非限制性定语从句which和as的用法汇总一篇
非限制性定语从句which和as的用法汇总一篇
非限制性定语从句which和as的用法 1
非限制性定语从句which和as的用法
一、相同之处
当从句位于主句之后，引导词指代整个主句所表达的全部意义时，as和which可以互换。如：
The elephant is like a snake,as/which everybody can see.
大家都看得出，这头大象像条蛇。
A big earthquake occurred there last night,as/which was reported on
TV.
据电视报道，昨夜那里发生了大地震。
She is from Shanghai,as/which I know from her accent.
她来自上海，那是我从她的口音知道的。
二、不同之处
1、as引导非限制性定语从句时，位置比较灵活，可位于主句之前，也可位于主句之中或之后;而which引导非限制定语从句只能位于主句之后，不能位于主句之前。如：
_______ is known to everybody,the moon travels round the earth.
A.It B.As C.That D.Which
答案：B
_______ is mentioned above,the number of the students in senior high
schools is increasing.
A.Which B.As C.That D.It
答案：B
Air,as we know,is a gas.众所周知，空气是一种气体。
He is very careful,as his work shows.
他的工作表现表明他非常谨慎。
as引导非限制性定语从句常有“如同.那样”的含义，因此在一些固定结构中，如：
as we know;as is known to all(众所周知)
as we all can see(正如我们大家都能看到的那样)
as has been said before/above(正如前面所述)
as might be imagined(可以想象得到)
as might be expected(正如所预料的那样)
as is often the case(情况通常是这样)
以上种种固定搭配，一般不能用which代替as。
2、搭配上，在由the same或such所修饰的名词后通常用as作关系代词引出非限制性定语从句。如：
I have got into the same trouble as he (has).
我遇到了与他一样的麻烦。
I've never heard of such a moving story as he is telling.
我从未听过像他讲得那么有趣的故事。
3、which引导的从句在意义上相当于一个并列句，可以用and this
代替，意思是“这件事”;as引导的从句主要起连接上下文的作用，表达说话人的观点、看法，并指出主句内容的根据或出处等。如：
He sold his new car,which surprised me.
=He sold his new car,and this serprised me.
Einstein,as we know,is a famous scientist.
我们都知道，爱因斯坦是一位著名的科学家。
As is known to all,__ is part of China.
众所周知，__是中国的一部分。
4、当which在从句中指代的是先行词本身而不是主句时，不可用as代替which。如：
The peach tree,which I planted last year,has not borne any fruit.
这棵桃树是我去年种下的，还没有结出任何果实。
The book,which I bought yesterday,is very instructive.
我昨天买的.这本书很有教育意义。
5、在从句中作主语时，which既可作系动词be的主语，也可作实义动词的主语，而as只可作系动词be的主语。如：
He married her,which was nature.(可用as代替which)
他和她结婚了，这是很自然的事。
She met the boy,which delighted her.(不可用as代替which)
她见到了那个男孩，这使得她很高兴。
He failed in the exam again,which made his parents very angry.
他考试有不及格了，这是他父母很生气。
6、as引导的从句在意义上不可与主语相悖，而which引导的从句则不受此限制。
Mum treats me like a baby,which I can't bear.
妈妈把我当小孩看待，这是我不能忍受的。
只用as而不用which：
一、当定语从句置于主句前面时：
例：As you see, the Chinese people are hard-working. (定语从句在句首)
你知道，中国人民是勤劳的。
注意下面句子的多种表达方法：
众所周知，月球每月绕地球转一圈。
1.As is known to everybody, the moon travels round the earth once
every month.
2. The moon travels round the earth once every month, as/which is
known to everybody.
3. It is known to everybody that the moon travels round the earth
once every month.
4.What is known to everybody is that the earth travels round the earth
once every month.
(后两句属名词性从句范畴)
二、先行词做主语且定语从句为被动语态时：
此时，从句谓语通常为： be known, be said, be reported， be
announced, be mentioned等。如果从句是主动语态，一般用which作主语。
例1：She has been absent again, as is expected.
她又缺席了，这在预料之中。
例2：Tom has made rapid progress, which makes me very happy.
汤姆进步很快，这使我很高兴。
另外，as常用在下列习惯用语中：as (it) seems likely, as (it) often
happens, as (it) was printed out, as (it) was said earlier, as I remember (it),
as I understand (it), as (it) appears, as it often the case, as anybody can see,
as we have expected.
例1：Jack has won the first prize, as it often happens.
