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