主句是一般将来时/ 祈使句 / 含情态动词，从句用一般现在时表将来。I will tell you when he comes.他一来我就告诉你。While you are reading, please keep quiet.你读书时请保持安静。二、条件状语从句
1.常用引导词
if：如果
unless：除非 = if…not（必考）
2.核心考点：主将从现（和时间从句完全一样）
If it rains tomorrow, we won’t go camping.如果明天下雨，我们就不去露营。You will fail unless you study hard.= You will fail if you don’t study hard.除非你努力学习，否则你会不及格。三、时间&条件状语从句 对比总结
项目
时间状语从句
条件状语从句
主句
将来时/ 祈使句 / 情态动词
将来时/ 祈使句 / 情态动词
从句
一般现在时
一般现在时
关键词
when, while, after, before, as soon as, until
if, unless
规则
主将从现
主将从现
四、中考易错点
1. when & while区别
when + 短暂 / 延续动词都可
while + 只能延续动词（常进行时）
2. unless = if…not同义句转换必考
3.出现since，主句常用现在完成时
I have lived here since I was five.五、一轮复习小练习（单选）1. I will go for a picnic if it ______ fine tomorrow.A. isB. will be C. was2. He didn’t go to bed ______ his mother came back.A. if B. until C. while3. ______ you study hard, you won’t pass the exam.A. If B. Unless C. When中考英语语法一轮复习时间&条件状语从句 专项练习卷（考点分层版）
考点一：时间状语从句基本引导词（when/while/as/after/before/until）
一、单项选择（基础题）
1. I was reading a book ______ my mother came in.A. when B. while C. after2. ______ I was walking home, it began to rain.A. When B. While C. Before3. He learned Chinese ______ he came to China.A. before B. after C. if4. Please wait here ______ the rain stops.A. until B. if C. unless
考点二：时间状语从句高频引导词（as soon as /since）
二、单项选择（中档题）
1. I will call you ______ I arrive in Beijing.A. as soon asB. until C. while2. We have known each other ______ we were children.A. when B. sinceC. after
考点三：条件状语从句基本引导词（if /unless）
三、单项选择（基础必考题）
1. We will go to the park ______ it is sunny tomorrow.A. if B. until C. unless2. You will be late for school ______ you hurry up.A. if B. unlessC. when3. He won’t pass the exam ______ he works hard.A. if B. unless C. until
考点四：核心必考点——主将从现
四、用所给动词的适当形式填空（高频考点）
1. If it ______ (rain) tomorrow, we ______ (stay) at home.2. I ______ (tell) him the news as soon as he ______ (come) back.3. When you ______ (get) there, please ______ (call) me.4. Don’t ______ (go) out until the rain ______ (stop).
考点五：易混辨析（when /while/unless = if…not）
五、句型转换（中考必考）
1. He didn’t go to bed until his father came back.（同义句）He ______ go to bed ______ his father came back.2. If you don’t study hard, you won’t succeed.（同义句）______ you study hard, you won’t succeed.3. When I came in, he was drawing.（用 while 改写）______ I was coming in, he was drawing.
考点六：综合语境运用（中考真题难度）
六、单项选择（综合提升）
1. —When will you go to the park?—______ I finish my homework.A. Because B. As soon as C. Though2. ______ you are free, come to see me.A. IfB. Until C. Before3. I won’t believe you ______ I see it with my own eyes.A. if B. unless C. when时间&条件状语从句专项练习卷答案+ 详细解析（一轮复习专用）
