could platinize
Regular verb: platinize - platinized- platinized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could platinize
you could platinize
he could platinize
we could platinize
you could platinize
they could platinize 	I could be platinizing
you could be platinizing
he could be platinizing
we could be platinizing
you could be platinizing
they could be platinizing	I could have platinized
you could have platinized
he could have platinized
we could have platinized
you could have platinized
they could have platinized	I could have been platinizing
you could have been platinizing
he could have been platinizing
we could have been platinizing
you could have been platinizing
they could have been platinizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't platinize
you couldn't platinize
he couldn't platinize
we couldn't platinize
you couldn't platinize
they couldn't platinize 	I couldn't be platinizing
you couldn't be platinizing
he couldn't be platinizing
we couldn't be platinizing
you couldn't be platinizing
they couldn't be platinizing	I couldn't have platinized
you couldn't have platinized
he couldn't have platinized
we couldn't have platinized
you couldn't have platinized
they couldn't have platinized	I couldn't have been platinizing
you couldn't have been platinizing
he couldn't have been platinizing
we couldn't have been platinizing
you couldn't have been platinizing
they couldn't have been platinizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I platinize?
could you platinize?
could he platinize?
could we platinize?
could you platinize?
could they platinize? 	could I be platinizing?
could you be platinizing?
could he be platinizing?
could we be platinizing?
could you be platinizing?
could they be platinizing? 	could I have platinized?
could you have platinized?
could he have platinized?
could we have platinized?
could you have platinized?
could they have platinized? 	could I have been platinizing?
could you have been platinizing?
could he have been platinizing?
could we have been platinizing?
could you have been platinizing?
could they have been platinizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I platinize?
couldn't you platinize?
couldn't he platinize?
couldn't we platinize?
couldn't you platinize?
couldn't they platinize? 	couldn't I be platinizing?
couldn't you be platinizing?
couldn't he be platinizing?
couldn't we be platinizing?
couldn't you be platinizing?
couldn't they be platinizing? 	couldn't I have platinized?
couldn't you have platinized?
couldn't he have platinized?
couldn't we have platinized?
couldn't you have platinized?
couldn't they have platinized? 	couldn't I have been platinizing?
couldn't you have been platinizing?
couldn't he have been platinizing?
couldn't we have been platinizing?
couldn't you have been platinizing?
couldn't they have been platinizing?