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 couldn't peen
you couldn't peen
she couldn't peen
we couldn't peen
you couldn't peen
they couldn't peen 	I couldn't be peening
you couldn't be peening
she couldn't be peening
we couldn't be peening
you couldn't be peening
they couldn't be peening	I couldn't have peened
you couldn't have peened
she couldn't have peened
we couldn't have peened
you couldn't have peened
they couldn't have peened	I couldn't have been peening
you couldn't have been peening
she couldn't have been peening
we couldn't have been peening
you couldn't have been peening
they couldn't 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 	
couldn't I peen?
couldn't you peen?
couldn't she peen?
couldn't we peen?
couldn't you peen?
couldn't they peen? 	couldn't I be peening?
couldn't you be peening?
couldn't she be peening?
couldn't we be peening?
couldn't you be peening?
couldn't they be peening? 	couldn't I have peened?
couldn't you have peened?
couldn't she have peened?
couldn't we have peened?
couldn't you have peened?
couldn't they have peened? 	couldn't I have been peening?
couldn't you have been peening?
couldn't she have been peening?
couldn't we have been peening?
couldn't you have been peening?
couldn't they have been peening?