(共31张PPT)
Unit 5
Look into Science
Unit 5 Look into Science
Lesson 25
Ⅰ. 根据汉语提示写出下列单词或短语
1. 倒出; 倾倒 v. _____
2. 力量; 迫使 n. & v. _____
3. 压力, 压强 n. ________
pour
force
pressure
4. correct作形容词, 意为“ ______________”, 还可作动
词, 意为“改正, 批改”; 其副词形式是“ ________”, 意为
“ ______________”?
5. 把……翻转; 倒过来 __________________?
6. 涌出 ________?
7. 把……拿开 __________?
正确的; 恰当的
correctly
正确地, 得体地
turn. . . upside down
pour out
take . . . off
8. 用……装满…… _____________
9. 用……盖住…… ________________
fill. . . with. . . .
cover. . . with . . . ?
Ⅱ. 根据汉语提示完成下列句子
1. 你们能猜出将会发生什么吗?
Can you guess _____ ____ _______?
2. 我认为纸板会托住水。
I think the cardboard will ____ ___ _____.
what
will
happen
hold
the
water
3. 那就是所说的科学方法。
______ _____ the scientific method.
4. 我确信我的理论, 布莱恩可以在你的头上方做这个实
验, 而且我知道你不会变湿。
I ___ __ ____ __ my theory ____ Brian can do the
experiment ____ your head and I know you _____ ___
____.
That’s
called
am
so
sure
of
that
over
won’t
get
wet
5. 空气的力量可以使水待在广口瓶里。
The force of the air _____ the water __ ___ ___.
6. 我得出的结论是空气比我想象的更强大。
I conclude ____ air is ________ ____ _ _______.
keeps
in
the
jar
that
stronger
than
I
thought
Ⅲ. Read the text and answer the questions
1. Why does Jenny ask Brian do the experiment over
Danny’s head?
______________________________________________
___________________?
Because she thinks the water will stay in the jar. And
Danny won’t get wet.
2. What does Jenny conclude?
_____________________________________________
_________?
The air pressure helps the cardboard hold the water
in the jar.
要点1 take. . . off 把……拿开 ?
Step 1难点·探
(1)take . . . off 与take off 的区别是什么?
(2)常见的take相关短语有哪些?
Step 2语境·悟
*Then I turn the jar upside down and take my hand off the cardboard.
然后我将广口瓶倒置并把手从纸板上拿开。(P66)
*You can take off your sunglasses in the room.
在屋里你可以摘掉你的太阳镜了。
*Hurry up! The plane is about to take off.
快点! 飞机就要起飞了。
Step 3知识·得
take. . . off 与take off的词义辨析
take. . . off “把……拿开, 使某物离开或脱离……”, 其中off为介词, 相当于take away. . . from. . .
take off 脱掉, 取下(衣、帽、鞋、眼镜、手表等)
起飞, 匆忙离开
放假, 休假
【拓展】
Step 4考点·练
( )①Please ________ your clothes ________ my
bed. I will go to sleep.
A. put; away B. take; off
C. turn; off D. put; on
B
②(2018·本溪中考改编)——飞机什么时候起飞?
——今天下午两点。
—When ____ the plane ____ ___?
—At 2: 00 this afternoon.
will
take
off
③你的外套很厚。如果你感觉热了, 你可以脱下来。
Your coat is very thick. You can ____ __ ___ if you feel
hot.
take
it
off
要点2 enough adj. 充分的; 足够的?
adv. 充分地; 足够地?
Step 1难点·探
(1)enough在所修饰词的什么位置?
(2). . . enough to do可以转换为什么句式?
Step 2语境·悟
*It is strong enough to hold the water.
它有足够的力量托住水。(P66)
*I have enough money to buy a car.
我有足够的钱来买辆车。
Step 3知识·得 enough 的两种用法
(1)enough 与修饰词的排队顺序
enough 作形容词时, 置于名词前、后均可
作副词时, 置于所修饰的形容词、副词之后
(2)enough to do sth. 常与too. . . to或so. . . that进行句型转换
Tom isn’t old enough to go to school.
→Tom is too young to go to school.
→Tom is so young that he can’t go to school.
Step 4考点·练
( )① (2018·郴州中考)—May I be allowed to
choose a summer course?
—It’s up to you. You’re ________to make your own
decision. .?
