【精选专题课件】中考英语专题四十一 条件状语从句的知识点、考点与高频考题专题精讲（超全精编版）

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【精选专题课件】中考英语专题四十一
条件状语从句的知识点、考点与经典高频考题专题精讲（超全精编版）


本节课程在本学科中的地位
课程介绍
教学目标
条件状语从句，即在某种条件下，一件事情可能发生。在英语中由连接词if或unless等引导的状语从句叫作条件状语从句。条件是指某一件事情实现之后（状语从句中），一件事情（主句）才能发生，通常译作＂假如，只要，如果＂等意思。条件状语从句中，主从句的时态要遵循＂主将从现＂的原则。即，主句是将来时态时，从句用一般现在时代替将来时态。
考点详解
引导条件状语从句的连词或词组有：if(如果)，unless(除非)，as long as(只要)等。如果主句是将来时，条件状语从句也用一般现在时来表示。如：
考点详解
知识讲解脉络
if引导的条件状语从句
if引导的条件状语从句
unless引导的条件状语从句
unless引导的条件状语从句
as/so long as引导的条件状语从句
as/so long as引导的条件状语从句
once引导的条件状语从句
once引导的条件状语从句
连词是if引导的条件状语从句
连词是if引导的条件状语从句
if条件句的时态搭配
（1）if从句用一般现在时，主句用一般将来时。
If he runs he’ll get there in time. 如果他用跑的，他就会及时赶到那儿。
The cat will scratch you if you pull her tail. 如果你拉猫的尾巴，它就会抓你。
（2）if从句用一般现在时，主句用may/might/can。
If the fog gets thicker the plane may/might be diverted.
如果雾再大一些，飞机可能就会改在别的机场降落。
If it stops snowing we can go out. 如果雪停了，我们就可以出去。
（3）if从句用一般现在时，主句用must/should。
If you want to lose weight you must/should eat less bread.
如果你想减肥，你必须少吃面包。
if条件句的时态搭配
if从句用一般现在时，主句用一般
现在时。
if从句用现在完成时，主句用一般将来时。
if从句用现在进行时，主句用一般将来时。
If you heat ice it turns to water. (也可用will turn)
如果把冰加热，它就会化成水。
If you are looking for Peter you’ll find him upstairs.
如果你是在找彼得，上楼就会找到他。
If you have finished dinner I’ll ask the waiter for the bill.
如果你吃完了，我就叫服务生来算账。
if条件句的时态搭配
知识拓展
1.在以when，before，as soon as等引导的时间状语从句，也适用＂主将从现＂原则，即如果主句是一般将来时，从句则用一般现在时。
I’ll tell her the good news when she comes back.
当她回来的时候，我将把这个好消息告诉她。
she will give you a call as soon as she returns.
她一回来就会给你电话。
知识拓展
Work hard, and you will make great progress.
= If you work hard, you will make great progress.
如果你努力学习，你就会取得大的进步。
Hurry up, or you will be late.
=If you don’t hurry up, you will be late.
如果你不快点，你就要迟到了。
2.If条件句的同义句：祈使句，and /or+将来时态的陈述句。
知识拓展
巧学妙记
＂ if ＂ 引导的条件状语从句的记忆口诀
if 条件句不一般，几个要点记心间；
条件句,放在前，逗号要放句中间。
条件句表真实，主将从现要遵从；
条件句非真实，虚拟语气用到位。
巧学妙记
跟踪训练
feel
will have
will
see
has
are
lives
will dress
will be
doesn’t work
will keep
用所给词的适当形式填空
will buy
is
will fight
argue
will sell
need
says
will send
tours
will feel
用所给词的适当形式填空
will go
doesn’t rain
Will
have
is
will write
will major
gets
gets
won’t catch
passes
用所给词的适当形式填空
1. 如果他到的晚了会发生什么事情？
What _______________ _______________if he _______________late?
2. 如果努力学习，你就会取得好成绩。
If you _______________ _______________, you _______________ _______________ _______________ _______________.
3. 他如果看电视太久了，他的父母会不高兴。
If he _______________ TV too much, his parents _______________ _______________ unhappy.
