could factor
Verbo regular: factor - factored- factored

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could factor
you could factor
she could factor
we could factor
you could factor
they could factor 	I could be factoring
you could be factoring
she could be factoring
we could be factoring
you could be factoring
they could be factoring	I could have factored
you could have factored
she could have factored
we could have factored
you could have factored
they could have factored	I could have been factoring
you could have been factoring
she could have been factoring
we could have been factoring
you could have been factoring
they could have been factoring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not factor
you could not factor
she could not factor
we could not factor
you could not factor
they could not factor 	I could not be factoring
you could not be factoring
she could not be factoring
we could not be factoring
you could not be factoring
they could not be factoring	I could not have factored
you could not have factored
she could not have factored
we could not have factored
you could not have factored
they could not have factored	I could not have been factoring
you could not have been factoring
she could not have been factoring
we could not have been factoring
you could not have been factoring
they could not have been factoring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I factor?
could you factor?
could she factor?
could we factor?
could you factor?
could they factor? 	could I be factoring?
could you be factoring?
could she be factoring?
could we be factoring?
could you be factoring?
could they be factoring? 	could I have factored?
could you have factored?
could she have factored?
could we have factored?
could you have factored?
could they have factored? 	could I have been factoring?
could you have been factoring?
could she have been factoring?
could we have been factoring?
could you have been factoring?
could they have been factoring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not factor?
could you not factor?
could she not factor?
could we not factor?
could you not factor?
could they not factor? 	could I not be factoring?
could you not be factoring?
could she not be factoring?
could we not be factoring?
could you not be factoring?
could they not be factoring? 	could I not have factored?
could you not have factored?
could she not have factored?
could we not have factored?
could you not have factored?
could they not have factored? 	could I not have been factoring?
could you not have been factoring?
could she not have been factoring?
could we not have been factoring?
could you not have been factoring?
could they not have been factoring?