which与as引导非限制性定语从句的异同
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.
二、不同点
1. as可以放在主句前后，也可插入主句之中；而which引导的非限制性从句只能位于主句之后。
As is known to all, fish can’t live without water.
Air, as we know, is gas.
2.在非限制性从句中，which后的be动词不可省；as而后的be动词可以省略。
She told me she won the match, which was a lie.
The material is elastic, as (was) shown in the figure.
3. which在非限制性定语从句做主语时可用各类动词做谓语；而as做主语时，谓语常用系动词，如be, seem, become等，一般不用其他行为动词。
He saw the girl, which delighted him.
He didn’t say anything at the meeting , as/which seemed very strange.
4. as常用“正如”含义，常用的结构有as we know（众所周知）；as often happens（正如常发生的那样）；as is often the case（情况常常如此）; as we all can see（正如我们看到的）; be announced/expected/known/imagined/mentioned/said/shown/
reported等。这些结构常放句首，偶尔也可以放句中或句末。
As is known to all, China is a developing country.
Kate was late for school, as often happened.
5. 在非限制性定语从句中which指代主句中某一个单词时，as不可以。
My brother enjoyed playing basketball, which he really plays well.
Beijing, which he was born in, is our capital.
6. “介词+关系代词（介宾代物）”中关系代词只能用which。
The Travel Agency, with which our company has been dealing for several years, has opened for new branches.
Air is a mixture of gases, of which oxygen forms 21 percent.
7. 从句中的谓语动词是否定形式时，常用which。
He can write a letter in English, which I can not.
Metal will bear beating with a hammer, which a stone will not
8.在非限制性定语从句关系代词代表前面主句中的宾语从句时，常用which
He said he had passed the exam, which was untrue.
#高考# 导语定语从句，一个句子跟在一名词或代词（先行词）后进行修饰限定，就叫做定语从句。通俗来讲，从句在整个句子中做定语，这个从句就叫做定语从句。在主句中充当定语成分。 被修饰的词叫先行词。定语从句不同于单词作定语的情况，它通常只能放在被修饰的词（即先行词）之后。
篇一
问1：何谓定语从句？
答：修饰先行词的从句就叫定语从句。
问2：定语从句分为几种类型？
答：定语从句可分为限制性定语从句和非限制性定语从句。
问3：限制性定语从句的构成要素有哪些？
答：限制性定语从句的构成要包括先行词和关系词。
问4：什么叫先行词？
答：被定语从句修饰的名词或代词就叫先行词。
问5：什么关系词？
答：引导定语从句的词就叫关系词。
问6：关系词是如何分类的？
答：关系词可分为关系代词和关系副词。
问7：关系代词包括哪些？
答：关系代词包括that,which,who,whom,whose和as.
问8：关系副词包括哪些？
答：关系副词包括when,where和why.
篇二
问1：关系代词that和which的区别有哪些？
答：1、只要关系代词that的主要情况如下：
（1）先行词是不定代词all,anything,everything,little,much,nobody,nothing等时；
（2）先行词被不定代词any,no,all等修饰时；
（3）先行词被the last,the only,the very,just the 等修饰时；
（4）先行词被序数词修饰时；
（5）先行词被形容词级修饰时；
（6）先行词既指人又指物时；
（7）以who或whic引导的疑问句中。如：Who is the man that is standing over there?
Which is the book that you would like to take away?
答：2、只用关系代词which的情况如下：
（1）在非限制性定语从句中（定语从句前有逗号）
（2）介词后
篇三
问1：关系副词有哪些？它们分别怎么样？
答：关系副词包括表示时间的when,表示地点的where和表示原因的why.
问2：关系副词在限制性定语从句中可以转换为什么？
答：在限制性定语从句中，关系副词都可以转换为相应的介词加关系代词。
问3：关系副词why可以转换为什么？
答：关系副词why可以用for which来替换。
篇四
问1：先行词是those时，用哪个关系代词？
答：遇到先行词是those时，用关系代词who.还是先让我们来看个例子吧。
Gold help those who help themselves.
上帝帮助自强的人（自助者天助）。
问2：先行词是he时，用哪个关系代词？
答：先行词是he时，用关系代词who.我们来看两个例句。
He who doesn't reach the Great Wall is not a true man.
不到长城非好汉。
He whoinsists on seing with perfect clearness before he decides never decides.
坚持一切看清楚之后才做决定的人永远也做不了决定。
问3：关系代词whose该怎么样？
答：关系代词whose后既可以接人也可以接物。
That's the man whose house has burned down.
那就是那位房屋烧毁的人。
Have you noticed the house whose windows are closed now?
