I could bellyache you could bellyache she could bellyache we could bellyache you could bellyache they could bellyache
V-ing form
I could be bellyaching you could be bellyaching she could be bellyaching we could be bellyaching you could be bellyaching they could be bellyaching
Perfect
I could have bellyached you could have bellyached she could have bellyached we could have bellyached you could have bellyached they could have bellyached
V-ing perfect
I could have been bellyaching you could have been bellyaching she could have been bellyaching we could have been bellyaching you could have been bellyaching they could have been bellyaching
Negation
Simple form
I could not bellyache you could not bellyache she could not bellyache we could not bellyache you could not bellyache they could not bellyache
V-ing form
I could not be bellyaching you could not be bellyaching she could not be bellyaching we could not be bellyaching you could not be bellyaching they could not be bellyaching
Perfect
I could not have bellyached you could not have bellyached she could not have bellyached we could not have bellyached you could not have bellyached they could not have bellyached
V-ing perfect
I could not have been bellyaching you could not have been bellyaching she could not have been bellyaching we could not have been bellyaching you could not have been bellyaching they could not have been bellyaching
Interrogative form
Simple form
could I bellyache? could you bellyache? could she bellyache? could we bellyache? could you bellyache? could they bellyache?
V-ing form
could I be bellyaching? could you be bellyaching? could she be bellyaching? could we be bellyaching? could you be bellyaching? could they be bellyaching?
Perfect
could I have bellyached? could you have bellyached? could she have bellyached? could we have bellyached? could you have bellyached? could they have bellyached?
V-ing perfect
could I have been bellyaching? could you have been bellyaching? could she have been bellyaching? could we have been bellyaching? could you have been bellyaching? could they have been bellyaching?
Interro-negative form
Simple form
could I not bellyache? could you not bellyache? could she not bellyache? could we not bellyache? could you not bellyache? could they not bellyache?
V-ing form
could I not be bellyaching? could you not be bellyaching? could she not be bellyaching? could we not be bellyaching? could you not be bellyaching? could they not be bellyaching?
Perfect
could I not have bellyached? could you not have bellyached? could she not have bellyached? could we not have bellyached? could you not have bellyached? could they not have bellyached?
V-ing perfect
could I not have been bellyaching? could you not have been bellyaching? could she not have been bellyaching? could we not have been bellyaching? could you not have been bellyaching? could they not have been bellyaching?