A. too old B. enough old C. old enough
C
②(2018·绥化中考)My sister isn’t old enough to dress
herself. (改为同义句)
My sister is __ young ____ she can’t dress herself.
③我们有足够的时间来欣赏这美景。
We have _______ ____ __ _____ the beautiful scenery.
so
that
enough
time
to
enjoy
要点3 We have discovered that the air pressure?
helps the cardboard hold the water in the jar. ?
我们发现气压可以帮纸板托住广口瓶里的水。(P66)?
Step 1难点·探
(1)你会分析句子成分吗?
(2)这是简单句还是复合句?
Step 2句型·研
这是主从复合句。We作主语, have discovered 作谓语, the air pressure helps the cardboard hold the water in the jar在句中作宾语, 为宾语从句, that 是引出从句的引导词, 可以省略。句子结构如下图所示:
Step 3考点·练
( )①(2018·南京中考)Which of the following
sentences has an object clause(宾语从句)?
A. His mother called him Robbie when he was a baby.
B. On Mars you might see people who wear special
boots.
C
C. Mr Green tells us that we’d better use the Internet properly.
D. Our life has improved because the environment is getting better.
②约翰告诉他的小女儿地球从西到东运行。
John ____ his little daughter ____ the earth ____ from
the west to the east.
told
that
goes
(共20张PPT)
Unit 5 Look into Science
Lesson 26
Ⅰ. 根据汉语提示写出下列单词或短语
1. 浅的 adj. _______
2. hold 为动词, 意为“_____”, 其名词为“______”, 意为
“支托物; 持有者”。
3. light 为名词, 意为“光, 光线”; 还可作动词, 意为“___
___”, “lighter”为名词, 意为“ ______________”。
shallow
holder
点
燃
打火机; 点火器
支撑
4. match作动词, 意为“__________”; 作名词, 意为“火
柴”, 是_________, 还可意为“比赛, 对手”。
5. examine 作 _____, 意为“检查”, 其名词形式为
“___________”, 意为“考试, 检查”。
相称; 相配
可数名词
动词
examination
Ⅱ. 根据汉语提示完成下列句子
1. 倒半碟水。
Fill the dish ____ ___ with water. ?
2. 小心地把广口瓶放在蜡烛上方直到广口瓶的顶部倒
置在盘子上。
Carefully ___ the jar ____ the candle _____ the top of
the jar ____ on the dish.
half
put
over
until
rests
full
3. 当蜡烛停止燃烧的时候, 它已经用光了空气中所有的
氧气。
______ the candle _____ _______, it ___ ____ ___ all
the oxygen in the air.
4. 水会上升多少呢?
_____ ___ does the water rise?
When
stops
burning
has
used
up
How
far
5. 因为大约五分之一的空气是由氧气组成, 所以水上升
并且充满广口瓶的大约五分之一。
_______ about ____ ____ of the air is made up of
oxygen, the water ____ and ____ about one fifth of the
jar.
Because
one
fifth
rises
fills
Ⅲ. Read the text and answer the questions
1. How long should you make the candle burn before
you put the jar over it?
___________________. ?
Two or three minutes
2. Why does the water rise and fill about one fifth of
the jar?
_________________________________________
_______?
Because about one fifth of the air is made up of
oxygen.
要点1 use up 用光, 用完 ?
Step 1难点·探
(1)use up是什么结构的短语?
(2)常见的与up相关的短语有哪些?
Step 2语境·悟
* When the candle stops burning, it has used up all the oxygen in the air. 当蜡烛停止燃烧时, 它已经用完了空气中所有的氧气。(P68)
*Leave me some water to wash. Don’t use it up.
给我留点水来洗。 别用光了。
Step 3知识·得 use up的用法
use up意为“用完; 用光”, 是“动词 + 副词”短语。名词作宾语时, 名词可放在副词前, 也可放在副词后; 代词作宾语时, 代词则必须放在副词前。该短语相当于run out of. . . , 可用于被动语态。
【拓展延伸】 与up有关的短语
Step 4考点·练
( )①(2018·河池中考)The boy ran out of his
money to buy the book because he loved it very much.
.?
A. took up B. gave up
C. picked up D. used up
D
②——肥皂在哪里? —Where is the soap?
——抱歉, 我用完了。
—Sorry, I have ____ __ ___.
