In this paper we consider 'slowly' oscillating perturbations of almost peri
odic Duffing-like systems, i.e. systems of the form (u) double over dot = u
- (a(t) + alpha(omega t))W'(u), t is an element of R, u is an element of R
-N, where W is an element of C-2N(R-N, R) is superquadratic and a and alpha
are positive and almost periodic. By variational methods, we prove that if
omega > 0 is small enough, then the system admits a multibump dynamics. As
a consequence we get that the system (u) double over dot = u - a(t)W'(u),
t is an element of R, u is an element of R-N, admits multibump solutions wh
enever a belongs to an open dense subset of the set of positive almost peri
odic continuous functions.