could pumice
Regular verb: pumice - pumiced- pumiced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could pumice
you could pumice
she could pumice
we could pumice
you could pumice
they could pumice 	I could be pumicing
you could be pumicing
she could be pumicing
we could be pumicing
you could be pumicing
they could be pumicing	I could have pumiced
you could have pumiced
she could have pumiced
we could have pumiced
you could have pumiced
they could have pumiced	I could have been pumicing
you could have been pumicing
she could have been pumicing
we could have been pumicing
you could have been pumicing
they could have been pumicing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not pumice
you could not pumice
she could not pumice
we could not pumice
you could not pumice
they could not pumice 	I could not be pumicing
you could not be pumicing
she could not be pumicing
we could not be pumicing
you could not be pumicing
they could not be pumicing	I could not have pumiced
you could not have pumiced
she could not have pumiced
we could not have pumiced
you could not have pumiced
they could not have pumiced	I could not have been pumicing
you could not have been pumicing
she could not have been pumicing
we could not have been pumicing
you could not have been pumicing
they could not have been pumicing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I pumice?
could you pumice?
could she pumice?
could we pumice?
could you pumice?
could they pumice? 	could I be pumicing?
could you be pumicing?
could she be pumicing?
could we be pumicing?
could you be pumicing?
could they be pumicing? 	could I have pumiced?
could you have pumiced?
could she have pumiced?
could we have pumiced?
could you have pumiced?
could they have pumiced? 	could I have been pumicing?
could you have been pumicing?
could she have been pumicing?
could we have been pumicing?
could you have been pumicing?
could they have been pumicing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not pumice?
could you not pumice?
could she not pumice?
could we not pumice?
could you not pumice?
could they not pumice? 	could I not be pumicing?
could you not be pumicing?
could she not be pumicing?
could we not be pumicing?
could you not be pumicing?
could they not be pumicing? 	could I not have pumiced?
could you not have pumiced?
could she not have pumiced?
could we not have pumiced?
could you not have pumiced?
could they not have pumiced? 	could I not have been pumicing?
could you not have been pumicing?
could she not have been pumicing?
could we not have been pumicing?
could you not have been pumicing?
could they not have been pumicing?