初二条件状语从句讲解练习

条件状语从句之迟辟智美创作
状语：状语是句子的重要修饰成份.状语是谓语里的另一个附加成份,它附加在谓语中心语的前面,从情况,时间,地方,方式,条件,对象,肯定,否定,范围和水平等方面对谓语中心进行修饰或限制.用来说明地址、时间、原因、目的、结果、条件、方向、水平、方式和陪伴状况等.
状语一般由副词、介词短语、分词和分词短语、不定式或相当于副词的词或短语来担负.其位置一般放在句末，但也可放在句首或句中.
副词是一种用来修饰动词,形容词,副词或全句的词,说明时间,地址,水平,方式等概念.
1.副词一般在句子中做状语．
He speaks English very well. 他英语说得非常好.中的very是水平副词，用来修饰well.very well是修饰speak的水平状语.
He is playing under the tree.他在树下玩儿.中的under the tree 是地址状语.
2. 不定式在句子中可以作目的状语.
I come specially to see you.我专门来看你.
Ten years ago, She began to live in Dalian.
The boy was praised for his bravery.
When she was 12 years old, she began to live in Dalian.
If I am not busy tomorrow, I will play football with you.
Having had a quarrel with his wife, he left home in a bad temper.
Inhibited in one direction, it now seems that the Mississippi is about to take another.
在复合句中，由从句暗示的状语叫做条件状语从句.它可以用来修饰主语中的动词.形容词.副词等.根据它表达的意思，状语从句可以分为时间状语从句，原因状语从句，条件状语从句，比力状语从句，目的状语从句，结果状语从句和让步状语从句等.
界说
由连接词if或unless引导的状语从句叫做条件状语从句.（注意：在含有条件状语从句的复合句中，如果主句是一般将来时态，从句要用一般现在是[主将从先原则])在英文中，条件是指某一件事情实现之后（状语从句中的举措），其它事情（主句中的举措）才华发生，通常译作“假如，如果，除非”.
引导词：
①经常使用引导词：if , unless
②特殊引导词: as long as（除非；只要），supposing（假设），on
condition that（条件是），in case（如果）
条件状语从句的位置
可放在句首或句尾，放在句首时经常使用逗号与主句隔开.
If 引导词用法
if 引导的条件句有：真实条件句和非真实条件句两种:
1.真实条件句：暗示在某种条件下某事很可能发生.
如:
If you ask him, he will help you.
如果你请他辅佐,他会帮你的.
If you fail in the exam, you will let him down.
如果你考试不及格,你会让他失望的.
If it rains tomorrow, we won’t go on a picnic.
如果明天下雨，我们就不去野餐.
注意：在含有条件状语从句的复合句中，暗示将来时态，主句是一般将来时态，从句要用一般现在时[主将从现原则]，而且，切记紧跟着if的那句话是从句.）
2. 非真实条件句是虚拟语气的一种，暗示与事实相反，不成实现的条件或根本不成能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时或过去完成时.
如: If I were you, I would invite him to the party.
如果我是你,我会邀请他介入聚会.
I would have arrived much earlier if I had not been caught in the traffic. 如果没有堵车,我会到的早一点儿.
If I were you, I would go with him.
如果我是你,我会和他一起去的.
unless引导词用法
固定搭配：unless = if...not 除非,若不,除非在……的时候
You will fail to arrive there in time unless you start earlier.
If you don’t start earlier, you will fail to arrive t here in time.
如果你不早点出发,你就不能及时赶到那儿.
Unless it rains, the game will be played.
If it dosen't rain，the game will be played.
除非下雨,角逐将照常进行.
Let's go out for a walk unless you are too tired.
If you are not too tired, let's go out for a walk.
经典语句：If it dosen't rain tomorrow,we will go to the zoo.
条件状语从句就是用以暗示“在某种条件下,会……”
由as (so) long as, in case引导.
So long as you’re happy, it doesn’t matter what you do.
只要你高兴，你做什么都没有关系.
You may borrow my book as long as you keep it clean.
只要你坚持书的清洁，你就可以把我的书借去.
Take your umbrella in case it rains.
带着你的伞吧，以防下雨.
完成下列句子
1.如果你请求他，他会帮你的
If you ___him, he ___ ____you
2.如果她早点儿起床，就有时间在家里吃早餐
If she____ ____a little earlier, she’ll have time to eat breakfast at home.
3.如果你介入聚会，你将会过得很开心.
If you____ the party ,you_____ ____ a great time.
4.如果明天下雨，我们将不去野餐
If it ____tomorrow, we _____ _____ for a picnic.
5.如果你经常听英文歌，你将会喜欢英语
If you often _____ ____English songs,you___ ___English.
1、ask will help
2、gets up
3、join will have
4、rains won’t go
5、listen to will like。