比较结构是两个并列成分的比较，请问有比较结构的句子，其句法成分怎么样剖析？如：
This car runs as fast as that one.
I believe I have made as detailed and exhaustive a study of his personality and home life as it is possible for any being to make.
I had seen as much blood as Meade has seen during last week.
Mindy likes music better than her mother does.
That is a lot more profitable than trying to improve others, and a lot less dangerous.
请问这类比较结构句是两个句子的合并吗？是作比较状语从句吗？as, than是连词吗？这类句子的成分如何剖析啊？
网友“比较结构是两个并列成分的比较”的说法是不正确的。并列成分指相等的语法结构，如二个主语，二个谓语，二个宾语等的并列。并列的结构表达同等要紧的信息。而as, than引导的比较分句为从属分句，as,than都是从属关联词，为从属标记。主句为主要信息，从句为次要信息。主句和从句不是并列关系。
网友的这类句子都是含有比较分句的主从复合句。其中as和than在引导从句的时候都在从句中充当了分句成分，因此不是连词，而是替代词（代词或副词），大家可以称其为比较代词，比较副词。
比较分句的特征之一就是省略和替代，在不影响理解的首要条件下，尽可能防止重复和主句相同的成分。为了说明从句的结构，我尽可能补全从句的省略（实质是没必要补全的）。
This car runs as fast as that one （does）. as为比较副词，从句省略了替代动词does（替代runs), as在从句中作方法状语。
I believe I have made as detailed and exhaustive a study of his personality and home life as it is possible for any being to make. as 为比较代词，在从句中作不定式to make的宾语。
I had seen as much blood as Meade has seen during last week. as为比较代词，在从句中作has seen的宾语。
Mindy likes music better than her mother does. than为比较代词，在从句中作does的宾语。
That is a lot more profitable than trying to improve others （is）, and a lot less dangerous. than为比较代词，在从句中作表语。从句省略了系词is。
