【精选专题课件】中考英语专题三十八 时间状语从句的知识点、考点与高频考题专题精讲（超全精编版）

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【精选专题课件】中考英语专题三十八
时间状语从句的知识点、考点与经典高频考题专题精讲（超全精编版）


本节课程在本学科中的地位
通过学习本章的知识点讲解及经典例题讲解，再通过典型考题的巩固，意在让学生掌握引导时间状语从句的连词，掌握when，while，as引导时间状语从句的区别，以及比较until和till，并做到灵活运用，以便提高综合运用能力，从容更好的备战中考。
课程介绍
教学目标
时间状语从句
when，while，as引导时间状语从句的区别
比较until和till
跟踪训练
引导时间状语从句的连词
模拟检测
真题再现
讲解知识脉络
引导时间状语从句的连词
01.引导时间状语从句的连词
01.引导时间状语从句的连词
01.引导时间状语从句的连词
As
用法：
＂正当，一边……一边，随着＂，表示两个动作同时发生或某事发生时，另一个动作发生了
例句：
As time went on, his theory proved to be correct.
随着时间的推移，他的理论被证明是正确的。
01.引导时间状语从句的连词
Till/Until
用于肯定句时，表示＂直到……为止＂，主句必须为延续性动词；not...until/till表示＂直到……才＂，主句常用短暂性动词。
We shall wait until/till he comes back.
我们将一直等到他回来。


I didn’t leave until/till she finished her homework.
直到她完成作业我才离开。
01.引导时间状语从句的连词
例句：I have heard lot of good things about you since I come back from abroad. 自从我从国外回来，我已经听许多好的事情。
Since
“自……以来”，主句用一般现在时或现在完成时，从句用一般过去时。
Before
在……以前
例句： He must finish all the work before he goes home.
回家之前他必须完成所有的工作。
After
在……之后
例句：Let’s play football after school.
放学后我们打篮球吧。
01.引导时间状语从句的连词
时间状语从句的时态问题：在时间状语从句和条件状语从句中，主句如果使用一般将来时态，从句使用一般现在时表示将来，即所谓的＂主将从现＂。
As soon as I arrive in Beijing, I will ring you up. 我一到北京就给你打电话。
You’ll fall behind the others unless you study hard. 如果你不努力学习，你将会落后于其他人。
知识拓展
when，while，as引导时间状语从句的区别
02.when，while，as引导时间状语从句的区别
when，while，as显然都可以引导时间状语从句，但用法区别非常大。
① when可以和延续性动词连用，也可以和短暂性动词连用；而while和as只能和延续性动词连用。
Why do you want a new job when you’ve got such a good one already?
你已经找到如此好的工作，为何还想再找新的？ （get为短暂性动词）
Sorry, I was out when you called me.
对不起，你打电话时我刚好外出了。 （call为短暂性动词）
Strike while the iron is hot.
趁热打铁。 （is为延续性动词，表示一种持续的状态）
The students took notes as they listened.
学生们边听课边做笔记。 （listen为延续性动词）
02.when，while，as引导时间状语从句的区别
a. 从句动作在主句动作前发生，只用 when。
When he had finished his homework, he took a short rest. （finished先发生）
当他完成作业后，他休息了一会儿。
When I got to the airport, the guests had left. （got to后发生）
当我赶到飞机场时，客人们已经离开了。
c. 当主句、从句动作同时进行，从句动作的时间概念淡化，而主要表示主句动作发生的背景或条件时，只能用 as。这时，as常表示＂随着……＂ ＂一边……，一边……＂之意。
As the time went on, the weather got worse. 随着时间的过去，天气变得更糟糕了。
The atmosphere gets thinner and thinner as the height increases.
随着高度的增加，大气越来越稀薄。
As years go by, China is getting stronger and richer.
随着时间一年一年过去，中国变得越来越富强了。
The little girls sang as they went. 小姑娘们一边走，一边唱。
The sad mother sat on the roadside, shouting as she was crying.