③(2018·曲靖中考)当我们班上最好的歌手出现时, 每个
人都兴奋地喊叫起来。
When the best singer in our class _______ ___,
everyone shouted with excitement.
used
it
up
showed
up
要点2 分数的表达法 ?
Step 1难点·探
(1)你知道分数的英语表达方法吗?
(2)分数短语在句中作主语, 谓语动词用单数形式还是复数形式?
Step 2语境·悟
*Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar. 因为大约五分之一的空气是由氧气组成, 所以水上升并且充满广口瓶的大约五分之一。(P68)
*Two thirds of the water around the world is polluted. 世界上三分之二的水被污染了。
Step 3知识·得
(1)分数的分子用基数词, 分母用序数词; 当分子大于1时, 分母要用复数形式; 分子和分母之间可以加连字符, 也可以不加。
(2)分数后面跟of短语作主语时, 谓语动词的单复数由of后面的名词的单复数决定。
【助记】
分子基数词, 分母序数词, 分子大于1, 分母加 s。
Step 4考点·练
( )①(2018·黄冈中考)—Dad, about ________of
our classmates wear glasses. ?
—Oh, that’s terrible. You all should take good care of
your eyes. .
A. three fourth B. third fourth
C. third fourths D. three quarters
D
( )②(2018·咸宁中考)—Nowadays China has
about 25, 000 kilometers of high-speed railways.
—That’s ________of the world’s total. ?
A. two third B. two-third
C. two thirds D. two three
C
(共25张PPT)
Unit 5 Look into Science
Lesson 27
Ⅰ. 根据汉语提示写出下列单词或短语
1. mystery为名词, 意为“_____; 不可解释的事物” , 其
复数形式为“_________”
2. 太阳系 ___________?
3. 在夜间 _______?
4. 浏览 ____________?
奥秘
mysteries
solar system
at night
look through
5. 出来, 出版 ________?
6. 属于 _________
7. 超过, 多余 _________?
8. 嘲笑 _______?
9. 数十亿计的 _________?
come out
belong to?
more than
laugh at
billions of
Ⅱ. 根据汉语提示完成下列句子
1. 我认为你发现不了一颗(行星), 除非你有一个大一点
的望远镜。
I _____ _____ you can find one ______ you have a
bigger telescope.
2. 事实上, 有你房子的两倍大!
________, ______ ___ ____ of your house!
don’t
think
unless
Actually
double
the
size
3. 好吧, 这值得一试, 即使我找不到一颗行星。
Well, it’s ______ a try, ____ __ I don’t find a planet.
4. 当他们到的时候, 丹尼在外面院子里。
______ they arrive, Danny __ _______ in the yard.
5. 科学家们寻找行星时, 他们用的是巨型望远镜。
Scientists ___ huge telescopes _____ they ____ ___
planets.
worth
even
if
When
is
outside
when
look
for
use
Ⅲ. Read the text and answer the questions
1. What is Danny studying?
___________________________?
2. What do scientists use to look for planets?
__________________________?
He is studying the solar system.
They use the huge telescopes.
要点1 unless conj. 除非, 如果不 ?
Step 1难点·探
(1)unless引导的条件状语从句的特点是什么?
(2)unless的同义词是什么?
Step 2语境·悟
*I don’t think you can find one unless you have a bigger telescope. 我认为你发现不了一颗(行星), 除非你有一个大一点的望远镜。(P70)
*Don’t ask me to explain unless you really don’t understand. 不要叫我解释, 除非你真的不懂。
Step 3知识·得
unless的用法
(1)unless作连词, 意为“除非, 如果不”, 引导条件状语从
句。当主句是一般将来时、祈使句或谓语中含有情态
动词时, 从句要用___________(一般现在时/现在进行
时)代替一般将来时。
一般现在时
(2)unless 可以与if. . . not 互换
*I won’t go to the party unless I’m invited.
= I won’t go to the party if I’m not invited.
除非我被邀请, 否则我不会去参加聚会。
Step 4考点·练
( )①A tourist will easily lose his way in Beijing
________he has a map or a guide. ?
A. if B. because
C. unless D. when
C
②(2018·兰州中考改编)In summer, food will go bad
quickly unless we put it into a fridge. (改为同义句)
In summer, food will go bad quickly __ we _____ put it
into a fridge.
if
don’t
要点2 worth adj. 值得的 ?
