could pluralize
Regular verb: pluralize - pluralized- pluralized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could pluralize
you could pluralize
he could pluralize
we could pluralize
you could pluralize
they could pluralize 	I could be pluralizing
you could be pluralizing
he could be pluralizing
we could be pluralizing
you could be pluralizing
they could be pluralizing	I could have pluralized
you could have pluralized
he could have pluralized
we could have pluralized
you could have pluralized
they could have pluralized	I could have been pluralizing
you could have been pluralizing
he could have been pluralizing
we could have been pluralizing
you could have been pluralizing
they could have been pluralizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't pluralize
you couldn't pluralize
he couldn't pluralize
we couldn't pluralize
you couldn't pluralize
they couldn't pluralize 	I couldn't be pluralizing
you couldn't be pluralizing
he couldn't be pluralizing
we couldn't be pluralizing
you couldn't be pluralizing
they couldn't be pluralizing	I couldn't have pluralized
you couldn't have pluralized
he couldn't have pluralized
we couldn't have pluralized
you couldn't have pluralized
they couldn't have pluralized	I couldn't have been pluralizing
you couldn't have been pluralizing
he couldn't have been pluralizing
we couldn't have been pluralizing
you couldn't have been pluralizing
they couldn't have been pluralizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I pluralize?
could you pluralize?
could he pluralize?
could we pluralize?
could you pluralize?
could they pluralize? 	could I be pluralizing?
could you be pluralizing?
could he be pluralizing?
could we be pluralizing?
could you be pluralizing?
could they be pluralizing? 	could I have pluralized?
could you have pluralized?
could he have pluralized?
could we have pluralized?
could you have pluralized?
could they have pluralized? 	could I have been pluralizing?
could you have been pluralizing?
could he have been pluralizing?
could we have been pluralizing?
could you have been pluralizing?
could they have been pluralizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I pluralize?
couldn't you pluralize?
couldn't he pluralize?
couldn't we pluralize?
couldn't you pluralize?
couldn't they pluralize? 	couldn't I be pluralizing?
couldn't you be pluralizing?
couldn't he be pluralizing?
couldn't we be pluralizing?
couldn't you be pluralizing?
couldn't they be pluralizing? 	couldn't I have pluralized?
couldn't you have pluralized?
couldn't he have pluralized?
couldn't we have pluralized?
couldn't you have pluralized?
couldn't they have pluralized? 	couldn't I have been pluralizing?
couldn't you have been pluralizing?
couldn't he have been pluralizing?
couldn't we have been pluralizing?
couldn't you have been pluralizing?
couldn't they have been pluralizing?