  We derive a relation between correlation functions of supergroup WZNW models
and conformal field theories with extended superconformal symmetry. The
supergroups considered have a bosonic subgroup of the form SL(2) x A for some
Lie group A. The corresponding conformal field theory is a super Liouville
field theory coupled with the WZNW model on A. An example is a correspondence
between the PSU(1,1|2) WZNW model and small N=4 super Liouville field theory.
The OSP(n|2) WZNW model is related to a superconformal field theory with SO(n)
extended superconformal symmetry of the Knizhnik-Bershadsky type. In the case
n=4 this is simply the large N=(4,4) superconformal symmetry. Besides these two
examples we make a general derivation encompassing the WZNW models on
supergroups SL(2|n), D(2,1;\alpha), OSP(4|2n), F(4) and G(3) and their relation
to models with extended superconformal algebras as symmetry.