伤心的妈妈坐在路边，边哭边叫。
b. 从句动作和主句动作同时发生，且从句动作为延续性动词时，when，while，as都可使用。
①When / While / As we were dancing, a stranger came in. （dance为延续性动词）
当我们跳舞时，一位陌生人走了进来。
②When / While / As she was making a phonecall, I was writing a letter. （make为延续性动词）
当她在打电话时，我正在写信。
② when从句的谓语动词可以在主句谓语动作之前、之后或同时发生；while和as从句的谓语动作必须是和主句谓语动作同时发生。
02.when，while，as引导时间状语从句的区别
d. 在将来时的从句中，常用when，且从句要用一般时代替将来时。
You shall borrow the book when I have finished reading it.
在我读完这本书后，你可以借阅。
When the manager comes here for a visit next week, I’ll talk with him about this.
下周，经理来这参观时，我会和他谈谈此事。

02.when，while，as引导时间状语从句的区别
I had hardly / scarcely closed my eyes when someone knocked at the door.
＝Hardly / Scarcely had I closed my eyes when someone knocked at the door.
我刚一闭上眼，就有人在敲门了。
I had hardly / scarcely entered my room when the telephone rang.
＝Hardly / Scarcely had I entered my room when the telephone rang.
我刚一走进房门，电话就响了。
sb. had hardly（＝scarcely）done sth. when. . . ＝Hardly / Scarcely had sb. done sth. when...
02.when，while，as引导时间状语从句的区别
比较until和till
03.比较until和till
否定句：
She didn’t arrive until 6 o’clock. 她直到6点才到。
Don’t get off the bus until it has stopped. 公共汽车停稳后再下车。
I didn’t manage to do it until you had explained how. 直到你教我后，我才会做。
肯定句：
I slept until midnight. 我一直睡到半夜时醒了。
Wait till I call you. 等着我叫你。
（在肯定句中可用before代替。例如：Let’s get in the wheat before the sun sets.）
until和till:此两个连词意义相同。肯定形式表示的意思是＂做某事直至某时＂，动词必须是延续性的。否定形式表达的意思是＂直至某时才做某事＂。动词为延续性或非延续性都可以。正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。
03.比较until和till
01
02
03
04
（1）until可用于句首，而till通常不用于句首。
Until you told me, I had heard nothing of what happened.
直到你告诉我以前，出了什么事我一点也不知道。
（2）until when 疑问句中，until要放在句首。
—Until when are you staying?
—Until next Monday.
注意：否定句可用另外两种句式表示。
（3）Not until...在句首，主句用倒装。
Not until the early years of the 19th century did man know what heat is.
直到19 世纪初，人类才知道热为何物。
Not until I began to work did I realize how much time I had wasted.
直到工作，才认识到我已蹉跎了许多岁月。
（4）It is not until... that...
It was not until I began to work that I realized how much time I had wasted.
区别
（5）表示＂一……就……＂的结构
区别
跟踪训练
04.跟踪训练
When
While / When
as
when/as
1. ____________ he comes tomorrow, I shall ask where he has been.
2. ____________ he was speaking, everybody listened carefully.
3. I saw her just ____________ she was getting off the train.
4. Have a good look at that man ____________ you pass him.
在下列各句的空格中填入适当的连词：
跟踪训练
when
when
when
while
while
跟踪训练
10. I listen to the recorder ____________ I have time.
11. He had learned Chinese ____________ he came to China.
12. ____________ the work was done, we sat down to sum up experience.
13. I haven’t seen him ____________ he moved to the other side of the town.
跟踪训练
till/until
1
2
3
4
until
before
as soon as
跟踪训练
before
when
As soon as
when
跟踪训练
until
while
While
24. ____________ I understand your viewpoint, I don’t agree with you.
As
22. He always stay in bed ____________ lunch time.
23. I like playing tennis ____________ my younger sister prefers watching ball games.
25. ____________ she grew older, she became more responsible.