Step 1难点·探
(1)与worth搭配的常见短语有哪些?
(2)worth可以作什么句子成分?
Step 2语境·悟
*Well, it’s worth a try, even if I don’t find a planet. 好吧, 即使我没有发现一颗行星, 试一试还是值得的。(P70)
*The painting must be worth a King’s ransom.
这幅画一定价值连城。
*I think the book is worth reading.
我认为这本书值得一读。
Step 3知识·得
worth 意为“值得的”, 为形容词, 只能在句中作表语, 而不能作定语。常见用法如下:
【拓展】worth前面一般用well修饰, 不用very。
Step 4考点·练
①这个计划很值得一试。
The scheme is well ______ __ ___.
②This piece of music is worth ________ (listen) to once
more.
worth
a
try
listening
③这辆自行车值500元。
The bike __ ______ ______.
is
worth
￥500
要点3 even if 即使, 纵然 ?
Step 1难点·探
(1)even if 后跟的是假设的内容, 还是事实?
(2)even if与even though的异同是什么?
Step 2语境·悟
* Well, it’s worth a try, even if I don’t find a planet. 好吧, 即使我没有发现一颗行星, 试一试还是值得的。(P70)
*You must do it even though you do not like it.
即使你不喜欢, 你也必须做。
Step 3知识·得 even if 的用法
(1) even是副词, 可以后接动词、形容词、名词。
*He can’t even walk, let alone run.
他连路都不会走, 更不要说跑步了。
even if是连词, 意为“即使, 纵然”。后接句子引导让步状语从句(=even though); even if引导的让步状语从句, 从句该用一般将来时的时候, 用一般现在时来代替。
(2)even if与even though的区别: even if一般引导的是把握不大或假设的事情, even though引出的是事实。
Step 4考点·练
( )①(2018·潍坊中考)You will still miss the flight
________you catch a Didi car. ?
A even if B. as if C. until D. before
A
( )②—This coat was last year’s style.
—I think it still looks perfect it has gone out this year.
A. so that B. as if
C. even though D. ever since
C
③即使你不成功, 他们也会支持你。
They’ll stand by you ____ __ you don’t succeed.
even
if
(共20张PPT)
Unit 5 Look into Science
Lesson 28
Ⅰ. 根据汉语提示写出下列单词或短语
1. 移居; 迁徙 v. _______
2. 奇异的; 了不起的; 极好的 adj. ________
3. 令人费解的 adj. ________
migrate
fantastic
puzzling
4. biology为名词, 意为“ ____________”, ________意为
“生物学家”。
5. grand意为“庄严的, 外祖的, 外孙的”, child意为“孩
子”, __________ 意为“外孙, 外孙女, 孙子, 孙女”。
6. butter意为“黄油”, fly意为“飞”, ________意为“蝴
蝶”。
生物学; 生物
biologist
grandchild
butterfly
7. complete为形容词, 意为“完全的”, 其副词形式为
“__________”, 意为“完全地”。
8. 吸引某人的注意 __________________?
9. 鼓励某人做某事 _____________________?
completely
draw one’s attention
encourage sb. to do sth.
Ⅱ. 根据汉语提示完成下列句子
1. 这些飞回南方的蝴蝶是飞往北方的曾曾子孙。
The butterflies ____ ______ __ the south are the
great-great grandchildren of the butterflies ____ ___
___ the north.
that
return
to
that
left
for
2. 当他们春天开始向北方飞行时, 雌性蝴蝶产卵。
______ they _____ __ _____ north in spring, the
females ___ ____.
When
begin
to
travel
lay
eggs
3. 但是在墨西哥, 人们砍伐了蝴蝶赖以休息的树木, 因
为它们需要更多的土地来耕种。
But in Mexico, people ___ _____ the trees that the
butterflies need to rest on _______ they want more
land ___ _______.
cut
down
because
for
farming
4. 科学家仍然不理解蝴蝶怎样知道什么时候飞回南
方。
Scientists still don’t understand ____ the butterflies
know _____ __ ___ south.
5. 有许多奥秘还需那些对科学感兴趣的人来发现。
There are many mysteries yet __ ___ __________ ___
those interested in science.
how
when
to
fly
to
be
discovered
by
Ⅲ. Read the text and answer the questions
1. How far does this butterfly in North America travel
south in fall?