像往常一样，杰克得了一等奖。
例2：She has read widely in Romantic Literature, as it
appearsfromher essay ・
她广泛涉猎了浪漫主义文学，这从她的文章中可以看出来。
只用which而不用as
一、关系代词代替前面主句中的宾语从句或定语从句的谓语动词后有复合宾语时：
例：I don't think that he will e to see me, which makes me sad.
我认为他不会来看我了，这使我伤心。
二、which一般用作实义动词的主语，这时它所引导的从句与主句之间存在着逻辑上的因果关系时：
例：Tom was late for school again and again, which made his teacher
very angry.
汤姆一次又一次上学迟到，这使得他的老师很生气。
三、当非限制性定语从句是否定句时：
例：He pretended not to know me, which I didn't understand.
他假装不认识我，我真不明白。
四、非限制性定语从句中的be动词不能省略时，用which反之用as.
例1：Jane told me she won the match, which was a lie.
简告诉我她赢了这场比赛，这是谎话。(was不可省略)
例2：As (was) planned, we met at the airport.
按照计划，我们在机场相见了。(was可省略)
as引导定语从句
as引导定语从句
引导定语从句的关系代词有who, whom, whose, which, that；
关系副词有where, when, why，如何确定定语从句的引导词。下面是店铺为你带来的as引导定语从句 ，欢迎阅读。
As 引导的定从
as引导的定从很多人不是很熟悉，我们下面专题讲解。
在定从中，as 是关系代词，在从句作主语或宾语。
1 限制性定从（只用在固定结构中）
(1) such +N+as….
Such inns as there were were generally dirty and flea-ridden.（as 作主语）
=There were inns and inns were generally dirty and flea-ridden.
那有一些小旅馆，旅馆通常很脏而且布满跳蚤。
Such people as are indolent are not easy to make their goals
a reality.
懒惰的人不容易实现目标。
These are such points as they discussed at the meeting.
这些是他们在会上讨论的观点。
(2) as +adj +N +as +…
You should drink as much water as is required. （第二个as 作主语）
你应该尽可能多的喝被要求喝的水。
You’d better make as few mistakes as we did.（第二个as作宾语，引导定从）
你应该尽可能少犯我们犯过的错误。
(3) the same +N +as…
He uses the same book as I bought.
他平时用的书和我之前买的那本一样。 He uses the same book that I bought.
他平时用的书就是我之前买的那本。
as引导的非限制性定语从句
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as 引导的非限制性定语从句：
1： as 引导限定性定语从句，常用于以下句式，其中关系代词在从句中担当主，宾，表语：
① so/as/such+名词+as…像……一样的，像……之类 :
We have found such materials as are used in their factory.
These houses are sold at such a low price as people expected. (00 上海)
This book is not such as I expect.
Such things as you described are rare now. (四校联考)
He isn’such a man as you described.
He is such a lazy man as nobody wants to work with (成都诊断)
=he is such a lazy man that nobody wants to work with him.
I want to have such a dictionary as he has.
I have bought such a watch as was advertised on TV.
Mount Wuyi is such an attractive place of interest as everyone likes to visit. 福建质检)
Such money as he earned was spent on spirits and tobacco.
He was not half such a coward as we took him for.
② the same +名词+as 和……同样的 :
He is not the same man as he was /used to be.
非限制性定语从句应用注意事项
非限制性定语从句应用注意事项
1.非限制性定语从句通常不能用 that 引导。
2.非限制性定语从句一般不能用 why 引导，要用 for which。
I had told them the reason, for which I didn't attend the meeting.
我已经告诉他们我没有出席会议的原因。
3.非限制性定语从句置于句首时，通常不能用 which 引导。关系代词as引导的非限制性定语从句位置比较灵活，可以放在主句前，也可以放在主句后。
As I expected, he didn't believe me.正如我所料,他不相信我。
4.非限制性定语从句由“介词+关系代词”引导时，其中的关系代词不能用 as。
He spent more than $20,000 on the car, over which his father was angry.
他买这辆车花了两万多美元，这让他父亲很生气。
5.非限制性定语从句中，指人的关系代词作宾语时，一般只能用宾格
whom，不能用 who 替换，也不能省略。
Do you know Tom, whom we talked about? 你知道我们谈论的汤姆吗?
