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