  We present the full tree-order calculation of the process
$e^+e^-\to\ell\bar{\nu}_\ell\; q \bqp$ including the width effects in a way
which is consistent with gauge invariance and high energy unitarity and which
has a natural interpretation within standard perturbation theory. We also
include C- and P-preserving deviations from Standard Model trilinear vector
boson couplings. An analysis of the sensitivity of these channels on the
trilinear couplings, using well measured angular variables of the four fermion
final state, is also presented.
