could ozonize
Regular verb: ozonize - ozonized- ozonized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could ozonize
you could ozonize
he could ozonize
we could ozonize
you could ozonize
they could ozonize 	I could be ozonizing
you could be ozonizing
he could be ozonizing
we could be ozonizing
you could be ozonizing
they could be ozonizing	I could have ozonized
you could have ozonized
he could have ozonized
we could have ozonized
you could have ozonized
they could have ozonized	I could have been ozonizing
you could have been ozonizing
he could have been ozonizing
we could have been ozonizing
you could have been ozonizing
they could have been ozonizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't ozonize
you couldn't ozonize
he couldn't ozonize
we couldn't ozonize
you couldn't ozonize
they couldn't ozonize 	I couldn't be ozonizing
you couldn't be ozonizing
he couldn't be ozonizing
we couldn't be ozonizing
you couldn't be ozonizing
they couldn't be ozonizing	I couldn't have ozonized
you couldn't have ozonized
he couldn't have ozonized
we couldn't have ozonized
you couldn't have ozonized
they couldn't have ozonized	I couldn't have been ozonizing
you couldn't have been ozonizing
he couldn't have been ozonizing
we couldn't have been ozonizing
you couldn't have been ozonizing
they couldn't have been ozonizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I ozonize?
could you ozonize?
could he ozonize?
could we ozonize?
could you ozonize?
could they ozonize? 	could I be ozonizing?
could you be ozonizing?
could he be ozonizing?
could we be ozonizing?
could you be ozonizing?
could they be ozonizing? 	could I have ozonized?
could you have ozonized?
could he have ozonized?
could we have ozonized?
could you have ozonized?
could they have ozonized? 	could I have been ozonizing?
could you have been ozonizing?
could he have been ozonizing?
could we have been ozonizing?
could you have been ozonizing?
could they have been ozonizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I ozonize?
couldn't you ozonize?
couldn't he ozonize?
couldn't we ozonize?
couldn't you ozonize?
couldn't they ozonize? 	couldn't I be ozonizing?
couldn't you be ozonizing?
couldn't he be ozonizing?
couldn't we be ozonizing?
couldn't you be ozonizing?
couldn't they be ozonizing? 	couldn't I have ozonized?
couldn't you have ozonized?
couldn't he have ozonized?
couldn't we have ozonized?
couldn't you have ozonized?
couldn't they have ozonized? 	couldn't I have been ozonizing?
couldn't you have been ozonizing?
couldn't he have been ozonizing?
couldn't we have been ozonizing?
couldn't you have been ozonizing?
couldn't they have been ozonizing?