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關(guān)系代詞 as與which的用法區(qū)別

1. 引導(dǎo)限制性定語(yǔ)從句時(shí)，在such, as, the same后只能用as，其他情況用which。如：

I never heard such stories as he tells. 我從未聽(tīng)過(guò)他講那樣的故事。(不可用which)

It’s the same story as I heard from her yesterday. 這故事跟我昨天從她那兒聽(tīng)到的一樣。(不可用which) 

2. 引導(dǎo)非限制性定語(yǔ)從句時(shí)，有時(shí)兩者可互換。如：

I live a long way from work, as [which] you know. 我住得離工作單位很遠(yuǎn)，這你是知道的。

但在，在以下情況引導(dǎo)非限制性定語(yǔ)從句時(shí)，兩者不可換用：

①當(dāng)從句位于主句前面時(shí)，只用as。如：

As you will find out, I will never let you down. 你將會(huì)發(fā)現(xiàn)，我決不會(huì)讓你失望。

As is known to everybody, the moon travels round the earth once every month. 月球每月繞地球轉(zhuǎn)一周，這是每個(gè)人都清楚的。

②as引導(dǎo)的非限制性定語(yǔ)從句應(yīng)與主句在意義上和諧一致，而which則無(wú)此限制。如：

She married him, as [which] was natural. 她嫁給了他，那是自然的事。

She married him, which was disgraceful. 她嫁給了他，那是很丟人的。(不用as)

③as引導(dǎo)非限制性定語(yǔ)從句時(shí)，先行詞通常不能是主句中某個(gè)具體的詞，而應(yīng)是整個(gè)句子、整個(gè)短語(yǔ)或某個(gè)短語(yǔ)推斷出來(lái)的概念，而which則無(wú)此限制。如：

I once lived in Guangzhou, which is the largest city in south China. 我曾住在廣州，那是中國(guó)南方最大的城市。(不用as)

④當(dāng)as引導(dǎo)非限制性定語(yǔ)從句作主語(yǔ)時(shí)，其謂語(yǔ)通常應(yīng)是連系動(dòng)詞，而不宜是其他動(dòng)詞，而which則無(wú)此限制。如(www.52ysedu.com)：

She has married again, as [which] seemed natural. 她又結(jié)婚了，這似乎很正常。

She has married again, which delighted us. 她又結(jié)婚了，這使我們很高興。(不用as)