An
uncommon Japanese verb base. The only context in which you are
likely to encounter or make use of it is the "informal inclusive
command form", which is a fancy of way of saying "the let's do x form".
Less
polite than the
-mashoo form used with
Base 2.
To form Godan verbs into Base 5, follow this pattern:
For
Ichidan verbs, drop the final
-ru and replace it with
yoo. For example:
Kuru and
suru become
koyoo and
shiyoo in Base 5.
As described above, Base 5 with no ending is the inclusive
imperative:
Kaeroo.
Let's go home.
Asu mata koyoo ka.
Shall we come again tomorrow?
Another possible ending is to omou, which conveys "I think
I'll...". Note that omou is a verb itself and must needs be
conjugated:
Watashi wa atarashii kuruma o kaoo to omoimasu.
I'm thinking of buying a new car.