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语法讲解-时间状语从句的用法解析及练习

语法讲解-时间状语从句的用法解析及练习
语法讲解-时间状语从句的用法解析及练习

语法讲解时间状语从句的用法解析及练习状语从句在复合句中作状语,其位置较灵活,可以在主句之前、之后或中间(放在句首

时状语从句后面常用逗号,放在句末时状语从句前面往往不用逗号)。根据状语从句的含义,状语从句主要分为时间状语从句、地点状语从句、原因状语从句、目的状语从句、方式状语从句、结果状语从句、条件状语从句、让步状语从句等八种。掌握以上各种状语从句的关键在于把握其相应的引导词。以下是对时间状语从句的基本用法进行小结,希望可以帮助到同学们有一更深的理解。

时间状语从句的引导词

when, before, after, as, while, till/until, since ,whenever

时间状语从句的用法

时间状语从句的引导词所表示的意思不尽相同,要注意把握不同的时间状语从句的引导词所表示的不同时间关系,以及它在具体句子中对应的对应时态、语态等问题。

1. when 、as 、while 引导的时间状语从句分析:

(1) when引导时间状语从句时表示“当……的时候”,when既可以指时间段也可指时间点,

从句中既可用延续性动词又可用非延续性动词,且动作既可和主句的动作同时发生又可在主句的动作之前或之后发生。

注意体会如下例句:cIa'll lyl ou when I get there. 我一到那里就给你打电话。//

When the wind blows, all the doors rattle. 只要风一吹,这门就吱嘎作响。// He stopped trying, when he might have succeeded next time. 他不再试了,其实他可能

下一次就成功。// When I came home my wife was cooking dinner. 我回家时,妻子在

做晚饭。

如果when 引导的时间状语从句的主语与主句主语相同,而从句的谓语又是be 动词时,那么从句中的主语和be 可以省略;当when 引导的时间状语从句的主语与主句主语相同时,往往还可以用“ when+ 分词”的形式替代该状语从句。例如:When (you are) in trouble, ask her for help. 当你遭遇麻烦的时候去向她求助。// When I came into the room (=When coming into the room), I found him lying there asleep. 当我进入房间的时候,我发现他躺在那儿睡着了。

⑵while引导时间状语从句时表示“当……的时候”,它强调主句的动作与从句的动作同时

持续地进行,用于这一用法时while 引导的时间状语从句和主句中的谓语动词必须是延续性动词,或者主句的动作发生在从句动作的进行过程中,主句中的谓语动词通常是非延续性动

词,例如:Study while you study; play while you play. 该学习的时候就学习,该玩的时

候就玩。// I met her while I was at school. 当我在学校的时候我遇见了她。

(3) as引导时间状语从句时表示“当... 时,一边... 一边... ”,侧重表示两个动作同时发

生(包括一个主语同时进行两个动作),或者一种动作随着另一种动作的变化而变化。例如:

He jumps as he goes along. 他边走边跳。// I slipped on the ice as I ran home. 我跑回家时在冰上滑了一跤。// I saw him as he was getting off the bus. 正当他下公共汽车时, 我看见了他。// As the wind rose the noise increased. 刮风的时候噪声增大。

[ 考题1] I had just steeped out of the bathroom and was busily drying myself with a

towel ___ I heard the steps.

A. while

B. when

C. since

D. after

[答案] B

[解析]下划线处表示“正在这时,突然……”,四个选项中只有when可以表示此含

义。

[考题2] He was about halfway through his meal a familiar voice came to his

ears.

A. why

B. where

C. when

D. while

[答案] C

[解析]下划线处表示“正在这时,突然……”,四个选项中只有when可以表示此含

义。

[考题3] We were swimming in the lake suddenly the storm started.

A. when

B. while

C. until

D. before

[答案] A

[解析]题意为“当我们正在湖里游泳的时候突然暴风雨开始了”,表示主句的动作处于从句的动作突然发生时应采用when(while 不适合用于这样的语境),when 表示“当…… 的时候”受限制条件最少。

[考题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

[答案] B

注意:如果主句的动作发生于表示;当……时”的时间状语从句中的动作的进行过程中,

[解析]主句中“ get me some stamps ”的动作发生在时间状语从句“you

re there 的过程之中,因此应选while 表示这一时间关系(属于while 引导时间状语从句的两大基本用法之

一)。因此 B 选项是最佳选项。

从句常用进行时。例如:The landlady suspected that someone must have broken into the house

when/while/as she was watching TV show. 女房东怀疑在她看电视时曾有人

闯入屋里。// When/While/As Tom was reading, Jim was arrested. 在汤姆看书的时候,

吉姆被逮捕了。

[ 考题5] I __ along the street looking for a place to park when the accident __ .

