I could belay you could belay she could belay we could belay you could belay they could belay
V-ing form
I could be belaying you could be belaying she could be belaying we could be belaying you could be belaying they could be belaying
Perfect
I could have belayed you could have belayed she 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 she 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 she 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 she 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 she 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 she 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 she belay? could we belay? could you belay? could they belay?
V-ing form
could I be belaying? could you be belaying? could she be belaying? could we be belaying? could you be belaying? could they be belaying?
Perfect
could I have belayed? could you have belayed? could she 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 she 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 she 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 she 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 she 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 she have been belaying? couldn't we have been belaying? couldn't you have been belaying? couldn't they have been belaying?