______________________
2. Where do the butterflies in Mexico lay eggs?
_____________________________
About 4 000 kilometers. ?
They lay eggs on only one plant. ?
要点1 as many as 多达 ?
Step 1难点·探
(1)as many as 修饰可数名词, 还是修饰不可数名词?
(2)与as many as的相关短语是什么?
Step 2语境·悟
*Here, as many as 230 million butterflies spend the winter. 多达两亿三千万只蝴蝶在这里过冬。(P72)
*Take as many as you please. 你要多少就拿多少。
Step 3知识·得
as many as 的用法
as many as 意为“多达, 同……一样多”, 用来修饰可数名词。
【辨析】as many as与as much as
as many as 修饰可数名词, 常用在人或物的具体数量前, 侧重于具体数目, 意思是“和……一样多”, “多达……”, 表示“数目”上的比较; as much as修饰不可数名词, 常用在“雨量、水量、时间量、重量、钱数、价格”等方面, 表示总量和单位量的大小, 表示程度。
Step 4考点·练
( )It’s a harvest season, 500 workers are working
on the farm.
A. as many as B. as little as
C. as much as D. as few as
A
要点2 leave for 动身去…… ?
Step 1难点·探
(1)leave for后跟的是目的地, 还是出发地?
(2)leave的几种用法是什么?
Step 2语境·悟
The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north. 返回南方的蝴蝶是前往北方的蝴蝶的曾曾孙子(女)。(P72)
*The boy left here without saying a word.
小男孩没说话就离开了。
*Don’t leave the baby alone at home.
不要单独把孩子留在家里。
Step 3知识·得
leave的一词多义
含义 用法
离开 ①leave A 离开A地;
②leave for A 动身去A地;
③leave A for B 离开A地去B地
遗留, 遗忘 leave sth. at/in. . . 把某物遗忘在……
使保持
某状态 ①leave+宾语+宾语补足语;
②leave. . . alone不理会, 不管……
Step 4考点·练
( )①(2018·达州中考)—Jack, remember _______
off the lights when ________your bedroom. ?
—OK, I won’t forget, Mom. .
A. turning; leaving
B. to turn; leave
C. turning; left
D. to turn; leaving
D
②Xu Lei and her teammates are ___________(将要动
身去) the U. S. A. next week. ?
leaving
for
(共23张PPT)
Unit 5 Look into Science
Lesson 29
Ⅰ. 根据汉语提示写出下列单词或短语
1. 复杂的 adj. ________
2. 双胞胎之一; 孪生儿之一 n. ____
3. 重复; 复述; 背诵 v. ______
4. 模式; 形式 n. _______
complex
twin
repeat
pattern
5. 确认; 鉴别 v. _______
6. 指示; 说明 n. __________
7. blue 意为“蓝色”, print意为“印刷品”, 其合成词
_________, 意为“蓝图”。
8. general为形容词, 意为“总的; 普遍的”; 其副词形式
为“________”
identify
instruction
blueprint
generally
9. grand为形容词, 意为“(外)孙的, (外)祖的”;
_________意为“孙子, 外孙”; _____________意为“孙
女, 外孙女”。
10. 除……之外 _________?
11. 与……相关 ___________?
12. 由……引起 ___________?
13. 数十亿计的 _________?
grandson
granddaughter
except for
be related to
be caused by
billions of
Ⅱ. 根据汉语提示完成下列句子
1. 一般而言, 蓝图就是一幅图纸, 它显示如何用不同的
部分构成一座房子。
__ _______, a blueprint is a drawing ____ ______ how
to put a house ________ ____ many different parts.
In
general
that
shows
together
with
2. 但是创造一个生物比盖一座房子要复杂得多。
But ________ a living thing is far _____ ________ than
building a house.
building
more
complex
3. 对于自然界来说, 改变生物的DNA以使他们适应他
们生存的世界要花费数百万年的时间。
It _____ _______ __ _____ for nature to change the
DNA in living things __ _____ _____ __ the world they
live in.
takes
millions
of
years
to
make
them
fit
4. 从你的DNA中, 科学家不但可以辨认出你, 而且能够
辨认出和你有(血缘)关系的人。
From your DNA, scientists can identify ___ ____ you,
___ ____ people ____ ___ related to you.
not
only
but
also
who
are
5. 当你有(外)孙子或(外)孙女时, 他或她会拥有你的
DNA。
______ ____ _____ a grandson or granddaughter, he
or she ____ _____ your DNA.
