could curse
Regular verb: curse - cursed- cursed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could curse
you could curse
he could curse
we could curse
you could curse
they could curse 	I could be cursing
you could be cursing
he could be cursing
we could be cursing
you could be cursing
they could be cursing	I could have cursed
you could have cursed
he could have cursed
we could have cursed
you could have cursed
they could have cursed	I could have been cursing
you could have been cursing
he could have been cursing
we could have been cursing
you could have been cursing
they could have been cursing	

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

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