The result of the experiment was very good,which we hadnt expected.
②在主谓宾结构的非限制性定语从句中,which 和 as 作宾语时可互换使用。
He was an Englishman,which / as I knew from his accent.
作主语时通常用 which ,而不用 as .但在主语 +be+done 结构中,as 作主语。例如:
He passed the examination,as was known.
③ as 引导非限制性定语从句时,通常用在表示肯定意义的从句中,而不能用在表示否定意义的从句中; which 则不受此限制。例如:
Mummy treats me just as a baby,which (不用 as ) I cant bear.
She married again,which (不用 as )was unexpected.
④在宾补结构的非限制性定语从句中,作主语或宾语时,宜用 which ,而不用 as .例如:
He believed in God,which (不用 as ) I find strange.
He changed his mind,which (不用 as ) made me very angry.
⑤定语从句中动词若为表示知觉的词,如 see ,expect ,say ,know 等时,用 as 而不用 which .
As we expected / know, Xiao Ming took the first place in the game.
⑥ as 引导的定语从句与 it 作形式主语的主语从句和以 what 引导的主语从句的区别。试比较:
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