could naturalize
Verbo regular: naturalize - naturalized- naturalized

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could naturalize
you could naturalize
he could naturalize
we could naturalize
you could naturalize
they could naturalize 	I could be naturalizing
you could be naturalizing
he could be naturalizing
we could be naturalizing
you could be naturalizing
they could be naturalizing	I could have naturalized
you could have naturalized
he could have naturalized
we could have naturalized
you could have naturalized
they could have naturalized	I could have been naturalizing
you could have been naturalizing
he could have been naturalizing
we could have been naturalizing
you could have been naturalizing
they could have been naturalizing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't naturalize
you couldn't naturalize
he couldn't naturalize
we couldn't naturalize
you couldn't naturalize
they couldn't naturalize 	I couldn't be naturalizing
you couldn't be naturalizing
he couldn't be naturalizing
we couldn't be naturalizing
you couldn't be naturalizing
they couldn't be naturalizing	I couldn't have naturalized
you couldn't have naturalized
he couldn't have naturalized
we couldn't have naturalized
you couldn't have naturalized
they couldn't have naturalized	I couldn't have been naturalizing
you couldn't have been naturalizing
he couldn't have been naturalizing
we couldn't have been naturalizing
you couldn't have been naturalizing
they couldn't have been naturalizing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I naturalize?
could you naturalize?
could he naturalize?
could we naturalize?
could you naturalize?
could they naturalize? 	could I be naturalizing?
could you be naturalizing?
could he be naturalizing?
could we be naturalizing?
could you be naturalizing?
could they be naturalizing? 	could I have naturalized?
could you have naturalized?
could he have naturalized?
could we have naturalized?
could you have naturalized?
could they have naturalized? 	could I have been naturalizing?
could you have been naturalizing?
could he have been naturalizing?
could we have been naturalizing?
could you have been naturalizing?
could they have been naturalizing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I naturalize?
couldn't you naturalize?
couldn't he naturalize?
couldn't we naturalize?
couldn't you naturalize?
couldn't they naturalize? 	couldn't I be naturalizing?
couldn't you be naturalizing?
couldn't he be naturalizing?
couldn't we be naturalizing?
couldn't you be naturalizing?
couldn't they be naturalizing? 	couldn't I have naturalized?
couldn't you have naturalized?
couldn't he have naturalized?
couldn't we have naturalized?
couldn't you have naturalized?
couldn't they have naturalized? 	couldn't I have been naturalizing?
couldn't you have been naturalizing?
couldn't he have been naturalizing?
couldn't we have been naturalizing?
couldn't you have been naturalizing?
couldn't they have been naturalizing?