一般形容词的比较级是在后面加er,harder,easier...
若形容词音节是三个或三个以上就在前面加上more比较级,more beautiful,more difficult...
much是用来修饰形容词比较级的,加深程度,表示“...得多”
This problem is harder than that one.
这道题比那道题更难.
This problem is much harder than that one.
这道题比那道题难得多.
She is much more beautiful than her mother.
more beautiful是beautiful的比较级,much在前面修饰比较级
她比她妈妈要漂亮得多.
也就是说比较级有些是用 more,有些加er ,much是用来放前面修饰比较级的