as引导的五种状语从句

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as 引导的五种状语从句 as 作从属连词用时,可以引导五种状语从句。

现归纳如下: 1. as 表示“当……的时候”,引导时间状语从句,多强调主句和从句中的动作或状态同时发 生,从句可放在主句前,也可放在主句后。

例如: As I waited at the stop, I heard a big noise. 当我在车站等车的时候,我听到一个很大的 声响。

She rose up as he entered. 当他进来时,她站了起来。

2. as 表示“因为”、 “由于”,引导原因状语从句,其语气不如 because 强,通常为附加说明的 理由,且是已知晓的原因,主句与从句没有逻辑上的因果关系。

例如: As she was not well, I went there alone. 因为她身体不好,所以我独自到那里去了。

As he is a tailor, he knows what to do with this material. 由于他是个裁缝,他知道怎样 利用这块布料。

3. as 表示“虽然……但是……”,引导让步状语从句,从句通常用倒装语序,把从句的表语、 状语或动词原形放在 as 前面,可以用 though 替代。

例如: Child as he is, he knows a lot. 虽然他是个孩子,但他知道的东西很多。

Hard as it was raining, they went on working in the field. 虽然天下大雨,但他们继续在 田地里干活。

4. as 表示“按照”、“依照”、“像”,引导方式状语从句,从句置于主句之后。

例如: You should do as the teacher tells you.你应当依照老师所说的去做。

The absence of air also explains why the stars do not seem to twinkle in space as they do from the earth. 空气的不存在,也说明了为什么在空中星星看来并不闪烁,而不像从 地球上看的那样。

5. as 表示“像……一样”,引导比较状语从句,对主句和从句的动作或状态加以比较,说明 它们之间有相似之处,在从句中常省略与主句相同的部分。

例如: He doesn't work as hard as I (do). 他不像我工作那样努力。

I hope the necklace was as good as the one you lent me.我希望我挂项链同你借给我 的一样好。

连词 as 引导的状语从句 Proud as these nobles are,he is afraid to see me. 在这个句子中,as 是一个连词,引导让步状语从句。

与常见的让步从句不同的是,这 个状语从句的结构有点特殊;表语放在了句首。

作为连词,as 极其活跃,能引导多种状语 从句,本文拟将这一用法作一归纳。

1、引导时间状语从句 As you study a globe,you may notice that most of the large land areas are connected,or almost so.(高一册,第 267 页) As the steam expands,the temperature falls.当水蒸汽膨胀时,温度就下降。

Just as I was backing out,my sleeve caught on the corner of a tray of diamonds.(高三册,第 225 页) 2、引导原因状语从句 As Li Ping was not well,I went there myself.(高一册,第 96 页) As water is a good solvent,pure water is never met with in nature. 因为水是一种很好的溶剂,所以在自然界从未遇见过纯水。

as 引导的原因状语从句也可以采用倒装结构,如: Tired as he was,he want to bed at once.他因为很累,所以马上就去睡了。

Michael,fool as he was,completely ruined the dinner. 又与迈克尔的愚蠢,这次宴会给搅乱了。

Absorbed as he was in a mathematical problem,he did not notice my entering the room.由于他全神贯注在解一道数学题,所以没有注意到我走进房间。

But,living as it does in a community of cells,it is not independent at all.(高二册,第 336 页) Living as we do in a remote village,we have few visitors. 由于我们住在一个偏僻的村子里,所以没有什么来客。

3、引导让步状语从句,其结构如下: 1)adj.+as+主语+系动词 be,… Young as he is,he knows a lot of things.他年龄不大,可知道的事情却不少。

Poor as he was,he was honest. Hard as steel is,it will bend or break under the action of a strong force.刚虽然很硬,但在强力作用下也会弯曲或断裂。

2)n.+as+主语+系动词 be,… Child as he is,he knows a lot of things.他虽然是个孩子,可知道的事情却不少。

King as he is,he is unhappy. Expert as he was,he failed.他虽然是专家,但还是失败了. 注意在本句型中, 句首的单数可数名词前不用冠词。

试比较下面这个与第一句意义相同 的句子: Although he is a child,he knows a lot of things. 3)adv.+as+主语+动词,… Much as I like it,I won’t buy it.尽管我很喜欢它,但我却不买。

Fast as you read,you can’t finish the book in two days. 尽管你读得很快,你也不能在两天之内读完这本书。

4)4)v.(原型)+as+主语+助动词,…

Try as you may,you will never succeed.无论我怎样寻找,也未能发现他的踪影。

4、引导方式状语从句 The absence of air also explains why the stars do not seem to twinkle in space,as they do from the earth. (高二册,第 198 页)太空中没有空气,这也说明了为什么在太空星星看来并不闪烁,不 想从地球上看到的那样。

Solids expand and contract as liquids and gases do. 固体像液体和气体一样也会膨胀和收缩。

as 在引导方式状语时,前面可以有加强语气的 just: Just as sound is a wave motion,light in the same sense,may be regarded as a wave motion.正如声音是一种波动一样,光也同样可以看作是一种波动。

I knew his wife must be praying for him,just as I was praying for James.我知道他妻子一定在为他祈祷,正如我为詹姆斯祈祷一样。

Electricity flows through a wire just as water flows through a pipe. 电通过导线,就像水流过管子一样. 5、比较状语从句 They produce gases almost as harmful as the gases form factories. (高一册,第 194 页) You know as much about that as I do.

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