Here are some ways to rephrase it depending on the intended meaning:
If you want to say someone has been eavesdropping:
* "Have been eavesdropping." This is the most direct and simple way to say it.
* "Have been listening in on conversations." This is a more specific way to say it.
* "Have been privy to private conversations." This implies that the person has been able to hear things they shouldn't have.
If you want to say someone has been close to a situation:
* "Have been close to the action." This suggests that someone has been in a position to witness or hear what is happening.
* "Have been in the thick of things." This means someone has been involved in a situation, even if they haven't been actively participating.
It's important to consider the context of the situation and the intended meaning when choosing the best way to rephrase the phrase.