【英语四级考点六:】as与which引导非限制性定语从句的区别
1.位置不同。which 引导的定语从句只置于所限制的 句子后;as引导的定语从句位置较灵活,也就是说as从句可置于所限制的句子前面、插在句子中或放在句子后。
Mike,as you know,is an honest man./Mike is an honest man,as you know./As you know,Mike is an honest man.
2.先行词不同。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。
As we all know,he is very proud.(先行词为一个句子)
He was proud,which his brother never was.(先行词是一个词)
3.意义不同。as一般译为“正如,就像”;which一般译为 “这一点,这件事”。
John,as you know,is my best friend.
正如你所知,约翰是我最好的朋友。
He has been to Paris more than ten times,which I don't believe.
他已去过巴黎十多次了,这一点我不相信。
4.关系不同。当主句和从句之间存在着逻辑上的因果关系时,关系词往往只用which。
Tom was late for school,which made his teacher very angry.
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