When
you
have
will
have
Ⅲ. Read the text and answer the questions
1. Can the scientists change your DNA now?
_______________
2. What influences your height?
_____
No, they can’t . ?
DNA.
要点1 except for 除……之外 ?
Step 1难点·探
(1)在什么情况下用except for?
(2)“除……之外”还有几种说法?
Step 2语境·悟
*Except for some twins, every living thing has its own unique DNA.
除了一些双胞胎外, 每个生命都有自己独特的DNA。(P74)
*He is a good person except for his temper.
除了脾气之外, 他是个很好的人。
Step 3知识·得 except for的用法
except for意为“除……之外, 要不是由于”, 它要求排除的是不同类的。常用于对整体情况进行说明后, 再对细节纠正、说明, 表示对主要部分的肯定和对局部的否定。含有惋惜, 美中不足之意。
【拓展】 “除……之外”的几种说法
except 介词, 意为“除了……之外”,
表示同类事物间的排除关
系不包括except后的宾语在
内, 含有“减去”的意思, 一般不用于句首
besides 介词, 意为“除了……之外,
还有”, 包括besides后面
的宾语在内, 含有“加上”
的意思
but 意为“除……之外”, 常与no, all, every, each, none, nobody等词连用, 有时可与except互换
*He is good at singing besides dancing.
他除跳舞之外, 还擅长唱歌。
*Nobody can speak French but me in my class.
在我班, 除了我之外, 没人会说法语。
*He can do well in all the subjects except art.
除了美术之外, 他可以学好所有的学科。
Step 4考点·练
①用except, except for, besides填空。
a. 除了几处语法错误外, 你的作文写得很好。
Your composition is good ______ ___ a few grammar
mistakes.
b. We all went to the zoo ______ Li Ming.
c. _______ Tom, five other boys also pass the exam.
except
for
except
Besides
( )②—How was your trip yesterday?
—It was great ________the hot weather. Everyone had
a good time ________Fred. He broke his camera. ?
A. except; except B. except; except for
C. except for; except D. except for; except for
C
要点2 Some health problems can be caused by problems in your DNA. 一些健康问题是由你的DNA问题引起的。(P74)
Step 1难点·探
(1)你会分析句子成分吗?
(2)这是什么语态? ?
Step 2句型·悟
这是一个简单句。Some health problems作主语, can be caused 作谓语, 这是含有情态动词的被动语态。句子结构如下所示:
Step 3考点·练
( )①(2018·阜康米泉中考) The boy thinks he
shouldn’t ________what to do because he is 18 now. ?
A. tell B. tells
C. telling D. be told
D
( )②—Tom is always careless with his
schoolwork. Could you help him?
—No problem! I think he ________to think twice
before starting. ?
A. should be told B. can tell
C. should tell D. can be telling
A
③ We should hold a meeting to talk about the party.
(改为被动语态)
A meeting ______ ___ ____ to talk about the party.
should
be
held
(共16张PPT)
Unit 5 Look into Science
Lesson 30
Ⅰ. 根据汉语提示写出下列单词或短语
1. 影响 v. _____
2. 建议, 提议, 暗示 v. _______
3. 发展 n. ___________其_____形式是develop
affect
suggest
development
动词
4. discover为动词, 意为“_____”, 其名词形式为
“_________”, 意为“发现, 发觉”。
5. 使……翻转 ___________
discovery
turn. . . over
发现
Ⅱ. 根据汉语提示完成下列句子
1. 我建议你也试一下!
_ _______ you try it, too!
I
suggest
2. 托着纸板的向上的空气压力要大于广口瓶内水的向
下的压力。
The air pressure pushing up on the cardboard __
______ than ____ __ the water pushing down from
inside the jar.
is
higher
that
of
3. 广口瓶外面的空气压力大, 把纸板托在原位置。
The ______ air pressure outside the jar _____ the
cardboard __ _____.