非限制性定语从句例句
非限制性定语从句例句
非限制性定语从句例句
非限制性定语从句
非限制性定语从句的作用是对所修饰的成分作进一步说明，通常和主句间用逗号隔开，将从句拿掉后部分仍可成立
1. which引导的非限定性定语从句，可用来说明前面整个句子的情况或主句的某一部分。如：
She heard a terrible noise，which brought her heart into her
mouth．
David studies hard and is ready to help others，which is what
his parents expect．
2. 在非限制性定语从句中，不能用that，而用who, whom代表人，用which或as代表事物。关系代词作定语时用whose。如：
He loved his parents deeply, both of whom are very kind to
him.
In the basket there are quite many apples, which have gone
bad.
There are forty students in our class in all, most of whom are
from big cities.限
His mother, who loves him very much, is strict with him.
China, which was founded in 1949, is becoming more and
more powerful.
限制性定语从句和非限制性定语从句有时表达的意义不同，试分析下面两个句子的差别：
His brother who is now a doctor always encourages him to
go to college.
他那当医生的哥哥常鼓励他要考上大学。（他还有其他的哥哥）
限制性定语从句与非限制性定语从句
非限制性定语从句的概念：
非限制性定语是对被修饰名词或代词的附加说明，它不是必需的，如果去掉，也不会影响句子的意思，它与被修饰名词之间通常用逗号分开。
如：The travellers, knowing about the floods, took another road. 游客们知道发了大水，都改道走了。
The boys, wanting to play football, were disappointed when it rained. 那些男孩子想踢足球，因为下雨感到失望。
非限制性定语从句用法：
1、引导非限定性定语从句时，只能用which(不用that)。
例如：Heat is another form of energy, which is as important as other kinds of energy.
热是另一种形式的能量，与其他形式的能量一样重要。 （从句表补充说明，而且关系代词which不能换成that。）
2、引导非限定性定语从句的which可以指代前面的先行词,也可以指前面整个句子的含义。
例如：That Peter will marry Alice, which has not been announced yet, has spread around.
彼特要娶爱丽斯这件事还没宣布，却已传得沸沸扬扬。（句子中的which指“彼特要娶爱丽斯”这整个句子的意思。）
3、除which外，还可用when，where，who等关系代、副词引导非限定性定语从句。
例如：After graduation, I decided to stay in Chongqing, where I spent my childhood and
four years of college life.
as在定语从句的用法
as在定语从句的用法
as 在定语从句的用法
英语是一种西日耳曼语支，最早被中世纪的英国使用，并因其广阔的殖民地而成为世界使用面积最广的语言。下面是店铺为大家整理的as 在定语从句的用法，欢迎阅读与收藏。
as 在定语从句的用法1
一、as引导定语从句与其它词连用
A．用于the same．．．as．．．结构中
This is the same sickle as I lost yesterday．这把镰刀和我昨天丢的那把一样。
We drove out of the town by the same road as we had
entered by．我们沿着进城的同一道路开车出城。
This is the same material as is used in building the bridge．这和建那座桥所用的材料一样。
注意：在这一结构中，as有时可以由that代替。例如：
I live in the same district as ／that he lives in．我和他住在同一区。
但两者亦有区别：
1．当定语从句省略谓语部分时，要用as。例如：
She uses the same scent as you（do）／that you do．她用的香水和你的一样。
This book of his is the same as yours．他的这本书和你的那本一样。
2．在容易引起歧义时，慎用as和that。例如：
This is the same knife as I lost last week．
（一般理解为：这把刀和我上周丢的那把相似。也可理解为：这是我上周丢的那把刀。）
This is the same knife that I lost last week．这是我上周丢的那把刀。 3．that在现代英语中可作关系副词，而as则不可。例如：
I live in the same district that he lives．（不可用as。）
定语从句中as的用法总结
定语从句中as的用法总结
定语从句中的as可以作为关系代词或连接词。
1.作为关系代词：
-在非限制性定语从句中，用于表示身份、职业、国籍等方面的同一性或相似性关系。
例如：She works as a teacher, as her mother does.（她像她妈妈一样，是个老师。）
-在限制性定语从句中，用于指代整个主句的内容，相当于“which”或“that”。
例如：The hotel, as I mentioned earlier, is located in
the city center.（就像我之前提到的，那家酒店位于市中心。）
2.作为连接词：
-表示原因或理由，相当于“because”、“since”或“for”。 例如：He couldn't come to the party, as he was busy with
work.（他因为工作忙，所以不能来参加派对。）
-表示方式或方式，相当于“in the way that”或“as if”。
例如：He did the work as instructed.（他按照要求完成了工作。）
-表示“正如……一样”，相当于“just as”。
例如：As many people say, laughter is the best medicine.（就像很多人说的那样，笑是最好的药。）
另外，形容词、副词或介词短语也可以用as来引导定语从句：
-形容词：such as、same as等（表示“像……这样的”）
例如：He likes fruits such as apples and oranges.（他喜欢诸如苹果和橙子之类的水果。）
-副词：as soon as、as far as等（表示“尽早”、“就……来说”） 例如：I will let you know as soon as I receive the
package.（我一收到包裹就通知你。）
as与which引导定语从句的用法辨析
as与which引导定语从句的用法辨析
一、as和which都能引导的定语从句
当非限定性定语从句置于句末时，as和which都可用来引导这个定语从句。但含义有区别。1、Dorothy
was always speaking highly of her role in the play, _______ , of course, made the others
unhappy.
