could prose
Regular verb: prose - prosed- prosed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could prose
you could prose
she could prose
we could prose
you could prose
they could prose 	I could be prosing
you could be prosing
she could be prosing
we could be prosing
you could be prosing
they could be prosing	I could have prosed
you could have prosed
she could have prosed
we could have prosed
you could have prosed
they could have prosed	I could have been prosing
you could have been prosing
she could have been prosing
we could have been prosing
you could have been prosing
they could have been prosing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not prose
you could not prose
she could not prose
we could not prose
you could not prose
they could not prose 	I could not be prosing
you could not be prosing
she could not be prosing
we could not be prosing
you could not be prosing
they could not be prosing	I could not have prosed
you could not have prosed
she could not have prosed
we could not have prosed
you could not have prosed
they could not have prosed	I could not have been prosing
you could not have been prosing
she could not have been prosing
we could not have been prosing
you could not have been prosing
they could not have been prosing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I prose?
could you prose?
could she prose?
could we prose?
could you prose?
could they prose? 	could I be prosing?
could you be prosing?
could she be prosing?
could we be prosing?
could you be prosing?
could they be prosing? 	could I have prosed?
could you have prosed?
could she have prosed?
could we have prosed?
could you have prosed?
could they have prosed? 	could I have been prosing?
could you have been prosing?
could she have been prosing?
could we have been prosing?
could you have been prosing?
could they have been prosing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not prose?
could you not prose?
could she not prose?
could we not prose?
could you not prose?
could they not prose? 	could I not be prosing?
could you not be prosing?
could she not be prosing?
could we not be prosing?
could you not be prosing?
could they not be prosing? 	could I not have prosed?
could you not have prosed?
could she not have prosed?
could we not have prosed?
could you not have prosed?
could they not have prosed? 	could I not have been prosing?
could you not have been prosing?
could she not have been prosing?
could we not have been prosing?
could you not have been prosing?
could they not have been prosing?