【初中英语】定语从句as和which的用法(1)
定语从句
1.非限定性定语从句——用逗号隔开
作用：提供附加而非必要的信息，只是对先行词作进一步的解释、补充或者说明。
若去掉此定语从句，整个主句的意义一样很明确，不会引起误解和歧义。
eg.Beijing，which is the capital of China,has developed into a international city.
如果定语从句修饰一个专有名词，我们一般要用逗号，也就是说要用非限制性定语从句。
因为专有名词本身的含义就很完整，不需要限制，用定语从句知识对它进行补充说明。
2.As的用法
（1）as在引导限定性定语从句时，只是在一些固定的结构中，即只能用在such,the same, as ,so 的后面。
eg.he is not the same as we knew.
（2）as引导非限定性定语从句可位于句首，而which不能这么用。
eg.As is known, the whale is not fish but a mammal.（as指的是 the whale is not a fish but a mammal.）
总所周知，鲸不是鱼类，而是哺乳类动物。
（3）as和which都可以引导非限定性定语从句，代替前面的整个句子。
eg.he married her, as/which was natural.
但因为as引导的定语从句有“正好...”,“就像...”,“由...而知”的含义。
所以，当主句和从句内容上一致时，或者说从句内容是顺着主句意思说下来时，用as。
若主句和从句内容上下不一致时，或从句内容对主句的内容起反对、排斥、否定等消极作用时，多用which。
eg. She has married again, as was expected.
She has married again, which was unexpected.。
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.ItB.AsC.ThatD.Which答案：B_______ is mentioned above,the number of the students in senior highschools is increasing.A.WhichB.AsC.ThatD.It答案：BAir,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。
as, which 非限定性定语从句的用法
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. itB. thatC. whichD. 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. whatB. whichC. thatD. 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. thatB. whichC. asD. 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.。
as和which引导定语从句的区别
as和which引导定语从句的区别as和which引导定语从句的区别导语：As 和which都可以引导非限定性定语从句，在用法上有一些区别。
欢迎阅读！1.as 和which都可以在定语从句中作主语，宾语，既可修饰一个词也可修饰前面的整个句子。
A.She accepted his proposal, as(which)was natural.她接受了她的求婚，这是自然而然的。
B.The boy is pretty handsome, as(which)we can see in our classroom.这个男孩非常的帅气，正如我们在教室看到。
2.as 在非限定性定语从句中的使用2.1 as可以放在主句之前，主句之后，也可以放在句中，可以说位置很灵活。
但是which常用在主句之后A.As we know,technology just like a engine to push the development of economics.众所周知，技术就像是引擎推动着经济的'发展。
B.The diva,as you know, is famous throughoutthe world.这个女歌剧演唱家，正如你知道的，在全世界都出名。
C.He has stood her up, which I don`t believe.他没有赴约，这事我不相信。
2.2 as与the same，such 连用时，用as。
A.This is the same phone as I have borrowed from my sister.这个手机和我向我姐姐借的一样。
B.I have never had such a chance to make a speech as I always imagined.我从没有这样一个机会去演讲，正如我一直想象的那样。
2.3在从句中谓语动词为被动语态，缺少主语时用as，不用which。
关系代词as和which
关系代词as和which在非限制性定语从句中，as和which可代替整个主句，相当于and this或and that。
二者的区别主要在于：(1) as引导的非限制性定语从句既可以在主句前，也可以在主句后，有时还可以插入句中，常带有“正如……，正像……”的意思。
而which引导的非限制性定语从句只能放在主句之后，翻译成“这”，如：(17)。
(2) 主句中出现the same, as, such, so修饰先行词，需选择as做关系代词在定语从句中作主语或宾语，如：(17)As we know, smoking is harmful to one's health.(18)This house is not such as I expect.(such为代词，作先行词；as在从句中作宾语)s, 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。
