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