Some of these expressions are commonly used for many years
问题描述:
Some of these expressions are commonly used for many years
commonly 为什么不用common呢?前面不是are吗?这里不是应该用形容词吗?
答
因为这里的commonly是修饰后面的use的,这里是副词修饰动词
be used for 固定搭配,.是用来.的