4. 如果我们为他组织生日聚会，大家都会来的。
Everyone _______________come if we _______________a birthday party _______________him.
5. 如果明天不下雨，我会和你一起去公园的。
If it _______________ _______________tomorrow, I _______________go to the park _______________you.
will
is
happen
study
hard
be
will
grades
good
get
will
watches
will
rain
doesn't
for
organize
will
rain
完成句子
完成句子
6. 如果她起晚了，就会旅游迟到。
She ______________ ______________ ______________ ______________ the trip if she ______________ ______________ late
7. 如果他有空，他会帮助你的。
If he _______________ _______________, he _______________ _______________you.
8. 如果Tom成为足球运动员，他就不会上大学了。
Tom _______________ _______________go to the college if he _______________a soccer player..
9. 你如果不完成作业就不能学好各门功课。
You _______________ _______________good at all the subjects if you _______________finish the homework.
10. 如果你上课睡觉，老师会生气。
If you _______________in class, your teacher _______________ _______________ _______________.
will
late
be
gets
up
won't
become
will
help
will
is
never
be
be
will
sleep
don't
angry
for
free
跟踪训练
真题再现
1. —I really want to pass the exam for further study.
—Believe in yourself, dear! Your dream will came true ___________ you put your heart.
B
【解析】句意：——我真的想通过考试，继续深造。——相信你自己，亲爱的！只要你用心去做，你的梦想就会成真。考查连词辨析题。A. even if即使，表让步；B. as long as只要，表条件；C. as soon as一…就…。本句是条件状语从句，需用as long as连接。根据句意语境，可知选B。
真题再现
2. —The weather report says that it ___________ tomorrow in most parts of Anshun city.
—If it ___________, the school sports meet will be canceled．
B
解析
【解析】句意：——天气预报说明安顺大部分地区会下雨。——如果下雨，学校体育运动会将会取消。第一个句子为宾语从句，根据tomorrow判断，从句的时态为一般将来时，首先排除C,D；第二个句子中，if引导的是条件状语从句，遵循“主将从现”的原则，因为主句是一般将来时，因此if引导的从句用一般现在时，故答案为B。
真题再现
3. If you are caught smoking in the kitchen, you ___________ by your boss.
C
真题再现
4. —Can students go online during lessons?
—They can ___________ it is for that lesson.
A
真题再现
5. —Thank you for telling me so much knowledge about nature.
—Don’t mention it. ___________ you have more questions, come to me any time.
A
解析：句意：——谢谢你告诉我这么多关于自然的知识。——别提了。如果你有更多的问题，随时找我。考查连词辨析题。本句是条件状语从句，需用if连接，而because表原因，though表让步，都可排除。根据句意结构和语境，可知选A。
真题再现
6. —I really want to pass the exam for further study.
—Believe in yourself, dear! Your dream will came true you put your heart into it.
B
A.even if
B.as long as
C. as soon as
[解析]句意：——我真的想通过考试，继续深造。——相信你自己，亲爱的！只要你用心去做，你的梦想就会成真。考查连词辨析题。A. even if即使，表让步；B. as long as只要，表条件；C. as soon as一…就…。本句是条件状语从句，需用as long as连接。根据句意语境，可知选B。

