could counterpetition
Regular verb: counterpetition - counterpetitioned- counterpetitioned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could counterpetition
you could counterpetition
she could counterpetition
we could counterpetition
you could counterpetition
they could counterpetition 	I could be counterpetitioning
you could be counterpetitioning
she could be counterpetitioning
we could be counterpetitioning
you could be counterpetitioning
they could be counterpetitioning	I could have counterpetitioned
you could have counterpetitioned
she could have counterpetitioned
we could have counterpetitioned
you could have counterpetitioned
they could have counterpetitioned	I could have been counterpetitioning
you could have been counterpetitioning
she could have been counterpetitioning
we could have been counterpetitioning
you could have been counterpetitioning
they could have been counterpetitioning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't counterpetition
you couldn't counterpetition
she couldn't counterpetition
we couldn't counterpetition
you couldn't counterpetition
they couldn't counterpetition 	I couldn't be counterpetitioning
you couldn't be counterpetitioning
she couldn't be counterpetitioning
we couldn't be counterpetitioning
you couldn't be counterpetitioning
they couldn't be counterpetitioning	I couldn't have counterpetitioned
you couldn't have counterpetitioned
she couldn't have counterpetitioned
we couldn't have counterpetitioned
you couldn't have counterpetitioned
they couldn't have counterpetitioned	I couldn't have been counterpetitioning
you couldn't have been counterpetitioning
she couldn't have been counterpetitioning
we couldn't have been counterpetitioning
you couldn't have been counterpetitioning
they couldn't have been counterpetitioning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I counterpetition?
could you counterpetition?
could she counterpetition?
could we counterpetition?
could you counterpetition?
could they counterpetition? 	could I be counterpetitioning?
could you be counterpetitioning?
could she be counterpetitioning?
could we be counterpetitioning?
could you be counterpetitioning?
could they be counterpetitioning? 	could I have counterpetitioned?
could you have counterpetitioned?
could she have counterpetitioned?
could we have counterpetitioned?
could you have counterpetitioned?
could they have counterpetitioned? 	could I have been counterpetitioning?
could you have been counterpetitioning?
could she have been counterpetitioning?
could we have been counterpetitioning?
could you have been counterpetitioning?
could they have been counterpetitioning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I counterpetition?
couldn't you counterpetition?
couldn't she counterpetition?
couldn't we counterpetition?
couldn't you counterpetition?
couldn't they counterpetition? 	couldn't I be counterpetitioning?
couldn't you be counterpetitioning?
couldn't she be counterpetitioning?
couldn't we be counterpetitioning?
couldn't you be counterpetitioning?
couldn't they be counterpetitioning? 	couldn't I have counterpetitioned?
couldn't you have counterpetitioned?
couldn't she have counterpetitioned?
couldn't we have counterpetitioned?
couldn't you have counterpetitioned?
couldn't they have counterpetitioned? 	couldn't I have been counterpetitioning?
couldn't you have been counterpetitioning?
couldn't she have been counterpetitioning?
couldn't we have been counterpetitioning?
couldn't you have been counterpetitioning?
couldn't they have been counterpetitioning?