Sure just open the two databases side by side.
In db "A" -  Click and drag the form you want into the Navigation pane in db "B".
Be aware that if all of the fields are not the exactly the same you're going to have to do some clean up.
Any code that is behind the form will probably not come over either.  You would have to grab that separately as well.

External Data - Export Group (Access)

Or in VBA Docmd.TransferDatabase

Scott thank you that worked perfectly I will just build toolbox with reusable forms and can just drag and drop.  thanks again sir.

The harder way is to open database "B" and go to the External Data tab.
Click on the New Data Source -> From Database -> Access

Specify the source db and choose import.  Basically follow the bouncing ball from there.