Having a good diet is of great importance to keeping healthy.为什么要用keeping,to不是要跟原型吗?、、

Having a good diet is of great importance to keeping healthy.为什么要用keeping,to不是要跟原型吗?、、
Having a good diet is of great importance to keeping healthy.
为什么要用keeping,to不是要跟原型吗?、、

Having a good diet is of great importance to keeping healthy.为什么要用keeping,to不是要跟原型吗?、、
Having a good diet is of great importance to keeping healthy.
这边的to不是不定式的to,而是介词的to,所以后面要用ing形式

这里的to是介词 不是不定式 要用keeping

to是介词，后面要用ing

这句话的意思是：良好的饮食习惯对保证身体健康至关重要。
to这里的意思是对于....后面是状语，名词状语，所以用ing形式。