I could burgeon you could burgeon she could burgeon we could burgeon you could burgeon they could burgeon
V-ing form
I could be burgeoning you could be burgeoning she could be burgeoning we could be burgeoning you could be burgeoning they could be burgeoning
Perfect
I could have burgeoned you could have burgeoned she could have burgeoned we could have burgeoned you could have burgeoned they could have burgeoned
V-ing perfect
I could have been burgeoning you could have been burgeoning she could have been burgeoning we could have been burgeoning you could have been burgeoning they could have been burgeoning
Negation
Simple form
I could not burgeon you could not burgeon she could not burgeon we could not burgeon you could not burgeon they could not burgeon
V-ing form
I could not be burgeoning you could not be burgeoning she could not be burgeoning we could not be burgeoning you could not be burgeoning they could not be burgeoning
Perfect
I could not have burgeoned you could not have burgeoned she could not have burgeoned we could not have burgeoned you could not have burgeoned they could not have burgeoned
V-ing perfect
I could not have been burgeoning you could not have been burgeoning she could not have been burgeoning we could not have been burgeoning you could not have been burgeoning they could not have been burgeoning
Interrogative form
Simple form
could I burgeon? could you burgeon? could she burgeon? could we burgeon? could you burgeon? could they burgeon?
V-ing form
could I be burgeoning? could you be burgeoning? could she be burgeoning? could we be burgeoning? could you be burgeoning? could they be burgeoning?
Perfect
could I have burgeoned? could you have burgeoned? could she have burgeoned? could we have burgeoned? could you have burgeoned? could they have burgeoned?
V-ing perfect
could I have been burgeoning? could you have been burgeoning? could she have been burgeoning? could we have been burgeoning? could you have been burgeoning? could they have been burgeoning?
Interro-negative form
Simple form
could I not burgeon? could you not burgeon? could she not burgeon? could we not burgeon? could you not burgeon? could they not burgeon?
V-ing form
could I not be burgeoning? could you not be burgeoning? could she not be burgeoning? could we not be burgeoning? could you not be burgeoning? could they not be burgeoning?
Perfect
could I not have burgeoned? could you not have burgeoned? could she not have burgeoned? could we not have burgeoned? could you not have burgeoned? could they not have burgeoned?
V-ing perfect
could I not have been burgeoning? could you not have been burgeoning? could she not have been burgeoning? could we not have been burgeoning? could you not have been burgeoning? could they not have been burgeoning?