  In this paper, we study the properties of gravitational waves in the
scalar-tensor-vector gravity theory. The polarizations of the gravitational
waves are investigated by analyzing the relative motion of the test particles.
It is found that the interaction between the matter and vector field in the
theory leads to two additional transverse polarization modes. By making use of
the polarization content, the stress-energy pseudo-tensor is calculated by
employing the perturbed equation method. Besides, the relaxed field equation
for the modified gravity in question is derived by using the Landau-Lifshitz
formalism suitable to systems with non-negligible self-gravity.
