内容正文:
条件状语从句和结果状语从句
【知识梳理1】 条件状语从句
(1) if引导的条件状语从句
If引导条件状语从句。翻译成“如果”
If I were a bird ,I would fly 如果我是一只鸟,我就会飞。
(2) unless引导的条件状语从句
unless引导的是否定条件状语从句,在意义上相当于if...not,而且语气较强,一般不用于虚拟语气。如:
You’ll be late unless you hurry. 你会迟到的,如果不赶快的话。
(3) only if引导的条件状语从句
only if在引导条件状语从句时意为“只要;如果”。如:
I’ll let you use the car only if you keep it in good condition. 只要你把车保养好,我就让你用。
(4) as/so long as引导的条件状语从句 as/so long as意为“只要;如果”。如:
As long as it doesn’t rain, we can play. 只要不下雨我们就能玩。
(5) provided (that)/providing (that)引导的条件状语从句 provided (that)/providing (that)意为“如果;只要”。
如: I will agree to go providing (that my expense are paid.) 假如为我负担费用,我就同意去。
(6) once引导的条件状语从句 ,意为“一旦”。
Once you decide, you’d better not regret. 一旦你决定了,最好别后悔。
【例题精讲】
例1.
1、The WTO cannot live up to its name _____ it does not include a country that is home to one fifth of mankind.
A.as long as B.while C.if D.even though
【参考答案】C
【思路解析】从句子意思可知,是一个条件状语从句。as long as“只要„„”引导条件状语从句经常用肯定句,所以要填i