例如：As we know, smoking is harmful to one\'s health. 如我们所知，吸烟有害健康。
The sun heats the earth, which is very important to us. 太阳使地球暖起来，这对我们人类很重要。
典型例题1）Alice received an invitation from her boss, ___came as a surprise.A. itB. thatC. whichD. 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. whatB. whichC. thatD. it答案B。
As及which引导非限制性定语从句
As及which引导非限制性定语从句1(4)As和which引非限制性定从句1．As和which都可以在定从句中做主也许，代表前面整个句子。
Hemarriedher，as/whichwasnatural.Hewashonest，as/whichwecansee.as引非限制性定从句，可放在主句从前，也许主句此后，甚至可以切割一个主句；which引的非限制性定从句只能放在主句此后。
别的，as有“正如⋯⋯，正像⋯⋯”的意思(1)Asisknown toall，Chinaisadevelopingcountry. Heisfromthesouth，aswecanseefromhisaccent.John，asyouknow，isafamouswriter. HehasbeentoParismorethanseveraltimes，whichIdon’tbelieve.注意：当主句和从句存在上的因果关系，常用which Tomwasalwayslateforschool，whichmadehisteacherangry.3.当先行受such，thesame修，常用as Ihaveneverheardsuchastoryashetells. Heisnotsuchafoolashelooks. ThisisthesamebookasIlostlastweek.注意：当先行次由thesame修，偶也用that引定从句，但是和由as所引的定从句意思不同样SheworethesamedressthatsheworeatMary’swedding.她穿着她在MARY婚礼上穿的一条裙子。
Sheworethesamedressasheryoungsisterwore.她穿着和她妹妹所穿的一的裙子。
最新as与which引导的定语从句区别-(1)课件ppt
which he paid nearly ten thousand yuan. 他有一台新电脑，这台电脑花 了他将近一万元。
(6) 当关系代词代替主句中的宾语从句 或复合结构(如：宾+补；不定式短语； 动词-ing形式短语等) 时，一般只能用 which, 而不用 as。如：
as与which引导的定语从 句区别-(1)
一.as和which的相同点
(1)as和which都可引导非限制性定语 从句，放在主句之后；在非限制性 定语从句中充当从句的主语、宾语 或表语。如：
Tom has found a good job, as / which we all hope. 汤姆找到了一 件好工作，这正是我们大家所希望 的。
He has succeeded in his career, as / which we all hope. 他在事业中成 功了，这正是我们大家所希望的。
Her grandma died last week, which made her very sad. 她的奶奶 逝世了，这使得她很悲伤。
(5) 当非限制性定语从句的引导词前面 有介词时，只能用which, 而不可用 as。 如：
親屬
甲的女兒嫁給乙的兒子為妻，甲乙之間有無姻親 關係？
甲（女）
結婚
乙（子）
問題：甲乙之間有姻親關係嗎？
血親之配偶之血親，非姻親範圍 故甲乙之間（兒女親家）無姻親關係
親屬
親屬之親系 ➢血親親系 1.直系血親：己身所從出或從己身所出之血親 ＊己身所從出：父母祖父母（直系血親尊親屬） ＊從己身所出：子女孫子女（直系血親卑親屬） 2.旁系血親 非直系血親，而與己身出於同源之血親 如：叔公伯公、叔叔伯伯、兄弟姊妹、姪子女
as 和which 引导定语从句的异同
as 和which 引导定语从句的区别一、相同点：两者引导非限制性定语从句时，可指代主句中的部分或整个句子的内容，在从句中做主语，宾语或表语，位于主句之后有时可互换。
The meeting was put off, as /which was exactly what we wanted.He was a doctor, as/which I knew from his manner.注：which 代表整个句子，还可用于in which case, at which point, on which occasion等。
I may have to work late, in which case I’ll telephone you.我可能得晚点下班，那样我会给你打电话的。
The machine may be out of order, in which case it will be repaired at once.Ten years of hard work changed her greatly, for which reason he could hardly recognize her at first sight.二、不同点：1. 在限制性定语从句中，当先行词被the same, such ,as ,so修饰时，要用as代替who，whom，which 或者that引导定语从句。
Such men as heard him were deeply moved.听过他说话的人，都会深受感动。
（as在定语从句中作heard的主语）I've never heard such stories as he tells.我从未听过像他讲的这样的故事。
