资料简介
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 foruse
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
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