He has been here
Tom has been here(but Tom is not here at the present),we could go and ask him to lead the way.
Does the sentence of 'Tom has been here' mean Tom has ever visited here,and he has known the place here though he is not here now?

Question

He has been here
Tom has been here(but Tom is not here at the present),we could go and ask him to lead the way.
     Does the sentence of  'Tom has been here' mean Tom has ever visited here,and he has known the place here though he is not here now?

Answer

Yes, 'Tom has been here' means he has visited before and is not here at the present.
But it does not specify if he knows the place well or not.

Answer

It means that he has been in that place before, in the past. So he is no longer there but he has been there in the past.