I could burgeon you could burgeon he could burgeon we could burgeon you could burgeon they could burgeon
V-ing form
I could be burgeoning you could be burgeoning he could be burgeoning we could be burgeoning you could be burgeoning they could be burgeoning
Perfect
I could have burgeoned you could have burgeoned he 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 he could have been burgeoning we could have been burgeoning you could have been burgeoning they could have been burgeoning
Negation
Simple form
I couldn't burgeon you couldn't burgeon he couldn't burgeon we couldn't burgeon you couldn't burgeon they couldn't burgeon
V-ing form
I couldn't be burgeoning you couldn't be burgeoning he couldn't be burgeoning we couldn't be burgeoning you couldn't be burgeoning they couldn't be burgeoning
Perfect
I couldn't have burgeoned you couldn't have burgeoned he couldn't have burgeoned we couldn't have burgeoned you couldn't have burgeoned they couldn't have burgeoned
V-ing perfect
I couldn't have been burgeoning you couldn't have been burgeoning he couldn't have been burgeoning we couldn't have been burgeoning you couldn't have been burgeoning they couldn't have been burgeoning
Interrogative form
Simple form
could I burgeon? could you burgeon? could he burgeon? could we burgeon? could you burgeon? could they burgeon?
V-ing form
could I be burgeoning? could you be burgeoning? could he be burgeoning? could we be burgeoning? could you be burgeoning? could they be burgeoning?
Perfect
could I have burgeoned? could you have burgeoned? could he 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 he have been burgeoning? could we have been burgeoning? could you have been burgeoning? could they have been burgeoning?
Interro-negative form
Simple form
couldn't I burgeon? couldn't you burgeon? couldn't he burgeon? couldn't we burgeon? couldn't you burgeon? couldn't they burgeon?
V-ing form
couldn't I be burgeoning? couldn't you be burgeoning? couldn't he be burgeoning? couldn't we be burgeoning? couldn't you be burgeoning? couldn't they be burgeoning?
Perfect
couldn't I have burgeoned? couldn't you have burgeoned? couldn't he have burgeoned? couldn't we have burgeoned? couldn't you have burgeoned? couldn't they have burgeoned?
V-ing perfect
couldn't I have been burgeoning? couldn't you have been burgeoning? couldn't he have been burgeoning? couldn't we have been burgeoning? couldn't you have been burgeoning? couldn't they have been burgeoning?