My logic for how I understand/define “having been” is to use ” have been” in a sentence first, like this: ”...you have been doing that for a while (or all this time)” and ”...you have been here for a while (or all this time). The mental pictures I have in my head when I think of “have been” in these two examples is: 1. a person goes to a desk at a library and studies everyday and then I meet the person and we talk. The person says I study at the library every day and only then can I reply: you have been doing that for a while (or all this time), 2. a person sits in front of the TV from morning to night and then I knock on the door and we talk. The person says I sit in front of the TV from morning to night and only then can I reply: you have been here all this time. I first need to recognize when I can use “have been”, then I can recognize how “having been” applies and I can use it in my thoughts or out loud, like this: “having been in the library doing something every day she goes to the library, this person has developed useful study habits” and “having been in front of the TV watching it from morning to night, this person has really gained weight.” I can’t understand/define “having been” without “have been” and to me “doing” and “here” are two examples of words that I can choose from to place after “having been” or “have been” when I speak and write.