  We study the low energy theorems associated with the non-linearly realized
continuous E7 symmetry of the on-shell N=8 supergravity. For Nambu-Goldstone
bosons we evaluate the one-soft-scalar-bosonemission amplitudes by computing
the E7 current matrix element on the one-particle external lines. We use the
explicit form of the conserved E7 Noether current and prove that all such
matrix elements vanish in the soft momentum limit,assuming the SU(8) symmetry
of the S-matrix.This implies that all tree amplitudes vanish in the
one-soft-boson limit. We also discuss the implications of unbroken E7 symmetry
for higher-order amplitudes.
