Can hard work change a penson that much?怎么理解

题目

Can hard work change a penson that much?怎么理解
在一本语法书上看到“Can hard work change a penson that much?”虽讲的a 的泛指问题,但这句子还是不会理解过来,
hard work change a penson是“努力着改变一个人”的意思吗?
还有后面还有个that much,这又怎么理解呀?

答案

Can hard work change a person that much? 勤奋工作能让人有这么大的变化?
that much 这么大, 如此多