I could hie you could hie he could hie we could hie you could hie they could hie
V-ing form
I could be hying you could be hying he could be hying we could be hying you could be hying they could be hying
Perfect
I could have hied you could have hied he 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 he 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 he 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 he 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 he 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 he 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 he hie? could we hie? could you hie? could they hie?
V-ing form
could I be hying? could you be hying? could he be hying? could we be hying? could you be hying? could they be hying?
Perfect
could I have hied? could you have hied? could he 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 he 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 he 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 he 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 he 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 he not have been hying? could we not have been hying? could you not have been hying? could they not have been hying?