解析as和 which 引导的非限定性定语从句区别

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解析as和 which 引导的非限定性定语从句区别

as和which引导非限制性定语从句的区别

在非限制定语从句中用which，as有什么区别

as和which引导非限制性定语从句的区别

一、解析as和 which 引导的非限定性定语从句区别

非限制性定语从句在句中主要起补充说明作用，缺少也不会影响全句的理解，但是，非限制性定语从句是英语学习中的一个重点，也是难点，我们必须参透用法，在写作或运用中达到运用自如，成为闪光的金句。

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，as可放在句首、句末，也可插入主句中；which在句中，即主句之后。　　As we know, smoking is harmful to one's health.

正如我们所知，吸烟有害健康。　　The sun heats the earth, which is very important to us.　　

太阳给地球带来热，这对我们非常重要。

1.which引导非限制性定语从句解析，下面通过典型例题解析更直观地说明：1）Alice received an invitation from her boss, ___came as a surprise.A. it　 B. that　 C. which　　D. as　 答案C. 此为非限定性从句，不能用 that修饰，而用which指代前面整个句子；it使后句成为句子，两个独立的句子不能单以逗号连接。as引导非限制性定语从句一般放在句首,直接排除。句意：爱丽丝收到了老板的邀请，这让她很吃惊。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。句意：结果天气非常好，这超出了我们的预期。3）It rained hard yesterday, ____ prevented me from going to the park.A. that　B. which　　C. as　 D. it　答案B.　　在本题中，prevent由于是行为动词，所以正确选项应为B。句意：昨天雨下得很大，这使我不能去公园。

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.

正如我们所知，吸烟有害健康。

As是关系代词引导非限制性定语从句位于句首。as作know的宾语；

As is known, smoking is harmful to one's health.

众所周知，吸烟有害健康。As是关系代词引导非限制性定语从句位于句首，as充当从句的主语，谓语动词known要用被动式，要用系动词连接。

总结：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。

由which和as引导的非限制性定语从句的区别：

1）位置上，as可放在句首、句末，也可插入主句中；which一般放在主句之后（有时也可用as）：

As we all know, reading is very important.

众所周知，阅读是非常重要的。

Reading is very important, which we have already known when we were very young.

阅读是非常重要的，我们很小的时候就已经知道了这一点。

（2）意义上，as有正如、按照、正像之意，一般用在肯定句中；which可用于含肯、否定意义的句子中：

He failed in the exam again, as was expected．

正如所料，他考试又不及格了。

He failed in the exam again, which was unexpected．

他考试又不及格，这是出人意料的。

（3）当定语从句所修饰的主句内容是谓语动词的对象时，常用as，如：

She finally stopped crying, as we had expected．

正如我们所料，她终于停止了哭泣。

（4）当关系代词代表主句引起的结果，又做主谓宾补（SVOC）结构中的主语时，多用which：

He passed the exam, which made him delighted．

他通过了考试，这使他很高兴。

（5）在从句中作介词宾语时，用which，如：

They went into a room, in which the murder happened.

他们走进一间发生谋杀案的房间。

（6）在从句中代表主句中的谓语的整个概念时，常用which，如：

She can both sing and dance, which I cannot．

她既会唱歌又会跳舞，而我却不会。

一、as和which引导非限制性定语从句的区别

在非限制性定语从句中as和which是经常使用的关系代词,他们都可以指代整个主句,相当于and
this或and
that,但它们还是有各自的使用规则,有所区别。一、从意义上看,as一般指代人们日常生活中都知道的常识性的东西,因而常被译成“正如”;而which代指前面主句的内容,意为“这一点”。二、从位置上看,as引导的非限制性定语从句,既可放在主句前又可置于主句后,有时还可插入主句中,而which引导的非限制性定语从句只能置于主句之后。例如:The
weather
turned
out
to
be
very
good,which
was
more
than
we
could
expect.结果天气非常好,这一点我们没有料到。

二、在非限制定语从句中用which，as有什么区别

解答:

which 和as 都可以引导非限制性定语从句，它们的先行词都可以是前面的整个句子，但在用法上有区别。它们的区别是：

1. which引导的非限制性定语从句必须置于主句之后，而as引导的非限制性定语从句可以置于句首、句中和句尾。例如：

1)She has been admitted to Beijing University, which / as is true.她考上北京大学了，这件事是真的。

2) As is known to all, China is famous for the Great Wall. 众所周知，中国以长城而闻名。

3)Taiwan, as is known to all, belongs to China. 众所周知，台湾是中国的一部分。

4) China is a developing country, as is known to all. 众所周知，中国是一个发展中国家。

2. as有“正如……，正像……”的意思，而which则没有。例如：

1）As you can see, we're still working. 如你所见，我们仍在工作。

2）There are two people who have been admitted to Shandong University , as we expected. 正如我们所预料的，有两个人考上山东大学。

3. which可以用在名词之前，而as则不可以。例如：

1）He has been absent from work for two months, in which case the boss will have to consider dismissing him. 他已经旷工两个月了，既然这样，老板将不得不考虑解雇他。

2）Mary is in hospital, for which reason she cannot go to school. 玛丽住院了，由于这个原因，她不能去上学。

三、as和which引导非限制性定语从句的区别

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
(2)
as
和which都可代表整个句子的内容或主句中的某一成分。如：
His
mother
is
ill,
which
makes
him
very
sad.
他母亲病了，这件事情使他很难过。
He
has
made
great
progress,
as
/
which
makes
us
very
happy.
他进步了，这使得我们很高兴。
以上两句中的as
/
which都指前面整个句子的内容。
Though
he
has
lots
of
money,
he
still
rides
his
old
bike,
which
was
bought
ten
years
ago.
尽管他很有钱，但是他还骑着他的旧单车，这单车是十年前买的。
There
you
can
meet
many
writers
as
you
have
ever
read
in
books.
在那里，你可见到你在书中所读过的很多作家。
as与which的区别
(1)
当先行词前面有so
+
adj.
+
a
/
such
+
(a)
+
adj.
,
the
same等词修饰时，引导词只能用as，而不用which。如：
She
is
so
nice
a
girl
as
we
all
like.
她是个我们大家都喜欢的如此好的女孩。
It
is
such
an
interesting
book
as
we
all
want
to
read.
它是本我们大家都想读的有趣的书。
上面两句中的as就不能用which替换。
(2)
as
在从句中常作宾语；作主语时，从句的谓语动词常为系动词，即：系表结构或被动结构。如：
As
you
expected,
he
turned
up
on
time.
正如你所愿，他按时到了。
As
is
said
above,
he
has
conquered
the
difficulty.
正如上面所说，他征服了困难。
(3)
当非限制性定语从句放到主句的前面时，引导词只能用as，而不用which。如：
As
is
planned,
we
got
there
before
eight.
正如计划，我们再把店前到达了那儿。
(4)
As引导的非限制性定语从句指表示积极的意义，与主句是顺理成章的关系，绝不能与之矛盾。若非限制性定语从句表示一种消极的意义，则只用which。如：
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：
He
has
a
new
computer,
for
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。