你注意到了那家窗户关着的房子了吗？
问4：定语从句中的whose+名词可以用什么替换？
答：whose+名词（人/物）
=of which/whom the +名词
=the +名词 of which/whom
注意：whose后面接单数名称还是复数名词，转换时也应写成相应的单复数
篇五
问：限制性定语从句和非限制性定语从句有哪些区别？
答：限制性定语从句和非限制性定语从句区别在于：
（1）从形式上看
主从句之间是否有逗号隔开，如果有逗号，则为非限制性定语从句
（2）从逻辑关系看
主从句之间关系松散则为非限制性定语从句
（3）从翻译角度看
先翻译定语从句为限制性定语从句；各自翻译的为非限制性定语从句
让我们来看看一些例句吧。
Those who want to go camping please tell the monitor.
想去野营的人请告诉班长。
这个例句就是典型的限制性定语从句，先行词为those,关系代词是who.
Football,which is a very interseting game,is played all over the world.
足球风靡全世界，它是一项很有趣的运动。
本句话是一个典型的非限制性定语从句，主从句关系松散。
篇六
问：介词+which/whom引导的定语从句是怎么一回事？
答：如果关系代词which/whom本身在定语从句中充当一个介词或介词短语的宾语时，有时可以将介词直接放在which/whom的前面，这样就出现了“介词+关系代词”及“名词或代词+which/whom”或“复合介词+which/whom”等的结构。
例如：
（1）I know the man to whom you talked juest now.
我认识你刚才与之说话的那个人。
（2）Life is a flower of which love is honey.
人生是朵花，爱情是花蜜。
（3）Soon they spotted a mountain,on top of which stood a temple.
不久他们发现了一座山，山顶上有座庙。
（4）It's a family of five childre,all of whom are studying music.
这一家有三个孩子，他们都在学音乐。
（5）In the box we found some apples,none of which was fit to eat.
在箱子里我们发现了一些苹果，其中没有一个能吃的。
注意：指人时，该结构关系代词必须用whom，指物时，关系代词必须用which
篇七
现在就与各位分享关系副词where修饰一些具有抽象意义的表地点的名词，如situation,point,position,system等。
让我们来看一些例句吧。
If you are ever in a situation where someone starts shooting,drop to the ground.
如果你遇到有人要射击的情况就倒在地上。
But after a few days' stay they got to the point where they could read each other's thoughts.
不过待了几天之后，他们到了一个相互理解彼此想法的阶段。
It ot to the point where I couldn't remember any of the reasons I loved him.
到那时候，我无法记起我爱他的任何理由了。
(2001年高考)
句子结构非常简单： The fllm brought the hours backto me。
“这部**把我带回到那些时光”，
哪样的时光呢?
结合后面，是指：在那个遥远的村庄里得到很好照顾的时光。
When引导的不是时间状语从句，而是定语从句，修饰先行词the hours。在这个句子中，先行词 the hours和定语从句被 back to me分隔开了，这就是分隔式定语从句。这样的句子理解起来有一定的难度。
英语句子中出现这种分隔现象的原因是主语或宾语带了过长的修饰成份。为了照顾主句结构紧凑，就常常将主语或宾语与其修饰成份隔开。现将常见的几种分隔式定语从句总结归纳如下，供教、学同鉴。
1．先行词与定语从句之间被用作定语的短语分开。如：
Do you remember one afternoon ten years ago when I came to your house and borrowed a necklace of yours?
10年前的一个下午，我来你家借了一条项链，你还记得吗?(先行词 one afternoon和定语从句被用作定语的ten years ago分隔开了)。
They still remember one afternoon in the first year when the professor took the students to the chemistry lab．
他们仍然记得一年级时教授带他们到化学实验室的那个下午(先行词 one afternoon和定语从句被用作定语的短语in the first year分隔开了)。
2．先行词与定语从句之间被用作状语的短语分开。如：
I was the only person in my office who was invited．
我是我们办公室里唯一被邀请的人(先行词 person和定语从句被用作状语的 in my office分隔开了)。
There are thousands of stars in the sky that are like our?鄄Sun.
天空中有数千个像我们的太阳一样的星星(先行词 stars和定语从句被用作状语的 in the sky分隔开了)。
She sang the songs perfectly there yesterday which was written by me.
昨天在那里她把我创作的那首歌唱得好听极了(先行词the songs和定语从句被用作状语的 perfectly there yesterday分隔开了)。
3．先行词与定语从句之间被主句谓语分隔。如：
In 1898，a law was passed which meant all people above a certain age were paid a weekly “old age pension”．
1898年，通过了一项法律，规定一定年龄以上的人都按周付给“养老金”(先行词 a law和定语从句被主句谓语 was passed分隔开了)。
The days are gone when we suffered so much． 我们受苦受难的日子过去了(先行词the days和定语从句被主句谓语 are gone分隔开了)。
The days will certainly come when the four modernizations will be realized in our country．
我们国家实现四个现代化的日子一定会到来(先行词 the days和定语从句被主句谓语 will certainly come分隔开了)。
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