could metalize
Regular verb: metalize - metalized- metalized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could metalize
you could metalize
he could metalize
we could metalize
you could metalize
they could metalize 	I could be metalizing
you could be metalizing
he could be metalizing
we could be metalizing
you could be metalizing
they could be metalizing	I could have metalized
you could have metalized
he could have metalized
we could have metalized
you could have metalized
they could have metalized	I could have been metalizing
you could have been metalizing
he could have been metalizing
we could have been metalizing
you could have been metalizing
they could have been metalizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't metalize
you couldn't metalize
he couldn't metalize
we couldn't metalize
you couldn't metalize
they couldn't metalize 	I couldn't be metalizing
you couldn't be metalizing
he couldn't be metalizing
we couldn't be metalizing
you couldn't be metalizing
they couldn't be metalizing	I couldn't have metalized
you couldn't have metalized
he couldn't have metalized
we couldn't have metalized
you couldn't have metalized
they couldn't have metalized	I couldn't have been metalizing
you couldn't have been metalizing
he couldn't have been metalizing
we couldn't have been metalizing
you couldn't have been metalizing
they couldn't have been metalizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I metalize?
could you metalize?
could he metalize?
could we metalize?
could you metalize?
could they metalize? 	could I be metalizing?
could you be metalizing?
could he be metalizing?
could we be metalizing?
could you be metalizing?
could they be metalizing? 	could I have metalized?
could you have metalized?
could he have metalized?
could we have metalized?
could you have metalized?
could they have metalized? 	could I have been metalizing?
could you have been metalizing?
could he have been metalizing?
could we have been metalizing?
could you have been metalizing?
could they have been metalizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I metalize?
couldn't you metalize?
couldn't he metalize?
couldn't we metalize?
couldn't you metalize?
couldn't they metalize? 	couldn't I be metalizing?
couldn't you be metalizing?
couldn't he be metalizing?
couldn't we be metalizing?
couldn't you be metalizing?
couldn't they be metalizing? 	couldn't I have metalized?
couldn't you have metalized?
couldn't he have metalized?
couldn't we have metalized?
couldn't you have metalized?
couldn't they have metalized? 	couldn't I have been metalizing?
couldn't you have been metalizing?
couldn't he have been metalizing?
couldn't we have been metalizing?
couldn't you have been metalizing?
couldn't they have been metalizing?