这话怎么翻译,分号起什么作用?

题目

这话怎么翻译,分号起什么作用?
After the fire it had become apparent just how much remained of the structure with its splendidly decorated interiors;(分号) to have pulled the house down, as one commentator suggestedm would have been vandalism.
remained 是什么词, 名词? 还是形容词?形容词的话,为什么这样能用,能举个其他的例子吗.
为什么用had become.而不是用过去式became
to have pulled the house down,跟分号的句子有关系吗? 为什么用to?

答案

remained是动词的过去式,不是名词也不是形容词 how much remained是“剩余多少”