Tony always plays CDs much ____（loud） than his brother does中为什么是用louder而不是用loudlier
问题描述：
Tony always plays CDs much ____（loud） than his brother does中为什么是用louder而不是用loudlier
答
loud本身也是副词,比较级是louder,loudly是副词,比较级是more loudly,