could retabulate
Regular verb: retabulate - retabulated- retabulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could retabulate
you could retabulate
she could retabulate
we could retabulate
you could retabulate
they could retabulate 	I could be retabulating
you could be retabulating
she could be retabulating
we could be retabulating
you could be retabulating
they could be retabulating	I could have retabulated
you could have retabulated
she could have retabulated
we could have retabulated
you could have retabulated
they could have retabulated	I could have been retabulating
you could have been retabulating
she could have been retabulating
we could have been retabulating
you could have been retabulating
they could have been retabulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't retabulate
you couldn't retabulate
she couldn't retabulate
we couldn't retabulate
you couldn't retabulate
they couldn't retabulate 	I couldn't be retabulating
you couldn't be retabulating
she couldn't be retabulating
we couldn't be retabulating
you couldn't be retabulating
they couldn't be retabulating	I couldn't have retabulated
you couldn't have retabulated
she couldn't have retabulated
we couldn't have retabulated
you couldn't have retabulated
they couldn't have retabulated	I couldn't have been retabulating
you couldn't have been retabulating
she couldn't have been retabulating
we couldn't have been retabulating
you couldn't have been retabulating
they couldn't have been retabulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I retabulate?
could you retabulate?
could she retabulate?
could we retabulate?
could you retabulate?
could they retabulate? 	could I be retabulating?
could you be retabulating?
could she be retabulating?
could we be retabulating?
could you be retabulating?
could they be retabulating? 	could I have retabulated?
could you have retabulated?
could she have retabulated?
could we have retabulated?
could you have retabulated?
could they have retabulated? 	could I have been retabulating?
could you have been retabulating?
could she have been retabulating?
could we have been retabulating?
could you have been retabulating?
could they have been retabulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I retabulate?
couldn't you retabulate?
couldn't she retabulate?
couldn't we retabulate?
couldn't you retabulate?
couldn't they retabulate? 	couldn't I be retabulating?
couldn't you be retabulating?
couldn't she be retabulating?
couldn't we be retabulating?
couldn't you be retabulating?
couldn't they be retabulating? 	couldn't I have retabulated?
couldn't you have retabulated?
couldn't she have retabulated?
couldn't we have retabulated?
couldn't you have retabulated?
couldn't they have retabulated? 	couldn't I have been retabulating?
couldn't you have been retabulating?
couldn't she have been retabulating?
couldn't we have been retabulating?
couldn't you have been retabulating?
couldn't they have been retabulating?