as much as和as more as

因为在这句中,much 不是修饰earthquakes的,而是修饰worry的,worry 是动词词,要用much 修饰,副词词也是；而修饰名词是用as many as,如：The little boy wanted as many candies as his sister.(小男孩儿想要跟他姐姐一样多的糖果） .不存在as more as 的用法.
earthquakes的复数已经通过句尾的do 反映出来了.
意思是：they(没有上下文,不知道指什么）也是让人担心的,但不如地震那么令人担心.
全句是：they probably donot worry people as much as earthquakes worry people.
省略句为：they probably do nont worry people as much as earthquakes do.
再问： as much as修饰不可数名词 as many as修饰可数名词 是不是啊？？？
再答： 对，much修饰不可数名词，many修饰可数名词。