真题再现
7. I won’t talk about that with Kate ___________ she wants.

B
C
after
A
because ?
B
B．unless
解析:
真题再现
8. Our head teacher often says, ＂You will not pass the exam ___________ you work hard.＂
B
A.
if
B.
unless
D.
when
C.
since
【解析】句意：我们的班主任常说：＂如果你们不努力学习，你们就通不过考试＂。If如果，引导条件状语从句；unless除非，引导条件状语从句；since自从，因为，引导时间状语从句；when当……时候，引导时间状语从句；条件状语从句用一般现在时表示一般将来时，主句用一般将来时，根据题中的时态和句意，如果不努力，就通不过考试，故此处用unless。故选B。
真题再现
9. —I wonder if our foreign teacher Mr. White ___________ to his hometown next Tuesday.
—I’m not sure. But if he returns to his hometown, I’ll ___________ him off.

B
A.
return；see
B.
will return；see
C.
will return
解析：句意：——不知我们的外籍教师怀特先生下星期二是否回家。——我不确定。但是如果他回家乡，我会送他。连词if有两种用法，一是引导宾语从句，意思是“是否”，当主句是一般现在时态时，从句可为需要的任意时态；二是引导条件状语从句，意思是“如果”，时态遵循“主将从现”。故选：B。
真题再现
10. You will never achieve success ___________ ou devote yourself to your work.

D
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解析
句意：除非你把自己专心于你的工作，否则你将永远不会成功。句意：after在……之后；if如果，because因为，unless除非，如果不；if或unless引导的条件状语从句用一般现在时表示一般将来时，主句用一般将来时。结合句意，你如果不专心工作，你就不会获得成功，故此处为unless。故选D。
真题再现
11. Johnson won’t answer the phone if he ___________ the number.

B
A.
know
B.
doesn’t know
D.
didn’t know
C.
will know
解析:
真题再现
12. You will be able to see something ______you climb onto those rocks.
A
A. if
B. though
C.until
D.unless
句意：如果你爬上这些岩石，你就会看到一些东西。A如果，引导条件状语从句；B即使，引导让步状语从句；C直到……；D如果……不。故选A。
真题再现
模拟检测
1. You won’t get to the subway station before 9 :00 am _
________ you leave earlier.
A
D
when
解析：句意：除非你早点离开，否则你在九点之前不会到达地铁站。A. unless除非……；B. until直到……；C. because因为……；D. when什么时间。根据题意，除非你早点离开，所以连接词用unless。故正确答案为A。
模拟检测
2. If New Mart _______________ 24 hours a day during the winter holiday,
I will feel _______________.
A
模拟检测
3. I won’t be able to understand what you say, you speak too quickly.

A
A.if
B.though
C.because
D. but
模拟检测
4. Lucy and I have been friends for years. _______ my memory is correct, we first met in a meeting.
A
D
When
【解析】句意：Lucy和我是多年的好朋友，如果我的记忆没错，我们第一次见面是在一次会议上。if如果，引导条件状语从句；because因为，引导原因状语从句；though尽管，引导让步状语从句；when当……时候，引导时间状语从句。根据句意可知，这里表示条件，故应选A。
模拟检测
5. I think you should complain _______________ you are happy with the situation.

A
解析：句意：我认为你应该抱怨，除非你对这种情况感到满意。A.unless除非，如果不；B.however然而；可是；无论如何；C.after在......以后；D.though即使；虽然，尽管，不过，可是。结合句意和语境可知选A。
模拟检测
6. I will have to close my clothes shop _______________ my business improves.
B
A.if
B.unless
C.after
D. when
【解析】解析：句意：除非我的生意有起色，否则我要关闭我的服装店。A.如果；B.除非；C.在……之后；D.当……时候。故选B。
模拟检测
7. Chuck will go swimming with us tomorrow afternoon _______________ he can finish his homework by then.
C
D
or
模拟检测
8. _______________ you have a picnic this weekend, remember to call me.
B
A. As
B.For
C. If
D. Because
解析：句意：除非我的生意有起色，否则我要关闭我的服装店。A.如果；B.除非；C.在……之后；D.当……时候。故选B。
模拟检测
9. I usually sleep with the window open ______________ it’s very cold.
D
A.
until
B.
as
D.
unless
C.
if
模拟检测
10. —Could you give me some advice on travelling?
—Take a map with you _______________ you have a guide or you know the city well.
B
A.if
B.unless
C.although
D.because
模拟检测
11. It is seven o’clock. You will be late for school _________ you get up right now.

A
D
though
模拟检测
12. —Excuse me, could you please tell me if the meeting _______________ on time?
—If it _______________ tomorrow, we’ll have to put it off.

B
A.
will hold；snows
B.
will be held；snows
D.
holds；will snow
C.
will be held；snow
模拟检测
总结
条件状语从句要注意：
（1） 主从句的时态要遵循＂主将从现＂的原则
（2）if(如果)，unless(除非)，as long as(只要)引导的，如果主句是将来时，条件状语从句也用一般现在时来表示。
课堂小结
谢谢
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