because or why
the reason for, for the reason that, due to the fact that, owing to the fact that, in light of the fact, on the grounds that, this is why
when
on the occasion of, in a situation in which, under circumstances in which
about
as regards, in reference to, with regard to, concerning the matter of
must or should
it is crucial that, it is necessary that, there is a need/necessity for, it is important that
can
is able to, is in a position to, has the capacity for, has the ability to
may, might, can, or could
it is possible that, there is a chance that, it could happen that, the possibility exists for
now
at this time, after further consideration
by
by using, through the use of
of
derived from, related to, associated with
to
in order to
use
Utilize, employ, make use of