重提as...as before结构的分析
Consequently he was still as poor as before. 请问在这句话中第二个 as 是介词还是连词？如果是介词，我猜想 as before 是一个介词+副词的结构，就像 until recently、by now 等那样；如果是连词，我猜想 as before 是 as he had been before 的省略形式（语法上，如果状语从句的主语与主句一致而且状语从句谓语中有be动词，可以将状语从句的主语连同be动词一起省略）。不知道我的这些猜想对不对，应该怎样分析 as before 的结构？请老师们解答。
最佳答案 2017-10-09 15:42
Consequently he was still as poor as before.
as在这里不是介词，不能分析为介词+副词before。
as和than引导比较状语从句时，从句通常都省略和主句相同的成分。还原后的句子为：
Consequently he was still as poor as he had been before.
比较从句中的省略不同于其它状语从句的省略，不仅仅是可以省略主语和be, 凡是和主句相同的结构都可以省略。
如He runs as fast as I (do).
He has as much money as John (does).
He swims as frequently in winter as (he does) in summer.
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