  The present accelerated expansion of the universe has enriched the list of
possible scenarios for its fate, singular or not. In this paper a unifying
framework for analyzing such behaviors is proposed, based on generalized power
and asymptotic expansions of the barotropic index $w$, or equivalently of the
deceleration parameter $q$, in terms of the time coordinate. Besides well known
singular and non-singular future behaviors, other types of strong singularities
appear around the phantom divide in flat models, with features similar to those
of big rip or big bang/crunch, which we have dubbed grand rip and grand
bang/crunch respectively, since energy density and pressure diverge faster than
$t^{-2}$ in coordinate time. In addition to this, the scale factor does not
admit convergent generalized power series around these singularities with a
finite number of terms with negative powers.
