这里为什么用some?

有读者问:

When I asked him if he had broken some rule of working machinery, he shook his head.

在这一句中,为什么用some而不用any?

在if(意谓“假如”或“是否”)引导的从句中,用some或any皆可,似乎没有什么区别,再如:

(1)If you want some (any )help, let me know.

(2)If we had some (any )money, we could buy it.