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带你步入魔法世界:《哈利•波特与魔法石》赏析(60)

时间:2012-01-19 10:57:31 来源:可可英语 编辑:lily  每天三分钟英语轻松学

The late afternoon sun hung low in the sky as Harry and Hagrid made their way back down Diagon Alley

Harry didn't speak at all as they walked down the road;

as 的用法总结

一、as作连词的用法

1. as用作连词引导时间状语从句

as与when,while都是引导时间状语从句的从属连词,含义都是"当……的时候"。但它们有区别:用when时,从句的动作可以与主句的动作同时发生,也可以先于主句的动作发生;用while时,从句的动作为一过程,主句动作与从句动作同时进行或在从句动作过程中发生;用as时,主句和从句的动作同时发生,具有延续的含义。例如:

It was snowing when he arrived at the construction site.他到达工地时,天正在下雪。

2. as用作连词引导原因状语从句

as,because,since都可以表示因果关系,连接原因状语从句,含义是"因为,由于",但它们有区别:because表示的语气最强;as一般放在句首,语气较弱,较口语化;since常常用在书面语中,表示多为对方已知的、或稍加分析便可得知的原因,有时可译作"既然"。例如:

He will succeed because he is in earnest.他一定会成功,因为他很认真。

3. as作连词引导让步状语从句

as与although (或though),however (或no matter how)等都可以引导让步状语从句,含义是"虽然,尽管",但它们有区别:although语气稍正式些,可放在句首,也可放在句中,主句中不能再用but,但可以用yet;as所表示的语气较强,引导的让步状语从句用倒装语序;however引导让步状语从句时,它的后面可跟形容词或副词,也要用倒装语序。例如:

(1) Although he is quite old, he still jogs every day.他虽然年纪相当大,仍然每天慢跑。

二、as作关系代词的用法

关系代词as引导定语从句时,既可以单独使用,也可以与其他词连用,其用法要比that和which更为复杂。

1. as引导定语从句与其他词连用

①用于the same...as结构中

This is the same book as I read last week.这本书和我上周读的那本是一样的。

②用于such...as结构中

I don”t like such books as he recommends.我不喜欢他推荐的那些书。

③用于"so +adj. + a/an + n. (单数) + as "结构中

I am not so strong a man as I was.我已经没有从前那么强壮了。

2. as单独引导定语从句

as单独引导定语从句时,先行词可以是一个词,也可以是一个句子或短语。例如:

She is late, as is often the case.她迟到了,这是经常的事。(先行词是整个主句)

三、as作介词的用法

as作介词,意思是"作为","以……身份"。例如:

He came to China as a tourist five years ago.他五年前以游客的身份来过中国。

四、as作副词的用法

to the same degree or amount; equally "相同地","同样地"。例如:

They don”t have as many airplanes.他们没有同样多的飞机

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