could patter
Regular verb: patter - pattered- pattered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could patter
you could patter
she could patter
we could patter
you could patter
they could patter 	I could be pattering
you could be pattering
she could be pattering
we could be pattering
you could be pattering
they could be pattering	I could have pattered
you could have pattered
she could have pattered
we could have pattered
you could have pattered
they could have pattered	I could have been pattering
you could have been pattering
she could have been pattering
we could have been pattering
you could have been pattering
they could have been pattering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not patter
you could not patter
she could not patter
we could not patter
you could not patter
they could not patter 	I could not be pattering
you could not be pattering
she could not be pattering
we could not be pattering
you could not be pattering
they could not be pattering	I could not have pattered
you could not have pattered
she could not have pattered
we could not have pattered
you could not have pattered
they could not have pattered	I could not have been pattering
you could not have been pattering
she could not have been pattering
we could not have been pattering
you could not have been pattering
they could not have been pattering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I patter?
could you patter?
could she patter?
could we patter?
could you patter?
could they patter? 	could I be pattering?
could you be pattering?
could she be pattering?
could we be pattering?
could you be pattering?
could they be pattering? 	could I have pattered?
could you have pattered?
could she have pattered?
could we have pattered?
could you have pattered?
could they have pattered? 	could I have been pattering?
could you have been pattering?
could she have been pattering?
could we have been pattering?
could you have been pattering?
could they have been pattering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not patter?
could you not patter?
could she not patter?
could we not patter?
could you not patter?
could they not patter? 	could I not be pattering?
could you not be pattering?
could she not be pattering?
could we not be pattering?
could you not be pattering?
could they not be pattering? 	could I not have pattered?
could you not have pattered?
could she not have pattered?
could we not have pattered?
could you not have pattered?
could they not have pattered? 	could I not have been pattering?
could you not have been pattering?
could she not have been pattering?
could we not have been pattering?
could you not have been pattering?
could they not have been pattering?