Superbranes and super Born-Infeld theories from nonlinear realizations

We describe, on a few instructive examples, a systematic way of deducing th e superfield equations of motion of superbranes in the approach of partial breaking of global supersymmetry (PBGS) from the nonlinear-realizations for malism. For D-branes these equations simultaneously represent the appropria te supersymmetric Born-Infeld theories. We also discuss how to construct an off-shell superfield action for the N = 2, d = 4 Dirac-Born-Infeld theory corresponding to the partial supersymmetry breaking N = 4 --> N = 2 in d = 4.