as非限制性定语从句例句 as非限制性定语从句常见短语

as非限定定语从句

as非限定定语从句一

as非限制性定语从句例句 as非限制性定语从句常见短语

as非限制性定语从句例句 as非限制性定语从句常见短语

as非限制性定语从句例句 as非限制性定语从句常见短语

由as, which 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, oking is harmful to ones health.

The sun heats the earth, which is very important to us.

典型例题

1)Al received an invitation from her boss, ___came as a surprise.

A. it B. that C. which D. he

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

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, ____ prnted me from going to the park..

A. that B. which C. as D. it

B.

as 和which在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。

as非限定定语从句二

as, which 非限定性定语从句

由as, which 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, oking is harmful to one's health.

The sun heats the earth, which is very important to us.

典型例题

1）Al received an invitation from her boss, ___came as a surprise.

A. it B. that C. which D. he

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

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, ____ prnted me from going to the park..

A. that B. which C. as D. it

B.

as 和which在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 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，prnt由于是行为动词，所以正确选项应为B。

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 he got into the same trouble as he (has).

例2. as可非限制性从句，常带有'正如'。

As we know, oking is harmful to one's health.

As is know, oking 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非限定性定语从句

as比较特殊，在定语从句时被归为

关系代词，也就是说它在句中像which一样是充当成分的，但它比which又多了“像、正如”的意思，因此选as.此外，也可以说as

it

is

mentioned

above,但此时as就不再是关系代词了，句子也不再是定语从句了。

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，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 rybody 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，昨夜那里发生了大。

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 rybody,the moon trels round the earth.

A.It B.As C.That D.Which

：B

_______ is mentioned above,the number of the students in senior high schools is increasing.

A.Which B.As C.That D.It

：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 he got into the same trouble as he (has).

我遇到了与他一样的麻烦。

I've nr heard of such a moving story as he is ling.

我从未听过像他讲得那么有趣的故事。

3、which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，爱因斯坦是一位的科学家。

As is known to all,Taiwan is part of China.

众所周知，是的一部分。

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的从句在意义上不可与主语相悖，而which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，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 rybody, the moon trels round the earth once ry month.

2. The moon trels round the earth once ry month, as/which is known to rybody.

3. It is known to rybody that the moon trels round the earth once ry month.

4.What is known to rybody is that the earth trels round the earth once ry 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 he 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 come 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，我们在机场相见了。(was可省略)

as非限制性定语从句的用法

全世界人都知道，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 is.

一如往常，他专心工作。（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）

We need to go back to our hometown, as is reported in the news, the war begins.

我们必须要回国了，就像报纸说的一样，开始了。

As is said above, we must protect our earth.

就像上面说的一样，我们必须守护我们的地球。

as的非限制性定语从句

as的非限制性定语从句如下：

在非限制性定语从句也分成不同的种类，在不同情况下，该从句的使用方法也是不一样的。

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 allaknow, as it is know, as is know to all, as it is, as is said above, as always mentioned above, as is usual,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。

As it 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 forgot to bring his pen with him, as was often the case.他忘了带笔，这是常事。（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）。

Boy as he was， he was chosen king.他虽是孩子，却被选为国王。（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）。

The two brothers were satisfied with this decision，as was agreed beforehand.两兄弟对此决定都满意，这项决定在事前都已得到他们的同意。(as在从句中作主语)。

Taiwan is，as you know，an inseparable part of China.你知道，是不可分割的一部分。(as在从句中作宾语)。

非限制性定语从句

定语从句有限制性和非限制性两种。

限制性定语从句是先行词不可缺少的部分，去掉它主句意思往往不明确。

非限制性定语从句是先行词的附加说明，去掉了也不会影响主句的意思。

它与主句之间通常用逗号分开，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。

as的非限制性定语从句是什么?

在as的非限制性定语从句中，连接代词as在句子中可以作主语，宾语或表语等，可以指人或物。

其在定语从句中的位置比较灵活，即可以在句子前面，也可以在句子中间或句子末尾。

常用的结构有：

As we all known

As is well known to

As is often the case

As is said/mentioned above

As has been said before

As I told you before

As is evident

As often happens

As can be seen

As is/was expected

As we expect

As I can remember

注意：

As通常只指整个句子的内容，不表示部分内容。

As的非限制性定语从句通常指“事先可以预料的，料想到的”，表示“好”的方面。

As限制性定语从句时，常构成the same…as…；such…as…；so/as…as…等结构。在从句中既可以指人，物，也可以指整个句子。