could ozonise
Regular verb: ozonise - ozonised- ozonised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could ozonise
you could ozonise
he could ozonise
we could ozonise
you could ozonise
they could ozonise 	I could be ozonising
you could be ozonising
he could be ozonising
we could be ozonising
you could be ozonising
they could be ozonising	I could have ozonised
you could have ozonised
he could have ozonised
we could have ozonised
you could have ozonised
they could have ozonised	I could have been ozonising
you could have been ozonising
he could have been ozonising
we could have been ozonising
you could have been ozonising
they could have been ozonising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not ozonise
you could not ozonise
he could not ozonise
we could not ozonise
you could not ozonise
they could not ozonise 	I could not be ozonising
you could not be ozonising
he could not be ozonising
we could not be ozonising
you could not be ozonising
they could not be ozonising	I could not have ozonised
you could not have ozonised
he could not have ozonised
we could not have ozonised
you could not have ozonised
they could not have ozonised	I could not have been ozonising
you could not have been ozonising
he could not have been ozonising
we could not have been ozonising
you could not have been ozonising
they could not have been ozonising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I ozonise?
could you ozonise?
could he ozonise?
could we ozonise?
could you ozonise?
could they ozonise? 	could I be ozonising?
could you be ozonising?
could he be ozonising?
could we be ozonising?
could you be ozonising?
could they be ozonising? 	could I have ozonised?
could you have ozonised?
could he have ozonised?
could we have ozonised?
could you have ozonised?
could they have ozonised? 	could I have been ozonising?
could you have been ozonising?
could he have been ozonising?
could we have been ozonising?
could you have been ozonising?
could they have been ozonising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not ozonise?
could you not ozonise?
could he not ozonise?
could we not ozonise?
could you not ozonise?
could they not ozonise? 	could I not be ozonising?
could you not be ozonising?
could he not be ozonising?
could we not be ozonising?
could you not be ozonising?
could they not be ozonising? 	could I not have ozonised?
could you not have ozonised?
could he not have ozonised?
could we not have ozonised?
could you not have ozonised?
could they not have ozonised? 	could I not have been ozonising?
could you not have been ozonising?
could he not have been ozonising?
could we not have been ozonising?
could you not have been ozonising?
could they not have been ozonising?