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初中英语「时间状语从句」超全总结
（考试必考点，简单好记）
一、什么是时间状语从句？
用一个句子作时间状语，说明动作发生的时间。
结构：主句 + 连词 + 从句（从句也是完整句子）
必考引导词（连词）
1. when 当……时候，（可接短暂/延续动作）
例：When I got home, it was raining.(瞬间动作+持续动作）
When I opened the door, I saw my friend.（瞬间动作+瞬间动作）
2. while 当……时候（强调同时进行）只能接延续动作/进行时
例：While my mother was cooking, I was doing my homework.（持续动作+持续动作）
While we were talking,the teacher came in.（瞬间动作+持续动作）
总结：
短：瞬间性动词（进来、看到） When:短+短，短（主）+长（从句）
长：延续性动词（可持续发生的动作） While:长+长，短（主）+长（从句）
before 在……之前，主句动作发生在从句之前
Close the window before you leave the room.
after 在……之后,主句动作发生在从句之后
I went to bed after I finished my homework.
until 直到……为止
主句是肯定句，表示主句的动作持续到从句表示的时间点结束
We will stay at home until it stops raining.(延续性+until+短暂性）
若主句是否定（not... until...,直到...才.....）
He didn’t leave the market until 6:00.(not+短暂性+until+短暂性动词或时间点）
as soon as 一……就……，强调从句动作发生之后主句动作很快就发生了
(主从一致或主将从现）
It began to rain as soon as I got home.
I will leave as soon as it stops raining.
时间状语从句专项训练
一．用下列所给单词完成句子。
When while until before after as soon as
I will go to bed I finish my homework.
We will go to the park it stops raining.
He didn’t leave the classroom 5:30.
Some students were reading others were writing.
My mother was cooking the bell rang.
Put away your toys you leave the room.
选出正确答案。
( ) 1.You should brush your teeth you go to bed.
A.when B.while C.after D.before
( ) 2.We will stay at home the wind stops.
A.after B.before C.until D.when
( ) 3.We will play together we meet them.
when B.while C.before D.after
( ) 4.The train began to leave we arrived at the station.
while B.as soon as C.before D.until
( ) 5.I will do my homework my young sister sleeps.
before B.while C.after D.when
( ) 6.The bell rang I was doing my homework.
when B.while C.before D.A and B
( ) 7. I was reading a newspaper ______ he came in.
A. as soon as B. when C. since D. while
( ) 8. We were talking ______ our English teacher came in.
A. So B. if C. when D. because
( ) 9. ______ I got home, my sister was doing her homework.
A. While B. Because C. When D. If
( ) 10. I will call you ______ I arrive in Beijing.
A. Though B. because C. as soon as D. so that
用法：When后 可长可短 （过去进行时/一般过去式都可）
While后 只能长 （只能用过去进行时）
两个动作都是长动作 （过去进行时），用While
答案：
一、1.after 2.as soon as 3.until 4.while 5.when 6.before
二、1--5 DCACC 6-10DBCCC

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