A. went; was occurring

B. went; occurred

C. was going; occurred

D. was going; had occurred

[答案] C

[解析] 根据题干句子含义,事故发生于当我沿街行驶、寻找停车之处的时候;从句的动

作发生在主句动作的过程中。主句的谓语动词go 表示非延续性的动作,可以持续进行,应选用过去进

行时的形式,从句的谓语动词为非延续性动词,应以一般过去时的形式表结果。

2. before 和after 引导的时间状语从句分析:

before 引导时间状语从句时表示主句的动作发生在从句动作之前,after 引导时间状语

从句时表示主句的动作发生在从句动作之后。例如:See me before you leave. 在你离开之前来见我。

// Before they drive any of the buses, they will have to pass a special test. 在驾驶公共汽车之前,他们必

注意:如果主句的动作发生于表示;当……时”的时间状语从句中的动作的进行过程中,须通过专门测验。// I saw them after I arrived. 在我抵达之

后,我见到了他们。// I found his pen after he has left. 在他走后,我找到了他的笔。

[ 考题6] He was told that it would be at least three more months __________________ he could recover and return to work.

A. when

B. before

C. since

D. that

[答案] B

[ 解析 ] 表示“他康复并返回工作岗位之前至少还需要三个月”,下划线处应选用

before 。

[ 考题 7] It was some time ___ we realized the truth.

A. when

B. until

C. since

D. before

[答案] D [解析 ] 题干意

为:

过了一段时间我们才意识到真相。 下划线处应填入表示“在……之前”

的连词。 3. till 和 until 引导的时间状语从句分析:

till 和 until 这两个词作连词和介词时的意义和用法相同,一般可以换用 (放在句首时通 常用 until 的形式, till 在口语中更为常见 )。 till 和 until 引导时间状语从句时跟主句里肯定 形式或否定形式的、表示延续性动作的谓语动词连用表示“到……为止”,跟主句里否定形

式的、表示非延续性动作的谓语动词连用表示“直到……才

lesson.

A. until

B. after

C. since

D. when

[答案] A [解析 ] 题干的句子可以直译为:“在我们一生中,学到某个教训是困难的,直到我们 真正经历了这个教训为止。

come to a white house.

一直走到一座白房子为止。 // We didn ' t discuss the problem

until he came back. 我们一直等到他回来后才讨论问题。 [ 考题 8] It is difficult

for us to learn a lesson in life ___ we ' ve actually had that

(开始)",例如:Walk till you

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1. 在含有主语从句的复合句中, 为保持句子平衡, 常用it作形式主语,而将真正的主语从句置于句末. It's well-known that water is indispensable to life.(形式主语) 2. 为保持句子平衡, that引导的宾语从句也常用it代替, 而将真正的宾语从句置于主句句末。这常常出现在主句有形容词或分词作宾语补足语的情况下。 He made it quite clear that he preferred to live here. 3. 从属连词whether和if都作“是否…”解, 但if不可引导主语从句和表语 从句。whether可与or(not)连用, 而if不可以。 I don't know whether (if) she is at home. Whether she comes or not makes no difference. 4. that和what引导名词性从句的区别: that在从句中不充当成分,而what在从句中充当一定的成分, 如主语、表语、宾语等。that可省略, what则不可省。 He always means what he says. She suggested (that) he do it at once. 5. 同位语从句大多由从属连词that引导, 常跟在下列名词后面, 如fact, idea, opinion, news, hope, belief等, that不可省。同位语从句一般用来解释说明这些名词的具体含义和内容。 We are familiar with the idea that all matter consists of atoms. The news that we are invited to the conference is very encouraging.

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的,发生时间较长,并强调主句和从句的动作同时发生(或者相对应)。While 有时还可以表示对比。While John was watching TV, his wife was cooking. as 意为“一边…一边…”。As 引导的动作是延续性的, 发生时间较短,一般用于 主句和从句动作同时发 生;as也可以强调一前一 后。The writer was angry as he was travelling on a train to London because someone had invaded his “space”. He smiled as he stood up. after 意为“在…之后”。表示主句 动作发生在从句动作之 后。主句与从句的动作时 间关系与before引导的从 句相反。With many hungry visitors waiting, don’t stay too long at your table after you have finished. If an early exit is necessary, you can leave after a scene is over. before 意为“在…之前”。引导的从 句不用否定形式的谓语, 并且当before引导的从句 位于主句之后,有时译成 “就,才”。当主句用将来时,You can’t watch TV before you finish your homework. Before it ended, the theatre was almost empty. My father had left for Canada

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