第三讲 时间状语从句
引言
状语从句是高考中常考语法知识点之一，时间状语从句是重中之重，其中的连词辨别是难点，也是阅读中经常容易混淆的知识点。掌握连词的各种用法是很有必要的。
本节课课程目标
1.掌握时间状语从句的基本连词的用法
2.掌握连词的特殊用法
3.学会根据上下文逻辑关系选择连词
【when/while/as】
一．请用when while as 填空
0是什么数1.Why do you want a new job when you’ve got such a good one already？
工商银行个人网上银行转账
When 表示原因翻译成既然
2.When the students heard the teacher’s footsteps, they all stopped talking.
从句动作发生在主句之前用when
3.We were about to start when it began to rain.
4.The game had hardly/scarcely/barely begun when it started raining.
When 的特殊句型
be about to do ... when ... 正要去做某事，突然……
be doing ... when ... 正在做某事，突然……
be on the point of doing ... when ... 正在做某事，突然……
5.He likes pop music，while I am fond of folk music.
作为并列连词，意为“而，却”，表示对比
6.when/while/as I was walking down the street关于团结的成语，I came across an old friend of mine
为从句是延续性动词并且同时进行的时候可以互换
7.While I accept that he is not perfect, I do actually like the person.
While放句首，表示让步，翻译“尽管”
8.It will warm up a little bit on Sunday as the cold front passes.
as表示随着随着
9.The students sang as they walked.
as表示一边 一边
10.When the manager comes here for a visit next week，I’ll talk with him about this．
怎样开网店啊二．高考小练
1.Over time,__________the population grew, people began cutting food into small pieces so it would cook more quickly.[语法填空]2016全国III
【参考答案】as/when
【答案解析】考查时间状语从句。句意：随着人口的增长，人们开始把食物切成小块，这样可以煮得快一点，这里是时间状语从句，when意为＂当……的时候＂，后跟长动作或短动作，故填as／when。
2.The mother held the baby in her front paws much the way a human does.__________it cried, she rocked it back and forth and gave it little comforting pats.[语法填空]2016四川
【参考答案】When/If
【答案解析】考查时间状语从句。句意：如果或当它哭的时候，她会前后摇动。故填When/If。
三．课堂巩固
1.I had just stepped out of the bathroom and was busily drying myself with a towel ____ I heard the steps.
A. while B. when C. since D. after
2.He was about halfway through his meal ____ a familiar voice came to his ears.
A. why B. where C. when D. while
3.We were swimming in the lake ____ suddenly the storm started.
A. when B. while C. until D. before
4.— I’m going to the post office.
— ____ you’re there, can you get me some stamps?
A. As B. While C. Because D. If
5.I ____ along the street looking for a place to park when the accident ____.
山东高考报名网址A. went; was occurring B. went; occurred
C. was going; occurred D. was going; had occurred
答案BCABC
【before/after/since】
一．请用before/after/since填空
1.As it reported, it is 100 years since Qinghua University was founded.
It＋ is/was＋时间段＋since＋从句，表示“自从……以来已经有多长时间了”
2.John thinks it won’t be long before he is ready for his new job.
it won’t be＋一段时间＋before（vt-ed）…＂没过多久就...＂
3.The field research will take Joan and Paul about five months; it will be a long time before we meet them again.
农村医疗保险it will（not）be＋一段时间＋before（一般式）… ＂还要过多久才……＂
4.Before she could move, she heard a loud noise, which grew to a terrible roar.
＂尚未来得及 ＂
5.You should be a pupil before you become a teacher.
before ＂要……先……＂
6.You should do it before it is too late.
before＂趁……＂
7.She had been talking to her mother about the lives of homeless people since they first saw the homeless man.
句意：自从他们第一次看到无家可归的人，Hannah就一直在跟她的妈妈说流浪者的生活，根据句意since
8.Scientists say it may be five or six years before it is possible to test this medicine on human patients.
该句型也是It was not long before的创新句型。句意：科学家说也许再有5年时间这种药就可以在人类身上做实验了。
课堂巩固
It +be+时间+before/since/when/that…是高考中常考的重要考点
A. before B. when C. since D. that
1. It was two years ________he realized the truth.
2. It will be two years ________ the economic situation improves.
3. It was two years later ________ he realized the truth.
4. It is /has been two years ________ he lived here.
5. It was midnight ________ he arrived home.
6. It was at midnight ________ he arrived home.
7. It was not until midnight _______ he arrived home.
DDBCABD
【一....就】
As soon as
Once
Directly
Immediately
Instantly
The instant(that)
The moment (that)
一．单选
1._____ they decide which college to go to, students should research the admission procedures.
A. As B. While C. Until D. Once
2.You will be successful in the interview _______ you have confidence.
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