（as在定语从句中作tell的宾语）He lifted so heavy a stone as no one else can lift.他搬起别人都搬不起的大石头。
as和which引导的定语从句的用讲解
1.as引导定语从句的用法关系代词即可以引导限定性定语从句，也可以引导非限定性从句，as在从句中做主语，并与或表语。
1)Such +名词+as… (像…一样…/像…之类)The same +名词+as (和…同样的)These houses are sold at such a low price as people expected.(as作宾语)He is not the same man as he was. (作表语)We have found the same materials as are used in their factory. (做主语)2)Such …as引导的定语从句与such…that引导的状语从句的区别He is such a naughty boy as everyone dislikes.He is such a naughty boy that everyone dislikes him.3)结构such as中such作代词，意为“这样的人或事”，as在从句中做成分，修饰先行词。
This book is not such as I expect. (这不是我想要的书)He is such as you can’t rely on.2.As和which引导定语从句的区别1）as的用法：①在从句中通常做主语代指整个主句，②表示的意思是正如，正像③其引导的定语从句即可以放在主句之前也可以放在主句之后。
As we expect, we won the game.（正如我们预料的一样，我们赢了）。
The Pacific is the largest ocean, as we all know.The earth is round, as we all know.（正如我们所知到的一样地球是圆的）As is known to all, he is the best student in our class.2）which的用法：①关系代词，在从句中做主语或宾语，代指人或事。
as与which的区别
注意区别：
the same...as 相同物体 the same...that 同一物体 She wore the same dress as her younger sister wore. She wore the same dress that she wore at Mary's wedding.
Kate was late for school , as语义与主句一致, which无此限制
She has married again, which/as was expected. She has married again, which was unexpected.
一、as和which引导非限定性定语从句的区别
1、从句位置不同 as : 句首、中、后 which ：主句或先行词之后，不位于句首
1) She told me she won the match , which was a lie. 2)As is known to all, fish can’t live without water. 3)Air, as we know, is gas. 4)He was a doctor, as I knew from his manner.
as 有正如….那样的意思。
（2013, 山东）You’ll find taxis waiting at the bus station ＿＿ you can hire to reach your host family.
A.which B.where C.when D. as 句意：你会发现出租车在车站等候，你可以租一辆到你 的寄宿家庭。本题考查限制性定语从句
as 引导限定性定语从句，先行词的前面常有the same, such ,as ,so修饰
As 与 which 用法区别
As 与which 用法区别㈠关系代词as 引导的定语从句关系代词as 既可以引导限制性定语从句，也可以引导非限制性定语从句，as 在从句中作主语、宾语或表语。
引导限制性定语从句常用下列句式：1.such ﹢名词﹢as …像……一样的，像……之类the same ﹢名词﹢as…和……一样的其中AS 在从句中充当主语宾语或表语。
如：We have found such materials as are used in their factoryHe is not the same man as he wasHe has such a book as I haveHe has the same book as I have2.注意such as 引导的定语从句与such that 引导的状语从句的区别：He is such a clever boy as everyone likes 定语从句He is such a clever boy that everyone likes him 状语从句as 的用法总结例1. the same…as；such…as 中的as 是一种固定结构, 和……一样……。
例如：I have got into the same trouble as he （has）. 我碰到了跟他一样的麻烦。
例2. as可引导非限制性从句，常带有\'正如\'。
例如：As we know, smoking is harmful to one\'s health. 如我们所知，吸烟有害健康。
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。
㈡as 与which 区别关系代词as和which在非限制性定语从句中，as和which可代替整个主句，二者的区别主要在于：(1) as引导的非限制性定语从句既可以在主句前，也可以在主句后，有时还可以插入句中，常带有“正如……，正像……”的意思。