could peen
Regular verb: peen - peened- peened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could peen
you could peen
she could peen
we could peen
you could peen
they could peen 	I could be peening
you could be peening
she could be peening
we could be peening
you could be peening
they could be peening	I could have peened
you could have peened
she could have peened
we could have peened
you could have peened
they could have peened	I could have been peening
you could have been peening
she could have been peening
we could have been peening
you could have been peening
they could have been peening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not peen
you could not peen
she could not peen
we could not peen
you could not peen
they could not peen 	I could not be peening
you could not be peening
she could not be peening
we could not be peening
you could not be peening
they could not be peening	I could not have peened
you could not have peened
she could not have peened
we could not have peened
you could not have peened
they could not have peened	I could not have been peening
you could not have been peening
she could not have been peening
we could not have been peening
you could not have been peening
they could not have been peening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I peen?
could you peen?
could she peen?
could we peen?
could you peen?
could they peen? 	could I be peening?
could you be peening?
could she be peening?
could we be peening?
could you be peening?
could they be peening? 	could I have peened?
could you have peened?
could she have peened?
could we have peened?
could you have peened?
could they have peened? 	could I have been peening?
could you have been peening?
could she have been peening?
could we have been peening?
could you have been peening?
could they have been peening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not peen?
could you not peen?
could she not peen?
could we not peen?
could you not peen?
could they not peen? 	could I not be peening?
could you not be peening?
could she not be peening?
could we not be peening?
could you not be peening?
could they not be peening? 	could I not have peened?
could you not have peened?
could she not have peened?
could we not have peened?
could you not have peened?
could they not have peened? 	could I not have been peening?
could you not have been peening?
could she not have been peening?
could we not have been peening?
could you not have been peening?
could they not have been peening?