I could bleed you could bleed he could bleed we could bleed you could bleed they could bleed
V-ing form
I could be bleeding you could be bleeding he could be bleeding we could be bleeding you could be bleeding they could be bleeding
Perfect
I could have bled you could have bled he could have bled we could have bled you could have bled they could have bled
V-ing perfect
I could have been bleeding you could have been bleeding he could have been bleeding we could have been bleeding you could have been bleeding they could have been bleeding
Negation
Simple form
I could not bleed you could not bleed he could not bleed we could not bleed you could not bleed they could not bleed
V-ing form
I could not be bleeding you could not be bleeding he could not be bleeding we could not be bleeding you could not be bleeding they could not be bleeding
Perfect
I could not have bled you could not have bled he could not have bled we could not have bled you could not have bled they could not have bled
V-ing perfect
I could not have been bleeding you could not have been bleeding he could not have been bleeding we could not have been bleeding you could not have been bleeding they could not have been bleeding
Interrogative form
Simple form
could I bleed? could you bleed? could he bleed? could we bleed? could you bleed? could they bleed?
V-ing form
could I be bleeding? could you be bleeding? could he be bleeding? could we be bleeding? could you be bleeding? could they be bleeding?
Perfect
could I have bled? could you have bled? could he have bled? could we have bled? could you have bled? could they have bled?
V-ing perfect
could I have been bleeding? could you have been bleeding? could he have been bleeding? could we have been bleeding? could you have been bleeding? could they have been bleeding?
Interro-negative form
Simple form
could I not bleed? could you not bleed? could he not bleed? could we not bleed? could you not bleed? could they not bleed?
V-ing form
could I not be bleeding? could you not be bleeding? could he not be bleeding? could we not be bleeding? could you not be bleeding? could they not be bleeding?
Perfect
could I not have bled? could you not have bled? could he not have bled? could we not have bled? could you not have bled? could they not have bled?
V-ing perfect
could I not have been bleeding? could you not have been bleeding? could he not have been bleeding? could we not have been bleeding? could you not have been bleeding? could they not have been bleeding?