as, which 非限定性定语从句的用法
——文章来源网，仅供分享学习参考 1 as, which 非限定性定语从句的用法
以下是小编给大家整理的as, which 非限定性定语从句的用法，希望可以帮到大家
由as, which 引导的非限定性定语从句，as和which可代整个主句，相当于and this或and that。As一般放在句首，which在句中。
As we know, smoking is harmful to one's health.
The sun heats the earth, which is very important to us.
典型例题
1)Alice received an invitation from her boss, ___came as a surprise.
A. it B. that C. which D. he
答案C. 此为非限定性从句，不能用 that修饰，而用which.，it 和he 都使后句成为句子，两个独立的句子不能单以逗号连接。况且选he句意不通。
2)The weather turned out to be very good, ___ was more than we could
expect.
A. what B. which C. that D. it
答案B。which可代替句子，用于非限定性定语从句，而what不可。That 不能用于非限定性定语从句，it不为连词，使由逗号连接的两个句子并在一起在英语语法上行不通。
3)It rained hard yesterday, ____ prevented me from going to the park..
A. that B. which C. as D. it
答案B.
as 和which在引导非限制性定语从句时，这两个关系代词都指主句所表达的整个意思，且在定语从句中都可以作主语和宾语。但不同之处主要有两点：
(1) as 引导的定语从句可置于句首，而which不可。
(2) as 代表前面的整个主句并在从句中作主语时，从句中的谓语必须是系动词;若为行为动词，则从句中的关系代词只能用which.。
在本题中，prevent由于是行为动词，所以正确选项应为B。 ——文章来源网，仅供分享学习参考 2 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).
例2. as可引导非限制性从句，常带有'正如'。
As we know, smoking is harmful to one's health.
As is know, 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。
as的非限制性定语从句
导语：以下是店铺精⼼为⼤家整理的有关as的⾮限制性定语从句的⽰例，希望对⼤家有所帮助，欢迎阅读。
⾮限制性定语从句：
即⾮限定性定语从句，起补充说明作⽤，缺少也不会影响全句的理解，在⾮限定性定语从句的前⾯往往有逗号隔开，如若将⾮限定性定语从句放在句⼦中间，其前后都需要⽤逗号隔开。由as, which 引导的⾮限定性定语从句，as和which可代整个主句，相当于and this或and that。As⼀般放在句⾸，which在句中。
as引导的⾮限制性定语从句
as引出⾮限定性定语从句时，代替整个主句，对其进⾏说明但通常⽤于像as we all know, as it is known, as is known toall, as it is, as is said above, as always mentioned above, as is usual, as is often the case, as is reported in the newspaper等句式中。as在⾮限定性定语从句中作主语、表语或宾语，且引出的'从句位置⽐较灵活，可位于句⾸或句末，也可置于主句中间。通常均由逗号将其与主句隔开。as有“正如……，就像……”之意。
如：As is known to the United States, Mark Twain is a great American writer.
美国⼈都知道，马克·吐温是⼀位伟⼤的美国作家。
（as在从句中作主语）
He is absorbed in work, as he often was.
他正在全神贯注地⼯作，他过去经常这样。
（as在从句中作表语）
As we all know, the earth is round.
众所周知，地球是圆的。
（as在从句中作宾语）
使⽤规则及注意事项：
1、which引导的⾮限定性定语从句是⽤来说明前⾯整个句⼦的情况或主句的某⼀部分。
As引导的定语从句(含配套练习与答案)
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源-于-网-络-收-集 as与which引导定语从句的用法辨析
定语从句是高一英语的主要语法项目之一，也是高考英语的常考知识点，尤其是as和which引导的定语从句，更是历年高考试题中的考点和热点。as和which都能引导定语从句，那么它们的共同点和区别是什么呢?
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。例如：
Dorothy was always speaking highly of her role in the play, _______ , of course, made
the others unhappy. (NMET2000)
A. who B. which C. this D. what
【简析】答案是B。which引导非限定性定语从句，指代前面主句的内容，定语从句部分意为：这当然使别人不高兴。这里不能换用as作引导词，因为我们不能说“正如使别人不高兴”。
The number of senior high school students is increasing, _______ is mentioned
above.
A. that B. it C. such D. as
【简析】答案是D。as引导非限定性定语从句，意思是“正如”。此时也可以换用which引导，但意思有别，意为：这一点上面提到了。
二、只能用which引导的定语从句
1. 在限定性定语从句中。例如：
The project _______ a British businessman has invested in is under construction at
present.
A. which B. as C. what D. why
Which+as+引导非限制定语从句的异同点+
Which/ as 引导非限制定语从句的异同点
1相同点
(1) which/as在非限制定语从句中作主语时，且谓语为系表结构时，二者可互换
eg:He didn’t go to school yesterday, which / as was strange.
(2) which/ as 在非限制定语从句中做宾语时，二者可互换
eg:This elephant is like a snake, as/ which anyone can see.
Peter studies hard, as/ which we all know.
(3)which/ as在非限制定语从句中作表语时（此时as/which代表的是主句的表语）
eg:These ideas seem strange, as/which in fact they are.
The meeting is very important to us, as/ which indeed it is.
2 which / as的不同点
（1） as引导的非限制定语从句可以放在句首，句中和句尾，而 which引导的非限制定语从句通常放在句末，不能放在句首。
eg:As we all know, getting up early is very helpful.
As everyone knows, the population of China is the largest in the world.
If you go along the street to the end, as I tell you to do, you’ll find the hospital.
