关系代词as与which的用法区别_高中英语语法

关系代词as与which的用法区别

 
关系代词as">as与which">which">which">which的用法区别
 
 
■as">as 和which">which的相同点
(1) as">as 和which">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：http://yingyu.chazidian.com
Tom has">as found a good job, as">as / which">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">as 和which">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">which makes him very sad. 他母亲病了，这件事情使他很难过。
He has">as made great progress, as">as / which">which makes us very happy. 他进步了，这使得我们很高兴。
以上两句中的as">as / which">which都指前面整个句子的内容。
Though he has">as lots of money, he still rides his old bike, which">which was">as 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">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">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">which。如：
She is so nice a girl as">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">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">which替换。
(2) as">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">as 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">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">which。如：
He has">as succeeded in his career, as">as / which">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">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">which, 而不可用 as。如：
He has">as a new computer, for which">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。
 

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(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">which, 而不用 as。如：
She told us that there was">as something wrong with her bike, which">which was">as true。她告诉我们说她的单车出了毛病，这话是真的。
He asked her to help him with his English, which">which she did. 他请她教他学英语，她的确帮了。
(7)  关系代词仅代表主句中的谓语部分时，从句中谓语部分被省略而只保留情态动词的否定式或助动词否定式，引导词一般只用which">which, 而不用as。如：
He speaks English very fluently, which">which I can’t. 他的英语说得非常流利，这我可不行。
(8) 关系代词作定语修饰后面的名词时，一般只用which">which, 而不用as。如：
He suggested going swimming in the river, which">which idea we agreed with. 他提议去河里游泳，我们就同意了他的想法。
(9) 当关系代词仅代表主句中单个的名词时，一般只用which">which, 而不用as。如：
He sent me a beautiful present, which">which I valued very much. 他给寄来了一件精美的礼物，我对它非常珍视。
(10) as">as 在非限制性定语从句中，还常跟such连用。如：
There was">as a look of love in the teacher’s eyes, such as">as mothers have for their children. 老师眼里流露出对他喜爱的神情，就好像母亲对孩子的喜爱。
(11) as常用于一些固定结构中。如：
as">as is well known / as">as we all know 众所周知；             as">as is said above 正如上面所说；
as">as might be imagined 正像所想象的那样；                  as">as is reported 如报道所说；
as">as has">as been pointed 如所指出的那样；                        as">as is expected 正如所料。
 

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