I could hook you could hook he could hook we could hook you could hook they could hook
V-ing form
I could be hooking you could be hooking he could be hooking we could be hooking you could be hooking they could be hooking
Perfect
I could have hooked you could have hooked he could have hooked we could have hooked you could have hooked they could have hooked
V-ing perfect
I could have been hooking you could have been hooking he could have been hooking we could have been hooking you could have been hooking they could have been hooking
Negation
Simple form
I could not hook you could not hook he could not hook we could not hook you could not hook they could not hook
V-ing form
I could not be hooking you could not be hooking he could not be hooking we could not be hooking you could not be hooking they could not be hooking
Perfect
I could not have hooked you could not have hooked he could not have hooked we could not have hooked you could not have hooked they could not have hooked
V-ing perfect
I could not have been hooking you could not have been hooking he could not have been hooking we could not have been hooking you could not have been hooking they could not have been hooking
Interrogative form
Simple form
could I hook? could you hook? could he hook? could we hook? could you hook? could they hook?
V-ing form
could I be hooking? could you be hooking? could he be hooking? could we be hooking? could you be hooking? could they be hooking?
Perfect
could I have hooked? could you have hooked? could he have hooked? could we have hooked? could you have hooked? could they have hooked?
V-ing perfect
could I have been hooking? could you have been hooking? could he have been hooking? could we have been hooking? could you have been hooking? could they have been hooking?
Interro-negative form
Simple form
could I not hook? could you not hook? could he not hook? could we not hook? could you not hook? could they not hook?
V-ing form
could I not be hooking? could you not be hooking? could he not be hooking? could we not be hooking? could you not be hooking? could they not be hooking?
Perfect
could I not have hooked? could you not have hooked? could he not have hooked? could we not have hooked? could you not have hooked? could they not have hooked?
V-ing perfect
could I not have been hooking? could you not have been hooking? could he not have been hooking? could we not have been hooking? could you not have been hooking? could they not have been hooking?