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