关系代词as与which区别详解

关系代词as与which区别详解

一、引导限制性定语从句

引导限制性定语从句时，在such, as, the same后只能用as，其他情况用 which。如：

I never heard such stories as he tells. 我从未听过他讲那样的故事。

It’s the same story as I heard yesterday. 这故事跟我昨天听到的一样。

Such wind as there was came up the fiver. 当时起的这种风沿江刮了上来。

He was in such a fury as I have never seen. 我从未见过他发这么大的火。

As many as ten people were found living in a single room. 曾发现多达十个人住在一间房里。

It is an organization which helps the elderly. 这是一个帮助老年人的机构。

He possesses qualities which ensure success at school. 他有许多品质保证他学习很成功。

二、引导非限制性定语从句

1. 互换的场合

引导非限制性定语从句时，有时两者可互换。如：

I live a long way from work, as [which] you know. 我住得离工作单位很远，这你是知道的。

He arrived early to dust the shop, as [which] was his custom. 他到车间很早，先掸尘土，这是他的习惯。

I had coffee after dinner, as [which] is my usual practice. 我饭后喝咖啡，这是我的习惯。

Sophia was not unconscious, as [which] could be judged from her eyes. 索菲娅并未失去知觉，这从她的眼睛里可以看出。

2. 不能互换的场合

在以下情况引导非限制性定语从句时，两者不可换用：

(1) 当从句位于主句之前时，只用 as。如：

As you know, next Tuesday’s meeting has been cancelled. 你知道，下周二的会议取消了。

As is known to everybody, the moon travels round the earth once every month. 月球每月绕地球转一周，这是每个人都清楚的。

(2) 当从句插在主句中间且关系代词指的是整个句子时，只用 as。如：

Freddie, as might be expected, was attending the conference. 弗雷迪在参加会议，这是可以预料到的。