英语句子语法结构？

Question

No period in history has had as many important changes ashave taken place in the past century. 

Answer 1

No period in history主语 has had谓语 as many important changes as have taken place in the past century宾语.
历史上没有任何时期像上个世纪发生的那样多的重要变化。

Answer 2

no period in history是主语，has had是谓语，important changes是宾语。
as...as中，第一个as是副词，第二个是连词。as many是状语，as have taken place in the past century同样是状语。追问

后面一个as引导的不是定语从句吗

追答

不好意思！连词as引导的句子是定语从句，相当于一个形容词，修饰changes。

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