Some could see a spirit or ghost in that way but that isnt what many refer to a true shadow being.
Shadow beings are a certain type of negative entity who thrives on negative energy. They tend to move fast and usually try to avoid being seen, they quickly move and hide from view if they think they are about to be seen eg so often seen out of corner of ones eye as like a shadow of someone (thou that also can be the case for other beings too but with others there is often a different reason for that as clairvoyant sight works best on the eye receptors we dont use as much). Shadow beings are thin or average in body (ive never heard of anyone seeing an overweight shadow being
and are cunning and sly beings. They do not like us (one may catch a shadow being leering at one from the shadows).
These beings feed off of our energy and can leave us sick.
They have their own realm (world) where they come from. I think Ive only heard of people seeing male shadow beings (so maybe their females dont leave their world?). Research the race of beings Im speaking of and one will read LOTS of peoples experiences but they are all male beings (sometimes they will be seen wearing a hat).
Ive been told by one who believed she'd been to the shadow beings world (someone I knew who had ability to astral travel/remote view places) that a shadow being she followed back was living in his world in a castle and there was shadow being females there etc. They actually had families.
I dont know which kind of 'shadow being" you were refering too.. one of that race or just a being in which you couldnt see well so appeared like a shadow. If it was of a shadow being race.. those ones arent to be at all trusted (they tell a lot of lies, expect deception).