  We consider the BRST symmetric four dimensional BF theory, a topological
theory, containing antysymmetric tensor fields in Landau gauge and extend the
BRST symmetry by introducing a shift symmetry to it. Within this formulation,
the antighost fields corresponding to shift symmetry coincide with antifields
of standard field/antifield formulation. Further, we provide a superspace
description for the BF model possessing extended BRST and extended anti-BRST
transformations.
