could remain
Verbo regular: remain - remained- remained

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could remain
you could remain
he could remain
we could remain
you could remain
they could remain 	I could be remaining
you could be remaining
he could be remaining
we could be remaining
you could be remaining
they could be remaining	I could have remained
you could have remained
he could have remained
we could have remained
you could have remained
they could have remained	I could have been remaining
you could have been remaining
he could have been remaining
we could have been remaining
you could have been remaining
they could have been remaining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not remain
you could not remain
he could not remain
we could not remain
you could not remain
they could not remain 	I could not be remaining
you could not be remaining
he could not be remaining
we could not be remaining
you could not be remaining
they could not be remaining	I could not have remained
you could not have remained
he could not have remained
we could not have remained
you could not have remained
they could not have remained	I could not have been remaining
you could not have been remaining
he could not have been remaining
we could not have been remaining
you could not have been remaining
they could not have been remaining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I remain?
could you remain?
could he remain?
could we remain?
could you remain?
could they remain? 	could I be remaining?
could you be remaining?
could he be remaining?
could we be remaining?
could you be remaining?
could they be remaining? 	could I have remained?
could you have remained?
could he have remained?
could we have remained?
could you have remained?
could they have remained? 	could I have been remaining?
could you have been remaining?
could he have been remaining?
could we have been remaining?
could you have been remaining?
could they have been remaining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not remain?
could you not remain?
could he not remain?
could we not remain?
could you not remain?
could they not remain? 	could I not be remaining?
could you not be remaining?
could he not be remaining?
could we not be remaining?
could you not be remaining?
could they not be remaining? 	could I not have remained?
could you not have remained?
could he not have remained?
could we not have remained?
could you not have remained?
could they not have remained? 	could I not have been remaining?
could you not have been remaining?
could he not have been remaining?
could we not have been remaining?
could you not have been remaining?
could they not have been remaining?