I could curse you could curse she could curse we could curse you could curse they could curse
V-ing form
I could be cursing you could be cursing she could be cursing we could be cursing you could be cursing they could be cursing
Perfect
I could have cursed you could have cursed she could have cursed we could have cursed you could have cursed they could have cursed
V-ing perfect
I could have been cursing you could have been cursing she could have been cursing we could have been cursing you could have been cursing they could have been cursing
Negation
Simple form
I could not curse you could not curse she could not curse we could not curse you could not curse they could not curse
V-ing form
I could not be cursing you could not be cursing she could not be cursing we could not be cursing you could not be cursing they could not be cursing
Perfect
I could not have cursed you could not have cursed she could not have cursed we could not have cursed you could not have cursed they could not have cursed
V-ing perfect
I could not have been cursing you could not have been cursing she could not have been cursing we could not have been cursing you could not have been cursing they could not have been cursing
Interrogative form
Simple form
could I curse? could you curse? could she curse? could we curse? could you curse? could they curse?
V-ing form
could I be cursing? could you be cursing? could she be cursing? could we be cursing? could you be cursing? could they be cursing?
Perfect
could I have cursed? could you have cursed? could she have cursed? could we have cursed? could you have cursed? could they have cursed?
V-ing perfect
could I have been cursing? could you have been cursing? could she have been cursing? could we have been cursing? could you have been cursing? could they have been cursing?
Interro-negative form
Simple form
could I not curse? could you not curse? could she not curse? could we not curse? could you not curse? could they not curse?
V-ing form
could I not be cursing? could you not be cursing? could she not be cursing? could we not be cursing? could you not be cursing? could they not be cursing?
Perfect
could I not have cursed? could you not have cursed? could she not have cursed? could we not have cursed? could you not have cursed? could they not have cursed?
V-ing perfect
could I not have been cursing? could you not have been cursing? could she not have been cursing? could we not have been cursing? could you not have been cursing? could they not have been cursing?