could marbleize
Regular verb: marbleize - marbleized- marbleized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could marbleize
you could marbleize
he could marbleize
we could marbleize
you could marbleize
they could marbleize 	I could be marbleizing
you could be marbleizing
he could be marbleizing
we could be marbleizing
you could be marbleizing
they could be marbleizing	I could have marbleized
you could have marbleized
he could have marbleized
we could have marbleized
you could have marbleized
they could have marbleized	I could have been marbleizing
you could have been marbleizing
he could have been marbleizing
we could have been marbleizing
you could have been marbleizing
they could have been marbleizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not marbleize
you could not marbleize
he could not marbleize
we could not marbleize
you could not marbleize
they could not marbleize 	I could not be marbleizing
you could not be marbleizing
he could not be marbleizing
we could not be marbleizing
you could not be marbleizing
they could not be marbleizing	I could not have marbleized
you could not have marbleized
he could not have marbleized
we could not have marbleized
you could not have marbleized
they could not have marbleized	I could not have been marbleizing
you could not have been marbleizing
he could not have been marbleizing
we could not have been marbleizing
you could not have been marbleizing
they could not have been marbleizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I marbleize?
could you marbleize?
could he marbleize?
could we marbleize?
could you marbleize?
could they marbleize? 	could I be marbleizing?
could you be marbleizing?
could he be marbleizing?
could we be marbleizing?
could you be marbleizing?
could they be marbleizing? 	could I have marbleized?
could you have marbleized?
could he have marbleized?
could we have marbleized?
could you have marbleized?
could they have marbleized? 	could I have been marbleizing?
could you have been marbleizing?
could he have been marbleizing?
could we have been marbleizing?
could you have been marbleizing?
could they have been marbleizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not marbleize?
could you not marbleize?
could he not marbleize?
could we not marbleize?
could you not marbleize?
could they not marbleize? 	could I not be marbleizing?
could you not be marbleizing?
could he not be marbleizing?
could we not be marbleizing?
could you not be marbleizing?
could they not be marbleizing? 	could I not have marbleized?
could you not have marbleized?
could he not have marbleized?
could we not have marbleized?
could you not have marbleized?
could they not have marbleized? 	could I not have been marbleizing?
could you not have been marbleizing?
could he not have been marbleizing?
could we not have been marbleizing?
could you not have been marbleizing?
could they not have been marbleizing?