  We calculate helicity amplitudes for $e^-e^+\to W^-W^+$ analytically in the
Feynman-diagram (FD) gauge. We show that, unlike in the unitary gauge, there is
no energy growth of the individual Feynman amplitudes for the longitudinally
polarized W bosons, and the contributions from the associated Goldstone bosons
are manifest even without taking the high-energy limit. We also find that the
physical distributions can be interpreted by the individual amplitudes in the
FD gauge.
