Summary: The mode–coupling effects, observed in the behaviour of generalized hydrodynamic modes, are analyzed. The spectrum of collective modes has been calculated [Phys. Lett. A 205, 401 ff (1995)] in nine–mode approximation of the generalized collective mode approach for a Lennard–Jones fluid. It is shown that the obtained results are in full agreement with the predictions of the mode–coupling theory. The mode–coupling parameters, describing the non–analytic contributions to the generalized hydrodynamic mode spectrum, are calculated. We discuss also the relation between both the theories considered.