could rive
Verbo irregular: rive - rived- rived, riven

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could rive
you could rive
he could rive
we could rive
you could rive
they could rive 	I could be riving
you could be riving
he could be riving
we could be riving
you could be riving
they could be riving	I could have rived, riven
you could have rived, riven
he could have rived, riven
we could have rived, riven
you could have rived, riven
they could have rived, riven	I could have been riving
you could have been riving
he could have been riving
we could have been riving
you could have been riving
they could have been riving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not rive
you could not rive
he could not rive
we could not rive
you could not rive
they could not rive 	I could not be riving
you could not be riving
he could not be riving
we could not be riving
you could not be riving
they could not be riving	I could not have rived, riven
you could not have rived, riven
he could not have rived, riven
we could not have rived, riven
you could not have rived, riven
they could not have rived, riven	I could not have been riving
you could not have been riving
he could not have been riving
we could not have been riving
you could not have been riving
they could not have been riving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I rive?
could you rive?
could he rive?
could we rive?
could you rive?
could they rive? 	could I be riving?
could you be riving?
could he be riving?
could we be riving?
could you be riving?
could they be riving? 	could I have rived, riven?
could you have rived, riven?
could he have rived, riven?
could we have rived, riven?
could you have rived, riven?
could they have rived, riven? 	could I have been riving?
could you have been riving?
could he have been riving?
could we have been riving?
could you have been riving?
could they have been riving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not rive?
could you not rive?
could he not rive?
could we not rive?
could you not rive?
could they not rive? 	could I not be riving?
could you not be riving?
could he not be riving?
could we not be riving?
could you not be riving?
could they not be riving? 	could I not have rived, riven?
could you not have rived, riven?
could he not have rived, riven?
could we not have rived, riven?
could you not have rived, riven?
could they not have rived, riven? 	could I not have been riving?
could you not have been riving?
could he not have been riving?
could we not have been riving?
could you not have been riving?
could they not have been riving?