And his shoes, for all their expensiveness were, from an English point of view, distinctly regrettable.

而他的鞋子， 尽管价格昂贵， 但从英国人的角度来看， 显然令人遗憾。

So we actually use an adverb to describe to tell us the degree or amount of expensiveness.

所以我们其实是用一个副词来形容来告诉我们贵的程度或者多少。