I could stall-feed you could stall-feed he could stall-feed we could stall-feed you could stall-feed they could stall-feed
V-ing form
I could be stall-feeding you could be stall-feeding he could be stall-feeding we could be stall-feeding you could be stall-feeding they could be stall-feeding
Perfect
I could have stall-fed you could have stall-fed he could have stall-fed we could have stall-fed you could have stall-fed they could have stall-fed
V-ing perfect
I could have been stall-feeding you could have been stall-feeding he could have been stall-feeding we could have been stall-feeding you could have been stall-feeding they could have been stall-feeding
Negation
Simple form
I couldn't stall-feed you couldn't stall-feed he couldn't stall-feed we couldn't stall-feed you couldn't stall-feed they couldn't stall-feed
V-ing form
I couldn't be stall-feeding you couldn't be stall-feeding he couldn't be stall-feeding we couldn't be stall-feeding you couldn't be stall-feeding they couldn't be stall-feeding
Perfect
I couldn't have stall-fed you couldn't have stall-fed he couldn't have stall-fed we couldn't have stall-fed you couldn't have stall-fed they couldn't have stall-fed
V-ing perfect
I couldn't have been stall-feeding you couldn't have been stall-feeding he couldn't have been stall-feeding we couldn't have been stall-feeding you couldn't have been stall-feeding they couldn't have been stall-feeding
Interrogative form
Simple form
could I stall-feed? could you stall-feed? could he stall-feed? could we stall-feed? could you stall-feed? could they stall-feed?
V-ing form
could I be stall-feeding? could you be stall-feeding? could he be stall-feeding? could we be stall-feeding? could you be stall-feeding? could they be stall-feeding?
Perfect
could I have stall-fed? could you have stall-fed? could he have stall-fed? could we have stall-fed? could you have stall-fed? could they have stall-fed?
V-ing perfect
could I have been stall-feeding? could you have been stall-feeding? could he have been stall-feeding? could we have been stall-feeding? could you have been stall-feeding? could they have been stall-feeding?
Interro-negative form
Simple form
couldn't I stall-feed? couldn't you stall-feed? couldn't he stall-feed? couldn't we stall-feed? couldn't you stall-feed? couldn't they stall-feed?
V-ing form
couldn't I be stall-feeding? couldn't you be stall-feeding? couldn't he be stall-feeding? couldn't we be stall-feeding? couldn't you be stall-feeding? couldn't they be stall-feeding?
Perfect
couldn't I have stall-fed? couldn't you have stall-fed? couldn't he have stall-fed? couldn't we have stall-fed? couldn't you have stall-fed? couldn't they have stall-fed?
V-ing perfect
couldn't I have been stall-feeding? couldn't you have been stall-feeding? couldn't he have been stall-feeding? couldn't we have been stall-feeding? couldn't you have been stall-feeding? couldn't they have been stall-feeding?