那些常用的as句型
那些常用的as句型
石门一中丁洁138********
as是英语中用得非常广泛而且极其活跃的一个词。它可以作介词、副词、从属连词和关系代词用,还可以同其它的词搭配,构成一些固定的词组和句型,表达各种意思。本文仅就as构成的一些常用句型作些介绍。
1.时间状语从句中的as
as引导时间状语从句,表示主句动作和从句动作同时发生,可译为“随着”或“一边......一边……”;“当......时候”,例如:
As days go by , it becomes colder and colder. (随着)
She was reading something as she was waiting for the bus to come . (当......时候; 一边......一边……)
2.原因状语从句中的as
as 引导原因状语从句,表明显的原因或已知事实。例如:
As I’m so ashamed of my body, I’m trying to lose weight.
We had to walk all the way, as we had no money for fares.
3.让步状语从句中的as
as 引导的让步状语从句以部分倒装的形式出现,从句中的表语、状语或谓语部分的实义动词要前置到句首。若作表语的名词前有冠词,需去掉冠词。例如:
Tired as we were, we didn’t give up.(形容词作表语置于句首)Child as she was , she was able to stand on her own feet.(名词作
表语置于句首)
Try as he may, he could n’t open the door. (谓语部分实义动词try 置于句首)
Much as I like it, I can’t buy it, for it is too expensive for a student. (副词作状语置于句首)
4.比较状语从句中的as
as在比较状语从句中通常与另一个as连用,构成句型as…as…,意为“和......一样”,表同级比较。使用时要注意第一个as为副词,第二个as为连词,其基本结构为:as+ adj./ adv. +as。例如:
This film is as interesting as that one(is).
Your pen writes as smoothly as mine (writes).
其否定式为not as/so +adj./ adv. +as。例如:
This dictionary is not as/so useful as you think.
若有修饰成分,如twice, three times, half, a quarter等,则须置于第一个as之前。例如:
Your bag is twice as expensive as mine(is).
5.方式状语从句中的as
as引导方式状语从句位于主句之后。例如:
Always do to the others as you would be done by.
Do as you are told to, or you will be fired.
6.定语从句中的as
as引导限制性定语从句,一般与the same 或such连用,指代前面
的先行词,在从句中充当主语、宾语或表语。
He is such a person as is respected by all of us.(作主语)
The lady wore the same dress as I bought yesterday.(作宾语)
as 引导非限制性定语从句,指代整个主句,位置比较灵活,可位于主句前,也可位于主句后,还可位于主句中间。例如:
She is a fine singer, as her mother used to be .(作表语)
As was reported, the old lady injured in the traffic accident was in hospital . (作主语)
The earth, as we know, moves around the sun.(作宾语)
7.并列句中的as
如果并列句表“也是如此”之意,可用as+be/助动词/情态动词,如:Her mother is tall and as is she.
I often go to school by bike; as do my classmates living near to our school.
She can play the piano very well and as can her sister.