Question

帮忙分析一下这句英语的结构

An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and responded to by producers.

Answer 1

an important factor in a market-oritned economy (主语） / is （谓语） / the mechanism （宾语），后面是宾补吧
by which (这里的which 指代 the mechanism)
consumer demands can be expressed and responded to by producers
expressed 和 responded to by producers

不好意思，我不知到这些语法术语，但是这样理解是没错的。

Answer 2

首先提取一下这个句子的主干
主语 an important factor
谓语（系动词） is
表语 mechanism
in a market-oriented economy 介词短语 修饰factor
mechanism 后面是一个定语从句 修饰 mechanism
如有进一步问题 欢迎补充

Answer 3

an important factor in a market-oritned economy 主语
谓语（系动词） is
表语 mechanism
in a market-oriented economy 介词短语 修饰factor
mechanism 后面是一个定语从句 修饰 mechanism