb./sth. harm
do harm to sb./sth.
语法填空:
As we all know, eating too much sugar can be
(harm)to children’s teeth.
句型转换:
Too much worry does harm to one’s soul and body.
Too much worry one’s soul and body.
学后检测
harmful
is harmful to
04
in one's turn
轮到某人;接着
in one’s turn
1. When it is in my turn to give a speech, I’m too nervous to speak.
2. It's your turn to make a decision.
3. They sang songs by turns / in turn.
4. We take turns to speak at the conference.
5. It is known that theory is based on practice and in turn serves practice.
语境助记
_________依次,轮流;
_________轮流;交替
________________________轮流做
______________________轮到某人做某事
in turn
by turns
take turns (in) doing/to do
It’s one’s turn to do sth.
归纳拓展
相应地;转而
用turn相关短语填空
(1)She will, ,be on duty tomorrow.
明天轮到她值日。
(2) to do housework.
我们轮流做家务。
(3) make the speech.
该轮到他发言了。
(4)The children called out their names .
孩子们逐一自报姓名。
in her turn
We take turns
It’s his turn to
in turn
/by turns
学后检测
05
prevent...from...
(1) His words can’t prevent us from buying books.
(2) The heavy rain prevented us going on, but we
didn’t lose heart.
(3) We must prevent the water from being
polluted.
(4) Lynn’s parents tried to stop her seeing him.
语境助记
prevent sth. (from) being V-ed
prevent … from …
阻止某人做…
prevent sb. from V-ing sth.
( )
prevent sb (from) V-ing sth.
stop sb (from) V-ing sth.
keep sb from V-ing sth.
keep sb doing sth 让某人一直做…
protect sb from … 保护某人免受…
归纳拓展
1) 语法填空:
No one can prevent the plans
_________ _ (carry) out.
2) 翻译:
He
(被阻止) attending the meeting for his absence from the meeting.
学后检测
being carried
was prevented/stopped/kept from
(from)
pull
06
pull
词汇详解
push-up
pull-up
push
n.拉(力);拖;牵引力;吸引力
vt. 拉,拽,拖,拔出,扯,抽出
1. To escape the pull of the earth, a rocket must reach a speed of 28,440 km/h.
2. Steam engines was used to pull the carriages.
3. Lena Pahlsson pulled out a handful of small
carrots and was about to throw them away.
(4) Larry pulled over, set the brake and got hold
of the fire extinguisher (灭火器).
n. /sing 吸引力
v. 拉;牵引
v. 拔出
在路边停靠
语境助记
pull
Page *
pull apart
pull down
pull in
pull out
pull out
归纳拓展
拉开;拆卸
拆毁
(火车等)到站,进站;驶向路边(或某处)停靠
pull over
(使) 停靠在路边
拔出
1. The bus ______ the bus station and the passengers got off one after another.
A. drove away B. pushed in
C. pulled in D. rushed in
2. “I have something for you” he said ___ from behind his back a small box.
A. searched B. found
C. raised D. pulled
学后检测
到站
拿出,抽出
C
D
3. I would rather ride my bike than crawl in the dirt on my hands and knees the thousands of weeds in our gardens.
A. controlling B. pulling
C. pushing D. keeping
学后检测
拔出,扯
B
exist
07
1. The technology for performing Bianlian in Chuan Opera only exists in China.
2. There existed dinosaurs on the earth a long time ago.
exist
词汇详解
vi. 存在;生存
_________________存在于…中
_______________________存在有…
________________靠…生活/生存
exist in
exist on/
There exists/ existed…
live on
existence n. 存在;生活
This is the oldest book in existence.
in existence
________________ _= begin to exist 产生;成立
= come into being
come into existence
归纳拓展
existing adj. 现存的;存在的
现存的;存在的
一. 语法填空:
1. It is said that this old building has _______ (exist) for more than three hundred years.
2. He doesn’t believe in the (exist) of God.
3.I can hardly exist the wage I’m getting. There is no more money left for expensive things.
二. 完成句子
When did the world
(产生)?
come into existence/
come into being
on
学后检测
existence
existed
break out
08
词汇详解
1. The Second World War broke out in September 1939.
2. A fire broke out in this hotel last night.
3. I was in a club in Brixton and a fight broke out.
break out?意为“爆发,突然开始”,常指战争、灾难或打斗等不愉快事件的发生。
outbreak n.
break in_________________
break into______________
break down________________
break up__________________
break through________________
break away from___________________
break out (战争、火灾等)突发;爆发
插话;破门而入
sp. 破门而入
出故障,坏掉;失败;(身体等)垮掉
粉碎;解散;分手,绝交
冲破,突破
脱离;逃脱
happen, occur, come about, take place vi.无被动
归纳拓展
Page *
用break短语的适当形式填空
1. When the fire ,many people were
shopping in the supermarket.
2. Sue often quarrels with her boyfriend. It is said that they have decided to .
broke out
break up
学后检测
3. Mother and I had a discussion about how to visit Beijing and my elder brother would sometimes
with a suggestion.
4. My brother’s bike yesterday,so he had to go to school by bus.
5. The thieves waited until it was dark enough to the house.
break in
broke down
break into
Try to finish their related words:
1. violent adj. 暴力的
_________ n. 暴力 _________ adv. 暴力地
2. puzzle n. 谜,难题;v.迷惑
______ adj. 困惑的 _______ adj. 令人困惑的
3. exhaust v. 用尽;耗尽
___________ adj. 感到疲惫的
___________ adj. 令人筋疲力尽的
violence
violently
puzzled
puzzling
exhausted
exhausting
总结归纳
Key words and expressions
1. in time
2. unlike
3. harmful
4. in one's turn
5. prevent ... from
6. pull
7. exist
8. break out
一词多义
词汇辨析
同源词
搭配拓展
近义短语
一词多义
变化搭配
短语拓展
I.?根据下面各句句意以及所给单词的首字母,写出该单词的正确形式。
1. She gave a gentle p____ on the rope, and the bell rang.
2. She’s got a bad cold and her voice is quite u________ her usual one.
3. Scientists want to know whether life e______ on other planets.
4. Smoking is h______ to health, but some people cannot get rid of it.
pull
unlike
exists
harmful
II.?填空。
1. She set the alarm so she’d wake up _______ _______ (及时) to get up.
2. Other reports said the fire ______ ____ (爆发) on a city bus at about 8:30 am as it passed near the zoo.
in
time
broke out
4. The bad weather __________ ________ _______ __ ______ (使我不能参加) the meeting yesterday.
5. She had not been friendly to Pete and he, ________ ________ ________ (轮到他), was cold to her when she came to stay.
prevented me
in his turn
from attending
1. Review the key words and phrases.
2. Preview the warming-up and
reading part of Unit 4.
Thanks
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