AS在定语从句中的用法

[定语从句还真有些复杂谁给我规律性的总结]一、宾语从句的定义：宾语从句顾名思义就是在复合句中用作宾语的从句叫做宾语从句。即作及物动词、介词或某些形容词宾语的部分是由句子来充当。二、引导宾语从句的引导词分...+阅读

AS在定语从句中的用法

1. 引导限制性定语从句和非限制性定语从句

（1）as多与such 或the same连用，可以代替先行词是人或物的名词。

（2）as 也可单独使用，引导非限制性定语从句，作用相当于which。例如： The elephant's nose is like a snake, as anybody can see. (3)the same… that与 the same …as在意思上是不同的。 2.As引导的非限制性定语从句的位置 as引导的非限制性定语从句位置较灵活，可以位于主句前面.中间或后面，一般用逗号与主句隔开，但which所引导的非限制性定语从句只能放在主句之后。例如：

（1） As is expected, the England team won the football match. (2) The earth runs around the sun, as is known by everyone. 希望对你有用啊！

英语定语从句中as

As的用法：你所不能理解的那句话在下面也有详细的解释（见【】中），即是叙述了as与which的用法区别，也有例子，只不过叙述不同

一、as引导限制性定语从句主要结构有：the same…as as…as such…as so…as 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做主语或宾语。 1. It's the same person as we wanted to find yesterday .我们昨天要找的是同一个人。2. Such girls as he knows are good at English .他所认识的女孩都擅长英语。3. Do you have such books as we like ？你有我们喜欢那种书吗？4. She will marry as healthy a man as she can find .她将嫁给她能找到的任何一个有钱人。5. There is so warm a house as we want to live in .这里有如此暖和的房子，我们都想住在里面。6. He has so difficult a problem , as none of us can solve .他有如此难的一个问题，我们没有人能解决。

二、引导非限制性定语从句 ⑴ as引导非限制性定语从句，指代整个主句内容，从句可置于句首，句中或句尾1. As everyone knows ,China is a beautiful country with a long history .每个人都知道，中国是一个有着悠久历史的美丽国家。2. The earth , as we know , moves round the sun .地球，我们都知道，围着太阳转。3. Tom works hard and is willing to help others, as we all know.汤母工作努力，并且乐于助人，这一点我们都知道。⑵ 非限制性定语从句中的谓语为被动式时，常用as做主语 be said/known/announced/reported/mentioned/expected/discussed1. Grammar , as has been said before, is not a set of dead rules.语法，就像以前所说，不是一套死规则。2. As is known to all , TaiWan is part of China .⑶ as引导非限制性定语从句，有“如，似，正像”的含义，因此，下列句式多用as as has been said above 如上所说 as anybody can see 正像每个人所看到的那样 as we had expected 正如我们所预料的那样1. Things are not always as they appear.事情并不一直像他们表面那样。2. The boy has as much progress as we had expected.正像我们所预料的那样，这个男孩取得了大的进步。【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. 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.。】

定语从句中as的用法如何

关系代词as 引导的定语从句 as 1. as 可以在定语从句中做主语或宾语，代表前面整个句子。如： He married her, as was natural. 他跟她结婚了，这是很自然的事。 He is honest, as we can see. 他很诚实，这一点我们看得出来。 2. as 引导的非限制性定语从句可以放在主句之前、主句之后，甚至还可以分割主句。另外，as 常常有“正如、正像”的含义。如： As is known to all, China is a developing country. 众所周知，中国是发展中国家。 He is from the south, as we can know from his accent. 他是南方人，这一点我们从他的口音可以知道。 John, as you know, is a famous writer. 正如你所知，约翰是个著名作家。 1. 当先行词受such, the same 修饰时，关系词常用as。如： I've never heard such stories as he tells. 我从未听过象他讲的这样的故事。

He is not such a fool as he looks. 他可不象他看上去的那样傻。 This is the same dictionary as I lost last week. 这部词典跟我上星期丢失的一样。注意：当先行词受the same 修饰时，偶尔也用 that引导定语从句，但与as引导的定语从句意思有区别。如： She wore the same dress that she wore at Mary's wedding. 她穿着她在玛丽婚礼上穿过的同一条连衣裙。 She wore the same dress as her younger sister wore. 她穿着跟她妹妹所穿的一样的连衣裙。