比较分句:由从属关联词as/than引导的具有比较意义的分句。(之所以用从属关联词这个术语,是为了避免as/than是从属连词还是代词/副词的争议。)比较分句可以作形容词或副词的补足语、作句子或句子一部分的补充语、作方式状语、或作名词的修饰语等。
主句,as we know. (补充语)
She is beautiful, as is her sister. (补充语)
She is as beartiful as her sister is. (形容词的补足语)
This is the same bag as I lost yesterday. (形容词的补足语)
She runs as fast as I do. (副词的补足语)
Do as I said. (方式状语)
Life as we know it needs water and air to survive. (名词的限制性修饰语)
传统语法对以上as分句有不同的分析。
名词性关系分句:由融合型关系代词/关系副词引导的名词性从句。
This is what I bought yesterday.
Whoever said that was lying.
This is where I was born.
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