4. 我总想知道没有电脑或手机, 生活是什么样的。
I always wonder _____ ___ would be like _______
computers __ mobile phones.
higher
holds
in
place
what
life
without
or
5. 看见事情的发生会很有趣。
It will be interesting __ ___ _____ ________.
to
see
what
happens
Ⅲ. Read the text and answer the questions
1. Which is higher the air pressure pushing up or down
in the experiment?
_________________________________?
2. What affects our daily life?
_______
The air pressure pushing up is higher.
Science.
要点 development n. 发展 ?
Step 1难点·探
development的词根是什么?
Step 2语境·悟
*Our lives would surely be very different without scientific developments. 没有科学的发展, 我们的生活一定是很不一样的。(P76)
*This is an important stage in our country’s development. 这是我们国家发展的重要阶段。
Step 3知识·得
与development同词根的词的用法
(1)development为名词, 意为“发展, 开发”, 为不可数名词; 意为“事态发展; 新情况; 进步”时为可数名词。develop为动词, 意为“发展”。
(2)固定搭配: developed country发达国家; developing country发展中国家。
*Doing chores helps to develop children’s independence and teaches them how to look after themselves.
做家务有助于发展孩子们的独立性, 教他们怎样照顾自己。
*America is a developed country while China is a developing country.
美国是一个发达国家, 而中国是一个发展中国家。
Step 4考点·练
( )①(2018·菏泽中考)Now more and more schools
care for the full ________of the students’ talents. ?
A. development B. agreement
C. preparation
A
( )② Plants ________from seeds, but many
animals ________from eggs. ?
A. develop; developed
B. developed; develop
C. developed; developed
D. develop; develop
D
③It is interesting to research his ___________
(develop)as a scientist.
development
(共37张PPT)
Unit 5 Look into Science
Unit Review
定语从句
【新知导引·悟】
从括号中选择恰当的词补全下列教材中的句子, 并体会
定语从句的用法。
①The butterflies ____ (that/what) return to the south
are the great-great grandchildren of the butterflies
____ (what/that)left for the north.
that
that
②From your DNA, scientists can identify not only you,
but also people ____ (who/which)are related to you.
③In Mexico, the butterflies always return to the same
small piece of forest, ______(which/that)is only 20
kilometres wide.
who
which
④But in Mexico, people cut down the trees ____
(that/who)the butterflies need to rest on because they
want more land for farming.
⑤Your DNA has billions of instructions ____
(that/what)explain why you are the way you are.
that
that
【知识详解·记】
1. 定语从句概述
(1)定义: 在复合句中用来限定或修饰名词、代词的从句叫定语从句。
(2)先行词: 被定语从句所限定或修饰的名词、代词叫先行词。
(3)引导词: 引导定语从句的关系词叫引导词。常见的引导词有: that指人或物, 在句中作主语或宾语; who指人, 在句中作主语; whom指人, 在句中作宾语; which指物, 在句中作主语或宾语; whose指所属关系, 在句中作定语。
(4)位置: 定语从句必须放在先行词之后, 作后置定语。
2. 定语从句的关系代词只用that的四种情况
(1)当先行词被序数词、形容词最高级或the only, the same, the last, the very等修饰时。例如:
It’s the most interesting place that I have ever visited.
这是我曾经去过的最有趣的地方。
(2)当先行词是不定代词或先行词被all, any, much, many, every, no, few, little等修饰时。例如:
You can do everything that you like to do.
你可以做你喜欢做的一切。
(3)当先行词里同时含有人和物时。例如:
The man and the car that I saw yesterday are in the schoolyard today.
我昨天看到的男子和车今天在校园里。
(4)当先行词前有who或which等疑问代词时。例如:
Who is the girl that spoke to you just now?
刚才和你说话的女孩是谁?
3. 定语从句的主谓一致
定语从句的谓语动词和定语从句的主语保持人称和数的一致, 当关系代词在定语从句中作主语时, 其谓语动词与先行词保持人称和数的一致。例如:
This is one of the trees that were planted last year.
这是去年种的树中的一棵。
【语法强化·练】
单项选择
( )1. (2018·辽阳中考)The four tools ________
people use for Chinese handwriting are called “Four
Treasures of Study”. ?
A. that B. who C. what D. whom
A
( )2. He is the only student ________is studying in
the classroom. ?
A. who B what C. that D when
( )3. I can give you something ________you
need. ?
