我猜你问了两个问题
引述《howisfashion (台北赵默笙)》之铭言：
: 请问一下..
: 我想表达(意涵)"(非特定)流行是如何形成的"?
: 是不是how is fashion?! 还是"fashion"前仍要加"the"?!
其实有个词组
Come into fashion = to become stylish or fashionable
所以依您的问题，如果要写出疑问句，或许可以写成：
How is this _____ come into fashion?
How this ____ become stylish ?
: 上电子字典查了两个例句:
您 4不4要问 as ... as...的用法
为您查询到了这个解说
我觉得还蛮清楚的
https://cambridgetaipei.pixnet.net/blog/post/222559349-【英语文法小教室】as...
as-的比较用法四大归
: as rich as Alexander (此时"as"为 adv.)
: He has earned as much money as I have.(此时"as"为pron.，why?!)
这应该是 He has earned as much money as I do( =earn money). 吧？
: 我是不是可以说 as crazy as your possible，
: (那么此时的as又是什么词性ㄋ?!)
as .... as .... 前面的as 为“副词”， 后面的是附属连接词 + 主词 + be动词/助动
词
所以这句应该是 as crazy as you are
你可以想成是两句子的合并
you are crazy.
he is crazy as well.
- he is as (副词） + crazy + as （附属连接词）+ you are.
as + 形容词 / 副词 as possible. 是另一个词组
表达“尽可能地......”
可以参考这一篇的说明
https://jim652012.pixnet.net/blog/post/18094112
希望有解答到你的疑问