2020北京高中士兵考军校-英语知识点汇总（三十六）

　　●as & which：

　　as & which 引导非限制性定语从句的区别：

　　①位置的不同：

　　which 引导的定语从句只置于所限制的 句子后；as 位置较灵活，也就是说as可置于所限制的句子前面；插在句子中或放在句子后。如：

　　1. He was late again， which made his teacher very angry.

　　2. Jack， as you know， is an honest man. 或Jack is an honest man ， as you know.

　　或As you know， Jack is an honest man.

　　②先行词的不同：

　　as引导非限制性定语从句时，其先行词多为一个句子；

　　which引导非限制性定语从句时，其先行词可以是一个词，一个短语或一个句子。

　　He was proud， which his brother never was. （先行词是一个词）

　　She was very patient towards the children， which her husband seldom was.

　　He was proud， which I dislike very much.（先行词是一个句子）

　　He is an honest man， as is known to all.

　　He was a foreigner， as I know from his accent.

　　③as 一般译为“正如”“就像”，“这一点”

　　as we all know；as you know; as is known to all; as you see; as we can see; as has been expected; as we have imagined.