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引导从句时,as 和which有哪些区别和联系?

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引导从句时,as 和which有哪些区别和联系?
She has married again,as was expected.
她已再婚,这是意料中的事。
We are tired,as anyone can see.
我们累了,这是有目共睹的。
什么时候两者能通用,什么时候不能?举些例子吧,
引导从句时,as 和which有哪些区别和联系?
当这个句子或短语做先行词时,必做成非限定性定语从句.关系代词可用which或as.注意:1.当在从句中做主语,若谓语动词是非be动词,必须使用which.其他情况,则可通用.2.当从句在主句前面时,则必用as.
he said he was a king,which(as) was a lie.做主语,谓语为be.
he said he was a king,which surprised me.做主语,谓语为非be.
he said he was a king,which(as)i didn't believe.做宾语
As we all know,he is a cheat.从句在前