I could slay you could slay she could slay we could slay you could slay they could slay
V-ing form
I could be slaying you could be slaying she could be slaying we could be slaying you could be slaying they could be slaying
Perfect
I could have slain you could have slain she could have slain we could have slain you could have slain they could have slain
V-ing perfect
I could have been slaying you could have been slaying she could have been slaying we could have been slaying you could have been slaying they could have been slaying
Negation
Simple form
I could not slay you could not slay she could not slay we could not slay you could not slay they could not slay
V-ing form
I could not be slaying you could not be slaying she could not be slaying we could not be slaying you could not be slaying they could not be slaying
Perfect
I could not have slain you could not have slain she could not have slain we could not have slain you could not have slain they could not have slain
V-ing perfect
I could not have been slaying you could not have been slaying she could not have been slaying we could not have been slaying you could not have been slaying they could not have been slaying
Interrogative form
Simple form
could I slay? could you slay? could she slay? could we slay? could you slay? could they slay?
V-ing form
could I be slaying? could you be slaying? could she be slaying? could we be slaying? could you be slaying? could they be slaying?
Perfect
could I have slain? could you have slain? could she have slain? could we have slain? could you have slain? could they have slain?
V-ing perfect
could I have been slaying? could you have been slaying? could she have been slaying? could we have been slaying? could you have been slaying? could they have been slaying?
Interro-negative form
Simple form
could I not slay? could you not slay? could she not slay? could we not slay? could you not slay? could they not slay?
V-ing form
could I not be slaying? could you not be slaying? could she not be slaying? could we not be slaying? could you not be slaying? could they not be slaying?
Perfect
could I not have slain? could you not have slain? could she not have slain? could we not have slain? could you not have slain? could they not have slain?
V-ing perfect
could I not have been slaying? could you not have been slaying? could she not have been slaying? could we not have been slaying? could you not have been slaying? could they not have been slaying?