真题回顾
1.We will have no water to drink we don’t protect the earth. A.until B.before C. though D.if
(2010,上海,37)
(如果我们不保护地球,我们将没有 水喝。)
2.Bob promise to join in the football match he has to help his parents on the farm. A.if B. as C. unless D. when (2010,安徽,35)
真题
1.Tom knew nothing about it___ his sister told him. A. since B. if C. until (湖南中考)
常考的状语从句主要是, 1. when,while,as,until,not until等引导的时间状从 2. so, that, so(…)that, such(…) that 等引导的结 果状从 3.if,unless等引导的条件状 从
2. I will not go out___I finish my homework. A.until B.while C. since D.but
3. I’ll wait___she comes out. A.whether B.after C.though D.until
if 和unless引导的 条件状语句
A fish dies if you take it out of water. 如果你把鱼拿出水,它就会死掉。
注意 : 在 if 引导的条件状语从句中, if 条件句可直接放在主句后面,若 if 条件句放句首, 从句后面要加逗号, 和主句隔开。 If I get up late, I will be late for school. =I will be late for school if I get up late. 如果我起床晚了,我就会迟到。