高一英语as的用法.as在定语从句中的用法.楼下的，我不是问as是啥，我是问as在定语从句中的用法！

高一英语as的用法.as在定语从句中的用法.楼下的，我不是问as是啥，我是问as在定语从句中的用法！
高一英语as的用法.
as在定语从句中的用法.
楼下的，我不是问as是啥，我是问as在定语从句中的用法！

高一英语as的用法.as在定语从句中的用法.楼下的，我不是问as是啥，我是问as在定语从句中的用法！
系代词 as 用于引导非限制性定语从句时,应注意以下三点：
一. as引导的非限制性定语从句位于句末时,一般可以和which互换.
The author was brought up in a small village, as (which) is recounted in some of his stories.
作者是在一个小村庄里长大的,这个问题在他的一些小说了就被提到过.
She is extremely popular among the students, as (which) is common knowledge.
她在学生中间很受欢迎,这是普遍知道的.
但是,当主句是否定句时,as和which就不能互换,因为as引导的非限制性定语从句不包含否定意义.
Spiders are not insects, as many people think.
蜘蛛不是昆虫,而许多人却认为蜘蛛是昆虫.
二. as引导的非限制性定语从句可以放在句子的最前面,而which引导的定语从句不能放在句首.
As is often the case, the girl forgot to her dictionary.（不能用which）
经常是这样子的,那个女孩忘了带字典.
As you will find out, all is now settled.
你将会看到这样的情况,一切都已搞定了.
三. as引导的非限制性定语从句可以放在句子的中间,which引导的定语从句也可以放在句子的中间.
Water, which is a clear liquid, has many uses.
水是一种透明的液体,有许多用途.
Taiwan is, as you know, an inseparable part to China.
众所周知,台湾是中国不可分割的一部分.
[解题过程]
关系代词as 与which引导非限制性定语从句可以用整个主句作为其先行词,指代上面或下文所说的一件事.但何时用as,何时用which, 初学者在实际运用时常出现差错.现就as 与which在引导这种定语从句时所出现的不同词义和句法特点进行对比、分析如下.
一、as引导的从句表示说话人对话语的看法、态度、解释或评论.
一般有以下特点：
1、此时的as仍具有“正如、象、由……而知、与……一致”等某些作连词时的语义.翻译时有时可不必译出.如：
Shakespeare is a famous writer, as we all know. 莎士比亚是著名的作家, 这众人皆知.
She is very patient, as is shown in her work. 她很耐心,正如她工作中所表现出来的一样.
2、在句法上,as常用作一些实意动词(如see, know, hear, watch, remember, say, tell, show, expect, guess等)的宾语,这类动词与as几乎成了一种固定搭配.如：
Einstein, as we know(=as is well known), is a famous scientist. 众所周知,爱因斯坦是一位著名的科学家.
There was a net bar around here, as I remember. 我记得这儿附近有一家网吧.
3、当从句的谓语动词是否定形式或从句谓语动词带的是一个复合宾语结构时,一般用which而不宜用as.如：
You pretended not to know me, which I didn’t understand. 他假装不认识我,我真不明白.
He admires everyone in the class, which I find quite strange. 他羡慕班里的每个学生,我认为太奇怪了.
4、as 从句可以前置（而which从句则不可）.如：
As can be seen, oceans cover more than 70% of the earth. 很容易看出大洋占了地球的70%还多.
二、which引导的此类从句对主句所叙述的事情进行补充说明,表明事物的状态或结果.
一般有下列特点：
1、which此时就指前面主句所提到的这件事,常译为“这一点、这件事”等.主句与从句通常要用逗号隔开,只能位于被修饰句子的后面.如：
The child had a fever every night, which worried his parents very much. 这孩子每晚发烧,这使他父母非常焦急.
2、which在句法上一般用作实意动词的主语,这时它所引导的从句与主句之间常含有并列、因果关系.如：
I bought my sister a big toy, which(=and that) delighted her greatly. 我给妹妹买了一个大玩具,这使她非常高兴.
3、在从句中作定语或介词宾语时,要用which.如：
She might possibly come, in which case I’ll ask her.她可能会来的,要是那样的话我就去问她.
4、不能省去非限制性定语从句中的be动词时,用which (反之则用as).试比较：
Jane told me she won the match, which was a lie. (was 不可省略)
As (was ) planned, we met at the airport.(可省略was)

在限制性定语从句中,as多和such和the same连用,在从句中充当主语宾语或表语.例如,
1. I've never seen such a talented young man as he is. 我从未见过像他这样才华横溢的年轻人.（as作表语）
2. Such books as I have read are classical works.我所读过的书都是些经典著作.（as 作宾语）
区分such...as与such.that的区别
He is such a good teacher as every student likes.(as充当宾语)
He is such a good teacher that every student likes him.（从句中不缺少成分,such...that 引导结果状语从句）
the same...as虽然在结构上与the same...that相同,但有时句意却不一样.比较：
This is the same pen as I uesd last week.这和我上周用的那支笔是一样的.（不是同一支）
This is the same pen that I used last week.这就是我上周用的那支笔.（同一支）
此外,as在非限定定语从句中也有应用,例如
The murderer was finally arrested by the police, as was expected. 如我们所愿,杀人犯最终被警察逮捕了.
其实as更多的是用在句首,有时会用在句中,或句尾,而且多出现在固定搭配中,如
as is well known,.众所周知
as is often the case,.情况常常如此
as may be imagined,.可以想象得出
as was said before/mentioned above,.如前面所说的/如上文所提

as
副词 ad.
1.跟...一样地,同样地
Sam is as rich as Alexander.
山姆像亚历山大一样富有。
2.如同;例如
Such animals as foxes and squirrels have bushy tails.
有些动物,如狐和松鼠,有蓬松的尾巴。
介词 prep.
1....

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as
副词 ad.
1.跟...一样地,同样地
Sam is as rich as Alexander.
山姆像亚历山大一样富有。
2.如同;例如
Such animals as foxes and squirrels have bushy tails.
有些动物,如狐和松鼠,有蓬松的尾巴。
介词 prep.
1.作为,以...的身份
She works as an interpreter in that company.
她在该公司里担任翻译员。
2.当作
She didn't think much of him as a painter.
她对他作为一位画家评价不高。
3.像;如同
The old woman was dressed as a young lady.
这位老妇人打扮得像一位年轻人。
连接词 conj.
1.像...一样;依照;像
You ought to do as Paul tells you.
你应按照保罗吩咐的做。
The work is not so difficult as you imagine.
这工作不像你想像的那么困难。
2.当...时
As she left the room she remembered that book.
她离开房间时想起了那本书。
3.随着
As the sun rose the fog dispersed.
太阳一出来,雾随之消失。
4.因为
We didn't know what to do as we were just visiting there.
我们不知道该怎么办,因为当时我们仅仅在那里作访问。
5.虽然
Tired as he was, he sat up late.
他虽然疲倦,可仍然很晚才睡。
代词 pron.
1.(与such,the same,as等连用,引导关系从句)与...相同的事物(或人)
He has earned as much money as I have.
他赚的钱和我赚的一样多。
She felt just the same as he did.
她和他的感受相同。
There is a general rise in prices such as occurred in the late 60's.
物价普遍上涨,跟六十年代末一样。
2.(引导从句,对前述内容作补充)本情况,该事实
She has married again, as was expected.
她已再婚,这是意料中的事。
We are tired, as anyone can see.
我们累了,这是有目共睹的。

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