跟踪训练
真题再现
05.真题再现
1. Before the sun ____________, we need to get to the top of the mountain.
B
句意：太阳落山之前，我们需要到达山顶。Before 引导的时间状语从句不能用将来时态，用一般现在时态来代替，主语the sun单三，谓语动词用单数形式；故选B。
真题再现
2. —It has been much easier for me to go to work ________ shared bikes appeared.
—But they also caused plenty of problems.
A
句意：—自从共用自行车出现以来，我就更容易去上班了。——它们也造成了很多问题。考查连词辨析题。A. since自从……，后接时间名词或从句，表一段时间，用于现在完成时；B.before在……以前，表时间；C. unless除非，表条件；D. though尽管，表让步。本句是时间状语从句，可排除CD两项。根据句意结构和语境，可知before不合句意，故选A。
跟踪训练
3. Yesterday, I ____________ the subway home when I suddenly found I was on the wrong line.
B
took
was taking
had taken
解析：句意：昨天，当我突然发现我拨错电话的时候，我正在乘地铁回家。这里是when引导的时间状语从句，当某个动词发生的时候，某个动作正在进行，根据题意，故选B。

跟踪训练
4. Tony was drawing a picture ____________ I was doing my homework.
C
A. if
C. while
B. because
D. until
句意：Tony 正在画画，而我在做作业。本题考查连词。由前后两句话的 was doing 能发现是两个过去进行时的动作，因此可以选用 while 链接，属于时间状语从句。与 A. if 引导的条件状语从句和 B. because 引导的原因状语从句无关。而 D. until 表示直到，与原句逻辑关系不符。故正确答案为C。
解析
跟踪训练
5. I will call you as soon as he ____________ here.
C
【解析】句意：他一到这里我就给你打电话。As soon as引导的时间状语从句，遵循“主将从现”的原则，也就是当主句是一般将来时，从句用一般现在时态，从句中的he是第三人称单数，动词用三单形式，故选C。
跟踪训练
6. —Do you know when Mrs. White ____________ for dinner this evening?
—No, but I think she when she is free.
A
句意：——你知道怀特太太今晚是否来吃晚饭吗？——不知道。但我认为她有时间的话她会来。问句为宾语从句，根据this evening今晚，可知句子为一般将来时，构成：will do.回答是when引导的时间状语从句。从句是一般现在时，主句应用将来时。故答案是A。
跟踪训练
7. —I want to know if he ____________ back tomorrow.
—I’ll call you as soon as ____________
B
解析
【句意】句意：——我想知道他明天是否回来。——他一回来我就打电话给你。分析句子得知，在I want to know if he _____back tomorrow中，if引导的宾语从句，意思是＂是否＂而不是＂如果＂，时态不遵循主将从现，根据后文tomorrow，故用一般将来时态will come；下文中as soon as 表示一……就，它引导的时间状语从句，主句是一般将来时，as soon as 引导的条件状语从句用一般现在时，结合句意和语境可知选B。
跟踪训练
8. It is known to all that the day becomes shorter and shorter ____________ winter comes.
B
A.
before
B.
when
D.
since
C.
until
解析
句意：众所周知，当冬天到来时，白天变得越来越短。A. before＂在……之前＂；B. when＂当……的时候＂；C. until＂直到……为止＂；D. since＂既然；由于＂。故选B。
跟踪训练
9. I won’t go home ____________ the rain stops.
C
A. since
B. so
C. until
【解析】句意：直到雨停了我才回家。A. since自从，引导时间状语从句；B. so所以，引导原因状语从句；C. until直到……才，引导时间状语从句。根据句意，可排除A和B，故选C。
跟踪训练
10. The students were singing happily ____________ I passed the school hall.
A
【解析】句意：当我经过学校大厅的时候学生们正在欢快地唱着歌。根据题干前半句The students were singing happily学生们正在欢快地唱着歌，后半句I passed the school hall. 我经过学校大厅可推知句子是一个时间状语从句，when当……时候；unless除非；though尽管，只有A选项符合题意。故选A。
跟踪训练
模拟训练
06.模拟训练
1. ― Could you tell me when he ____________ back?