A. whom B. who C. whose D. that
C
D
( )4. My grandparents like to live in a house is
not very big but bright and comfortable.
A. that B. who
C. what D. whose
A
【理·单元话题】
【记·写作佳句】
【教材句】
1. What kinds of experiments have you done in science class?
在科学课上, 你做过什么实验?
2. We have discovered that the air pressure helps the cardboard hold the water in the jar.
我们已经发现空气的压力有助于纸板托住广口瓶里的水。
3. Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar.
因为大约五分之一的空气是由氧气组成, 所以水就上升到瓶子的大约五分之一处。
4. Scientists use huge telescopes when they look for planets.
科学家在寻找行星时, 他们用巨型望远镜。
5. There are many mysteries yet to be discovered by those interested in science.
有些奥秘需要那些对科学感兴趣的人来发现。
6. Some health problems can be caused by problems in your DNA.
一些健康问题可能是由你的DNA问题引起的。
7. Science is interesting, and it affects our everyday lives.
科学是有趣的, 并且它影响我们的日常生活。
【拓展句】
1. We did the experiment that the teacher told us in class. 我们做了老师在课堂上告诉我们的实验。
2. We find science is very interesting and useful. We should learn more about it.
我们发现科学是有趣且有用的。我们应该学习更多的科学知识。
3. With the development of science, our life has improved a lot.
随着科学的发展, 我们的生活已经有了很大的提高。
【鉴·典题考题】
“知识改变命运, 科技改变生活”, 随着科学技术的发展, 人们生活的各个方面都发生了很大的变化。 请以The great changes in our life为题写篇短文, 内容包括:
1. 网络购物(淘宝, 京东, 天猫等), 微信也可以购物
2. 手机也变得越来越重要了, 一部手机可以搞定生活中绝大部分事情
3. 学生的课外学习资料也与网络连在一起了等。词数在80左右。
【审题谋篇】
体裁 说明文
时态 一般现在时
人称 第一人称
要点 ①开篇点题指出科学对生活的影响
②具体描述生活在哪些方面发生了变化
③最终表达自己的观点
【遣词造句】
1. 开篇点题指出科学对生活的影响
(1)科学 ______
(2)影响 _____
(3)需要 _____
(4)方便的 __________
science
affect
need
convenient
(5)令某人吃惊的 _______________?
(6)做实验 __________________?
(7)我们的生活发生了很大的变化。
_______________________?
to one’s surprise
do some experiments
Our life has changed a lot.
2. 具体描述生活在哪些方面发生了变化
(1)提高 ________
(2)变化 _______
(3)手机 ______
(4)电影 ____
(5)与……不同 _______________?
improve
change
phone
film
be different from
(6)越来越方便 _______________________?
(7)购物 ___________
(8)我们可以用手机做大部分事情。
We can do _____ __ ___ ______ ____ our phones.
more and more convenient
go shopping?
most
of
the
things
with
3. 最终表达自己的观点
(1)重要的 _________
(2)学习 _____
(3)相信 ______
(4)越来越好 _______________?
(5)自豪 ___________
important
learn
believe
better and better
be proud of?
(6)我们应该合理地运用这些科技产品。
We should ___ the technology products __ __ _____
____.
use
in
a
good
way
【连句成篇】
The great changes in our life
With the development of science and technology, our life is very different from the life in the past. Our life is becoming more and more convenient. We can go shopping online at home with our phone. If you don’t like this, you can also buy something on WeChat. You can see some videos on WeChat about it.
If you don’t want to cook, you can buy some food by your mobile phone. Someone will send it to you in a very short time. Even some students also connect their exercises to it. The teacher can know the result in a minute by it.
The mobile phone is more and more important in our life, but everyone must use it in a good way.
【练·话题写作】
大型纪录片《厉害了! 我的国》Amazing China! 展现了我国近几年来各个领域的巨大变化和取得的伟大成就。请你以Amazing China! 为题, 从中学生的角度介绍你身边的变化。
写作要求:
1. 表达清楚, 语法正确, 上下文连贯。
2. 词数: 80左右(开头已给出, 不计入总词数)。
3. 文中不得出现真实的姓名, 校名和地名。
参考词汇: free breakfast, shared-bikes(共享单车), high-speed train(高铁), subway(地铁), WeChat Pay(微信支付), community service(社区服务), life quality
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