could monopolize
Regular verb: monopolize - monopolized- monopolized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could monopolize
you could monopolize
she could monopolize
we could monopolize
you could monopolize
they could monopolize 	I could be monopolizing
you could be monopolizing
she could be monopolizing
we could be monopolizing
you could be monopolizing
they could be monopolizing	I could have monopolized
you could have monopolized
she could have monopolized
we could have monopolized
you could have monopolized
they could have monopolized	I could have been monopolizing
you could have been monopolizing
she could have been monopolizing
we could have been monopolizing
you could have been monopolizing
they could have been monopolizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't monopolize
you couldn't monopolize
she couldn't monopolize
we couldn't monopolize
you couldn't monopolize
they couldn't monopolize 	I couldn't be monopolizing
you couldn't be monopolizing
she couldn't be monopolizing
we couldn't be monopolizing
you couldn't be monopolizing
they couldn't be monopolizing	I couldn't have monopolized
you couldn't have monopolized
she couldn't have monopolized
we couldn't have monopolized
you couldn't have monopolized
they couldn't have monopolized	I couldn't have been monopolizing
you couldn't have been monopolizing
she couldn't have been monopolizing
we couldn't have been monopolizing
you couldn't have been monopolizing
they couldn't have been monopolizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I monopolize?
could you monopolize?
could she monopolize?
could we monopolize?
could you monopolize?
could they monopolize? 	could I be monopolizing?
could you be monopolizing?
could she be monopolizing?
could we be monopolizing?
could you be monopolizing?
could they be monopolizing? 	could I have monopolized?
could you have monopolized?
could she have monopolized?
could we have monopolized?
could you have monopolized?
could they have monopolized? 	could I have been monopolizing?
could you have been monopolizing?
could she have been monopolizing?
could we have been monopolizing?
could you have been monopolizing?
could they have been monopolizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I monopolize?
couldn't you monopolize?
couldn't she monopolize?
couldn't we monopolize?
couldn't you monopolize?
couldn't they monopolize? 	couldn't I be monopolizing?
couldn't you be monopolizing?
couldn't she be monopolizing?
couldn't we be monopolizing?
couldn't you be monopolizing?
couldn't they be monopolizing? 	couldn't I have monopolized?
couldn't you have monopolized?
couldn't she have monopolized?
couldn't we have monopolized?
couldn't you have monopolized?
couldn't they have monopolized? 	couldn't I have been monopolizing?
couldn't you have been monopolizing?
couldn't she have been monopolizing?
couldn't we have been monopolizing?
couldn't you have been monopolizing?
couldn't they have been monopolizing?