— Sure. He will come back as soon as he ____________ the classroom.
A
解析
【解析】句意：——你能告诉我他将什么时候回来吗？——当然可以。他一打扫完教室就会回来。本题第一句是宾语从句，第二句是时间状语从句。根据回答He will come back...可知，本题第一空用一般将来时；第二空主句是一般将来时，as soon as引导的时间状语从句用一般现在时。故选A。
模拟检测
2. I’ll go to visit your uncle as soon as I ____________ Beijing.
A
模拟检测
解析：句意：Mr.Liu自从来到我们学校，就开始教我们英语。A. until直到……；B. because因为；C. though尽管；D. since自从。这里是since引导的时间状语从句，遵循主句用现在完成时，从句用一般过去时态。根据题意，故选D。
3. Mr. Liu has taught us English ____________ he came to our school.
D
A. until
B. because
C. though
D. since
模拟检测
4. My father was reading a newspaper ____________ my mother was cooking dinner.
B
【解析】句意：我的父亲正在读报纸，而我的母亲正在做晚饭。when当……时候；while然而，表示两者进行对比；as soon as一……就……；until直到……。此处是我父亲和母亲所做的事进行对比，故用连词while。故选B。
模拟检测
句意：许多学生直到离开学校后才认识到学习的重要性。when当……时候；until直到……；as当……时候；after在……之后。not… until…＂直到……才……＂，故选B。
5. Many students didn't realize the importance of study ____________ they left school.
B
模拟检测
6. It’s been five years ____________ we met last time.
C
A.
for
B.
when
C.
since
D.
if
7. A good storyteller must be able to hold his listeners’ curiosity(好奇心) ____________ he reaches the end of the story.
D
解析：句意：一个好的讲故事的人必须能够保持听者的好奇心，直到他到达故事的结尾。if如果，引导条件状语从句；unless除非，如果不；after在……之后；until 直到……时候。根据句意可知，讲故事的人应该保持听者的好奇心一直到故事讲完，故应选D。
模拟检测
8. The TV programme The Readers (朗读者) was already over ____________ he got back home yesterday.
D
模拟检测
9. —What were you doing ____________ the fire happened?
—I was watching TV at home.
C
A. if
B. while
C. when
D. since
解析:
模拟检测
10. ____________ I saw the delivery man（快递员）cycling towards me, I knew that was my gift.
A
解析：句意：当我看到送货员骑着自行车向我跑来时，我知道那是我的礼物。A. As同时，当……时；B. Although尽管，表转折；C. Before在……之前，表时间；D. While与……同时，表时间。本句是时间状语从句，根据句意，BC两项与句意不合，可排除。as和while都可接时间状语从句，表示主句和从句的动作同时进行，但用法有别。如果主句和从句表示的是两个同时(或几乎同时)发生的短暂性（非持续性）动作，需用 as / when，而不可用while。结合句意和语境，可知选A。
模拟检测
if
because
until
since
解析：句意：汤姆不相信地震有多么可怕，直到他经历了一次地震。A. if连词，如果，引导条件状语从句；B. because连词，因为，引导原因状语从句；C. until连词，直到……，引导时间状语从句，not...until...直到……才……。D. since连词，自从，引导时间状语从句。故选C。
11. Tom didn’t believe how terrible the earthquake was ____________ he experienced one.
C
模拟检测
12. It has been about half a term ____________ Sandy went into junior high school.
句意：自从桑迪上初中以来，已经有半个学期了。A. though即使，尽管；B. when在……时；C. if如果；D. since自从……以来。连词通常引导状语从句，其中，though引导让步状语从句，if引导条件状语从句，when和since引导时间状语从句。本句是时间状语从句，可排除A、C两项。而when表示主句和从句的动作同时发生，和题意不合，排除。根据句意，故选D。
D
模拟检测


课堂小结
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