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状语从句详解和练习(5)

时间:2010-09-05来源:作文地带栏目:英语语法作者:英语学习 英语作文收藏:收藏本文
(还可以用作介词,本句从句还可以用短语:since three years ago(自三年前以来)表示。) 8 till /until 都可以作连词,连接时间状语,也可以作介词,与其它词构成介词短语,在句中作状语。 They walked till /until

    (还可以用作介词,本句从句还可以用短语:since three years ago(自三年前以来)表示。)

    8 till /until

    都可以作连词,连接时间状语,也可以作介词,与其它词构成介词短语,在句中作状语。

    They walked till /until it was dark.

    他们一直走到天黑。

    Xiao Ming didn't leave home till / until his father came back.

    小明直到他爸爸回来才离开家。

    9. by the time 到。。。为止 (所在句子的主句应用完成时)

    By the time he gets there , his father has already gone.

    他到家的时候,他爸爸已经走了。

    By the time I got to school, the class had already began.

    我到校时,已经开始上课了。

    时间状语从句(adverbial clause of time)

    1.由when, while, as引导的时间状语从句。例如:

    When you think you know nothing, then you begin to know something.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。

    Will you watch my clothes while I have a swim. 我游泳的时候,请你照看一下我的衣服。

    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。

    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 eating.她进来时,我在吃饭。(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 when 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 reading the newspaper, I was watching TV. (was reading是延续性的动词,was reading和was watching同时发生)

    I like playing football while you like playing 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 began 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)

    as when while的辨析

    as when while都表示主、从句动作同时发生,三者差异如下:

    表示"一边。。。一边"的意思

    as 强调两个动作同时进行,并表示对比时

    用于发生时间较短时liuxuepaper.com

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