I could hie you could hie she could hie we could hie you could hie they could hie
V-ing form
I could be hying you could be hying she could be hying we could be hying you could be hying they could be hying
Perfect
I could have hied you could have hied she could have hied we could have hied you could have hied they could have hied
V-ing perfect
I could have been hying you could have been hying she could have been hying we could have been hying you could have been hying they could have been hying
Negation
Simple form
I could not hie you could not hie she could not hie we could not hie you could not hie they could not hie
V-ing form
I could not be hying you could not be hying she could not be hying we could not be hying you could not be hying they could not be hying
Perfect
I could not have hied you could not have hied she could not have hied we could not have hied you could not have hied they could not have hied
V-ing perfect
I could not have been hying you could not have been hying she could not have been hying we could not have been hying you could not have been hying they could not have been hying
Interrogative form
Simple form
could I hie? could you hie? could she hie? could we hie? could you hie? could they hie?
V-ing form
could I be hying? could you be hying? could she be hying? could we be hying? could you be hying? could they be hying?
Perfect
could I have hied? could you have hied? could she have hied? could we have hied? could you have hied? could they have hied?
V-ing perfect
could I have been hying? could you have been hying? could she have been hying? could we have been hying? could you have been hying? could they have been hying?
Interro-negative form
Simple form
could I not hie? could you not hie? could she not hie? could we not hie? could you not hie? could they not hie?
V-ing form
could I not be hying? could you not be hying? could she not be hying? could we not be hying? could you not be hying? could they not be hying?
Perfect
could I not have hied? could you not have hied? could she not have hied? could we not have hied? could you not have hied? could they not have hied?
V-ing perfect
could I not have been hying? could you not have been hying? could she not have been hying? could we not have been hying? could you not have been hying? could they not have been hying?