条件状语从句

Lesson8 条件状语从句
语法模块
状语从句的定义：
状语从句在主从复合句中修饰主句的谓语动词，形容词或副词等。

状语从句都是由从属连词引导，与主句连续，位于句首时常用逗号与主句分开。

位于句末时，一般不用逗号与主句隔开。

状语从句有很多种，我们今天只讨论条件状语从句。

条件状语从句主要是用一种假设或者条件来询问或谈论十分可能发生的事情。

例如：
If you study hard, you will get a high mark.假如你好好学习，你将会获得高分数。

You will get a high mark if you study hard. 你将会获得高分数假如你好好学习的话。

You study hard“你好好学习”在例句中就是指一种条件，是条件状语从句。

You will get a high mark. “你将会获得高分数”是条件成立时的可能结果，是主句。

条件状语从句的常见从属连词：
1.if 如果
2.as long as 只要
3.unless 除非
条件状语从句的主句与从句时态判定规律：
1. 主句为一般将来时，条件状语从句用一般现在时，即：主将从现
例：You will not get a high mark, unless you study hard.你不会获得高分数，除非你好好学习。

2. 主句用情态动词，条件状语从句用一般现在时，即：主情从现
例：As long as you study hard, you can get a high mark.只要你好好学习，你就会获得高分数。

3. 主句为祈使句，条件状语从句用一般现在时，即：主祈从现
例：If you don’t like this bike, give it to me please.假如你不喜欢这辆自行车，请把它给我。

if是宾语从句的连接词还是条件状语从句的连接词如何判定：
if当“是否”讲时，引导宾语从句，意同whether，从句时态由事实决定。

作“假如，如果”讲时，引导条件状语从句，此时若主句为将来时或祈使句时，从句用一般现在时。

实战演练
一．单项选择
( ) 1. We won’t go for a picnic _________ it ________ tomorrow.
A. unless, rains
B. unless, don’t rain
C. if, rains
D. if, will rain ( ) 2. I don’t know _______ it will rain tomorrow. ______ it rains, I won’t go there.
A. if, when
B. when, whether
C. that, if
D. if, if ( ) 3. Alice wanted to know________ her grandmother liked the bag or not.
A. that
B. if
C. which
D. whether ( ) 4. You’ll do much better________ you’re more careful with your spelling.
A. as long as
B. whether
C. after
D. unless
( ) 5. --I am going to Hangzhou for a holiday this weekend.
--If you _______ there, could you buy me ________green tea?
A. will be, any
B. are, some
C. will be, some
D. are, any
( ) 6.--I hear that Anna will give up learning the piano.
--If she _________, her parents will be mad at her.
A. will
B. does
C. do
D.is
( ) 7. If you ________ to the party, you’ll have a great time.
A. will go
B. went
C. go
D. going ( ) 8. --what are you going to do tomorrow?
--we’ll go to the library to morrow if it __________.
A. isn’t rain
B. rain
C. won’t rain
D. doesn’t rain ( ) 9. --Do you know when he __________ back tomorrow?
--sorry, I don’t know.when he __________ back, I’ll tell you.
A. will come, comes
B. will come, will come
C. comes, comes
D. come, will come ( ) 10. I don’t know ________ he will come tomorrow or not. _________he comes, I’ll meet him.
A. whether, whether
B. if, if
C. if, whether
D. whether, if ( ) 11. You will stay healthy _____ you do more exercise, such as running and walking.
A. if
B. how
C. before
D. where
( ) 12. Lucy is _____ young hat that she can’t dress herself.
A. such
B. very
C. so
D. quite
( ) 13. _____ hamburgers are junk food, many children like them.
A. If
B. Unless
C. Because
D. Although ( ) 14. We’ll go to the farm and help the farmers with the apple-picking if it _____ tomorrow.
A. won’t rain
B. will be rain
C. doesn’t rain
D. isn’t raining ( ) 15. We will stay at home if my aunt _____ to visit us tomorrow.
A. comes
B. come
C. will come
D. is coming 二．用所给单词的正确形式填空
1. As long as it ___________(rain) tomorrow, I will stay at home.
2. If he __________(not) hurry, he _____________ (is) late.
3. I don’t want to know i f he ___________( play) well.
4. If you don’t like the food, ____________(not eat) it.
5. He won’t buy a new car unless he ____________ (sell) his old car
6. If she ____________ (not type) the letter, he’ll type it himself.
7. If I ___________ (be) ill tomorrow, I won’t go to work.
8. He says if I go to the party, I_______ (have) a good time.
9. I’ll tell him the truth, as long as he __________ (ask) me.
10. If it _________ (rain) tomorrow, my mother __________(stay) at home.
三．句型转换
1. Will you spend your holiday in Beijing? I want to know. (合并成一句)
I wanted to know ____________________________ your holiday in Beijing.
2. Does Mr. Green live near the park? Do you know? (合并成一句)
Do you know ________ Mr. Green _________ near the park?
3. Get up early, and then you will not miss the bus. (写出同义句)
_________ _________ get up early, you ________ miss the bus.
4. Hurry up, or we will be late. (用if…not替换or)
_________ we ________ hurry, we’ll be late.
5. If I win a lot of money, I will buy my mother a big house. (对划线部分提问)
四．英汉互译
1. 他不知道明天他的姑姑会不会来看他。

2. 我是不会去你家的，除非你邀请我。

3. 如果你要度假，你会去哪？
4. You can not pass unless you are a member of the YHA.
5. As long as she comes, he will go and meet her.
五．阅读理解
根据文章大意和首字母提示补全文中所缺单词
If you p_________ your car in the wrong place, a traffic policeman will soon f_________ it. You will b________ very lucky if he l_________ you go without a ticket. However, this d_______ always happen. Traffic police are sometimes very polite. During a holiday in Sweden, I found this note on my car: 'sir, we w________ you to our city. This is a "No P_________" area. You w_______ enjoy your stay here if you p_________ attention to our street signs. This note is only a reminder.' If you receive a request like this, you c__________ fail to obey it!
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