Today,many polluted rivers are getting cleaner and cleaner.
问题描述：
Today,many polluted rivers are getting cleaner and cleaner.
今天许多污染了的河流变得越来越干净.
polluted是动词还是形容词啊?
many能修饰动词吗?
clean后面为什么要加er啊?
答
polluted 是形容词
many 修饰的是名词RIVERS
clean-ER是比较级 ,表明河流变得越来越干净