  Proceeding from the simplest field theoretical model of 2D metal, the normal
phase Green functions of the weakly interacting fermions and the order
parameter fluctuations (responsible for the attraction between fermions) are
obtained. It is shown that taking into consideration the fluctuations mentioned
leads to a considerable reduction of the fermion wave function renormalization
constant (quasiparticle weight) as well as to a linear dependence of the
quasiparticle damping on the temperature. A general dependence of 2D Fermi
liquid properties on the fermion density is discussed. The relevance of the
proposed model to the marginal behavior of the Fermi liquid of high--$T_c$
superconductors, in particular, to their linear temperature dependence of the
resistivity is indicated.