A. who B. Which C. this D. what
2、The number of senior high school students is increasing, _______ is mentioned above
A. that B. it C. such D. as
二、which与as引导非限制性定语从句的区别：
1．Which只能放在主句后面，而as引导的从句位置相对较灵活，可在前，可在中，也可在后。例如：
A) As he realized, I was very useful to him.(在前)
B) Air, as we know, is a gas.（在中）
C) He was a foreigner,as I know from his accent.(在后)
2.在which引导的定语从句中，谓语动词若是am, is, are则这些系动词不能省略；而as后面若是这种情况，则可以省略。例如：
A) He is a teacher, as (is) clear from his manner.(is可以省略)
B) He said he had never seen her before, which was not true.(was不可
As we know(众所周知) ；As has been said above/before（正如前文所述） ；As has been
as的非限制性定语从句引导词用法例
路漫漫其修远兮，吾将上下而求索 - 百度文库
1 As 的用法例
1. the same… as；such…as 中的as 是一种固定结构, 和……一样……。
I have got into the same trouble as he (has).
2. as可引导非限制性从句，常带有'正如'。
例1.As we know, smoking is harmful to one's health.
例2.As is known, smoking is harmful to one's health.
As是关系代词。例1中的as作know的宾语；
例2中，它充当从句的主语，谓语动词know要用被动式。
一、“as / which” 特殊定语从句的先行成分
1. 形容词或形容词短语作先行成分, 具有形容词意义的介词短语也可以充当先行成分，如：
My grandmother’s house was always of great importance to me, as my
own is.
在一定的语言环境里，有些名词可以具有形容词的性质。这些名词主要是那些表示人的身份、职业、状态的名词。值得一提的是，在这些具有形容词性质的名词之后，引导定语从句的关系代词不能用who
/ whom.
2. 动词短语先行成分。
这种动词短语既可是限定形式也可是非限定形式。如果是动态动词短语，它们在从句中就一般有限定或非限定形式的替代动词do和as / 路漫漫其修远兮，吾将上下而求索 - 百度文库
2 which一起代替。do可以出现，也可以不出现，但不能用其它动词代替。
3. 句子作先行成分。
这句子可以是整个主句也可以只是主句中的一个从句。有时是连续几个句子，有时甚至可以是一个完整的故事。
二、“as/which”特殊定语从句在句中的位置
由于先行成分的构成成分不同，“as/which”特殊定语从句在句中的位置有以下几种情况：
as和which的区别和用法
as和which的区别和⽤法
我们知道as 和 which 都可⽤作关系代词来引导从句，它们两个到底有什么不同呢，这是我们经常觉得困惑的地⽅。下⾯详细讲讲它们之间的联系和区别和各⾃的⽤法。
⼀、as, which 指代整个句⼦或短语。
由as, which 引导的⾮限定性定语从句，相当于and this或and that。在很多时候，表⽰说话⼈对话语的看法或态度，此时它们的先⾏词并不是具体的某个词，⽽是整个句⼦或短语：
The Chinese government has decided to develop the west of China, which, I dare say, will benefit the people there,especially those who are still leading a poor life. 中国政府决定开发西部，我敢说，这将造福于西部的⼈民，特别是那些⾄今过着贫穷⽣活的⼈。
She has married again，which delighted us．她⼜结婚了，这使我们很⾼兴。
John said he’ d been working in the office for an hour，which was true．
The result of the experiment was very good， which we hadn’t expected．
Carol said the work would be done by October，which personally I doubt very much．
⼆、as, which ⽤在句末的时候，有些情况下可以互换使⽤。
He was late for school，as/which was usual with him．他上学迟到，这是家常便饭。
He was a foreigner，as/which I knew from his accent．他是个外国⼈，我从他的⼝⾳中得知这⼀点。