she has never spent a more worrying day.more 是什么用法?

问题描述:

she has never spent a more worrying day.
more 是什么用法?

more worrying是worrying的比较级形式,more是构成多音节词比较级形式的一个要素;原句可以扩展成:
she has never spent a more worrying day (than today). 她头一次像今天这样提心吊胆.