时间状语从句讲解

合集下载
  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

(adverbial clause of time )

概念:在复合句中,由时间连接词引导的状语从句叫做时间状语从句。(在复合

句中,要注意主句和从句的时态大多都要保持一致。)

1. 由when, while, as ,after,before,since,untill, 引导的时间状语从句。例如:

When you think you know nothing, the n you begi n to know someth ing. 当你以为自己一无所知的时候,你就是在开始知道一些事物了。

When truth is buried under the ground it grows, it chokes, it gathers

such an explosive force that on the day it bursts out , it blows up everything

with it.当真理被埋在地下的时候,它在生长,它感到压抑,它蓄存着这么一种爆炸

性力量,一旦冒出,它就会炸破一切!

Strike while the iron is hot. 趁热打铁。

You can feel the air moving as your hand pushes through it. 当你的手

在空气中挥动的时候,你就能感觉到空气在流动。

Our headmaster laughed as she spoke. 我们的校长边谈边笑。

主要时态:主过从过;主将从现;主句为一般现在时,从句不受影响。

编辑本段when, while 和as的区别

when引导的从句的谓语动词可以是延续性的动词,又可以是瞬时动词。并且when

有时表示“就在那时”。例如:

When she came in, I stopped eat in g. 她进来时,我停止吃饭。(瞬时动词)When I lived in the countryside, I used to carry some water for him.

当我住在农村时,我常常为他担水。(延续性的动词)

We were about to leave whe n he came in. 我们就要离开,就在那时他进来了。

While引导的从句的谓语动作必须是延续性的,并强调主句和从句的动作同时发

生(或者相对应)。并且while 有时还可以表示对比。例如:

While my wife was readi ng the n ewspaper, I was watch ing TV. (was readi ng

是延续性的动词,was reading 和was watching 同时发生)

I like play ing football while you like play ing basketball. 我喜欢踢足球,

而你喜欢打篮球。(对比)

As表示“一边……一边”,as引导的动作是延续性的动作,一般用于主句和从

句动作同时发生;as也可以强调“一先一后。例如:

We always sing as we walk. 我们总是边走边唱。(as表示“一边..... 一边”)As we was going out, it bega n to snow. 当我们出门时,开始下雪了。(as 强调句中两个动作紧接着先后发生,而不强调开始下雪的特定时间)

2. 由before 和after 引导的时间状语从句。注意before引导的从句不再用否定

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”。还要注

意主句和从句之间的时间关系。当主句用将来时,从句总是用现在时;如果before 引导的主句谓语用的是过去完成时,则从句动词多用一般过去时,这样以便体现动作

发生的先后。After表示主句动作发生在从句动作之后。主句和

It will be four days before they come back. 他们要过四天才能回来。

Ein ste in almost kn ocked me dow n before he saw me. 爱因斯坦几乎把我撞倒

才看到我。

My father had left for Can ada just before the letter arrived. 我父亲恰

好在信到之前去加拿大了。

They had not bee n married four mon ths before they were divorced. 他们]

结婚还不到四个月就离婚了。

After you think it over, please let me know what you decide. 你仔纟田考虑过以后,告诉我你是怎样决定的。

After we had fin ished the work, we went home. 完成工作之后,我们回家了。

(从句用过去完成时,主句用一般过去时)

3. 由till 或until引导的时间状语从句。till 和until 一般情况下两者可以互

换,但是在强调句型中多用un til 。并且要注意的是:如果主句中的谓语动词是瞬时

动词时,必须用否定形式;如果主句中的谓语动词是延续性动词时,用肯定或否定形式都可以,但表达的意思不同。till 不可以用在句首,而un til可以放在句首。例

如:

I did n't go to bed un til (till ) my father came back. 直到我父亲回来我

才上床睡觉。

It was not until the meeting was over that he began to teach me Englis

h.直到散会之后他才开始教我英语。

I worked un til he came back.

I did n't work un til he came back.

Please wait un til I arrived.

的动词,又可以是瞬时动词。一般情况下,语动词用现在完成时。但在It is +时间+ since从句的句型中,主句多用时。例如:我工作到他回来为止。

他回来我这才开始工作。在我到达之前请等我。

4.由since引导的时间状语从句。since 引导的从句的谓语动词可以是延续性

从句谓语动词用一般过去时,而主句的谓

般现在

I have been in Beijing since you left. Where have you bee n since I last saw you? 自从你离开以来,我一直在北京了。自上次我和你见面以后,你到哪里去

了?

It is four years since my sister lived in Beiji

ng. 了。

我妹妹不在北京住有四年

相关文档
最新文档