(3) 当非限制定语从句中谓语是 say, know, imagine, expect, show, point, report, announce, suppose 以及这些动词的被动式时，用as。常见的结构有
高中英语定语从句：As 和which 引导定语从句精讲精练
高中英语定语从句：As 和which 引导定语从句精讲精练
1 / 4 关系代词as和which 引导的定语从句
as和which引导非限制性定语从句，有相同之处也有不同之处。具体情况是：
1. As和which都可以在定语从句中做主语或者宾语，代表前面整个句子。
He was honest, as/which we can see.
as 引导非限制性定语从句，可放在主句之前，或者主句之后，甚至可以切割一个主句；which引导的非限制性定语从句只能放在主句之后。另外，as有“正如……，正像……”的意思
which 指代整个句子不可置于句首只能位于主句后。
1. They didn’t come to school on time, which made the teacher angry.
2. The sports meeting was put off, which astonished (吃惊）us greatly.
3. His father died last year, which made it impossible for him to go to school.
4. He didn’t pass the exam, which disappointed his parents.
as 引导定语从句，位置灵活，可位于句首、句中和句末。
As we all know, China is a developing country.
The number of the visitors, as we had expected, was over 200.
China is a great country with a long history, as is known to all.
注意:当主句和从句存在逻辑上的因果关系时,主句与从句有因果或并列，从句谓语动词是“系动词+adj" 使用 which
非限制性定语从句及As 的用法例
非限定性定语从句
非限定性定语从句的作用是对所修饰的成分作进一步说明，通常是引导词和先行词之间用逗号隔开，将从句拿掉后其他部分仍可成立
1. which引导的非限定性定语从句来说明前面整个句子的情况或主句的某一部分
2.当先行词是专有名词或物主代词和指示代词所修饰时，其后的定语从句通常是非限制性的，例如：
Charles Smith, who was my former teacher, retired last year. 查理·史密斯去年退休了，他曾经是我的老师。
My house, which I bought last year, has got a lovely garden. 我去年买的的那幢房子带着个漂亮的花园。
This novel, which I have read three times, is very touching. 这本小说很动人，我已经读了三遍。
3.非限制性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数，例如：
He seems not to have grasped what I meant, which greatly upsets me. 他似乎没抓住我的意思，这使我心烦。
Liquid water changes to vapor, which is called evaporation. 液态水变为蒸汽，这就叫做蒸发。
4. 有时as也可用作关系代词
5. 在非限定性定语从句中，不能用关系副词why和关系代词that，而用who,
whom代表人，用which,whose代表事物，如果需要用why，
可用for which代替.；
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).
【初中英语】初中英语语法对非限定性定语从句的用法总结
【初中英语】初中英语语法对非限定性定语从句的用法总结
【—语法对非限定性定语从句的用法总结】下文为同学们介绍的是对非限定性定语从句的的分析，希望可以帮助到大家。
as, which 非限定性定语从句
由as, which 引导的非限定性定语从句，as和which可代整个主句，相当于and
this或and that。As一般放在句首，which在句中。
As we know, smoking is harmful to one's health.
The sun heats the earth, which is very important to us.
典型例题
1）Alice received an invitation from her boss, ___came as a surprise.
A. it B. that C. which D. he
答案C. 此为非限定性从句，不能用 that修饰，而用which.，it 和he 都使后句成为句子，两个独立的句子不能单以逗号连接。况且选he句意不通。
2）The weather turned out to be very good, ___ was more than we could
expect.
A. what B. which C. that D. it
答案B。which可代替句子，用于非限定性定语从句，而what不可。That 不能用于非限定性定语从句，it不为连词，使由逗号连接的两个句子并在一起在英语语法上行不通。
3）It rained hard yesterday, ____ prevented me from going to the park..
A. that B. which C. as D. it
as 和 which 引导定语从句的区别
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as 和 which 引导定语从句的区别
先看两道高考题：
1． _____ is known to all，China will be an _____ powerful country in 20 or 30years'time．
A．That；advancing B．This；advanced C．As；advanced D．It；advancing
2．He made another wonderful discovery， _____ of great importance to science．
A．which I think is B．which I think it is C．which I think it D．I think is
分析：第一题考查了 as在从句中作主语的定语从句，意为“正如”，而ad- vanced
country表示发达国家；第二题考查了which引导的非限制性定语从句，I think是插入语。这两个句子分别含有as和 which引导的定语从句，现就其用法作一说明：
一、as引导的定语从句表示说话人对话语的看法、态度、依据、解释或评论。具有下列特点：
1．as用于引导定语从句时，具有“正如„„、像„„、由„„而知”等语义。如：
He was strongly against the plan，as could be expected．（正如所料，他强烈反对这项计划。）
As he hoped he would，he saw the girl．（像他希望的那样，他见到了那个女孩。）
2．as引导的定语从句在语义上要和主句保持一致，而which可不一定，如果语义不一致，则要用which来替代as。如：
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。）
as和which引导定语从句的区别
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1 1） 关系代词在非限定性定语从句中代替主句中某一个名词或词组，并对该名词或词组进行补充或说明时，只能用which.
The book, which I bought yesterday, is very interesting.
Last night, I saw a film, which was about Long March.
2)关系词在非限定性定语从句中代表主句中谓语部分的整个概念的只能用which.
He can write a letter in English, which I can not.
I asked him to lend me his bike, which he did.
3) 关系词在非限制性定从中代表主句所表达的整个内容，并当关系词等于and this时，只能用which.
The stems of bamboo are hollow, which makes them very light.
It was raining hard, which kept us indoors.
4) 关系词在非限制性定从中代表主句所表达的整个内容,并关系词等于which fact时，只能用as
This elephant is like a snake, as anybody can see.
He came very early this morning, as was usual.
5) 关系代词所引导的非限定性定从放在主句之前时，只能用as.
As we all know, Taiwan is a part of China.
6) 非限定性定从的谓语为say, know, imagine, announce, show, report, expect, explain,