我怎么花钱不关你的事。

How I spend my money ___is ___none ___of your ___business.

她和谁约会与我们无关，所以我们别在背后议论了。

Who she dates ___is ___none ___of our ___business, so let's not gossip about it.

他们的婚姻里发生什么，除了他们自己，与任何人都无关。

What happens in their marriage ___is ___none ___of anyone's ___business but their own.