could rumble
Verbo regular: rumble - rumbled- rumbled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could rumble
you could rumble
he could rumble
we could rumble
you could rumble
they could rumble 	I could be rumbling
you could be rumbling
he could be rumbling
we could be rumbling
you could be rumbling
they could be rumbling	I could have rumbled
you could have rumbled
he could have rumbled
we could have rumbled
you could have rumbled
they could have rumbled	I could have been rumbling
you could have been rumbling
he could have been rumbling
we could have been rumbling
you could have been rumbling
they could have been rumbling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not rumble
you could not rumble
he could not rumble
we could not rumble
you could not rumble
they could not rumble 	I could not be rumbling
you could not be rumbling
he could not be rumbling
we could not be rumbling
you could not be rumbling
they could not be rumbling	I could not have rumbled
you could not have rumbled
he could not have rumbled
we could not have rumbled
you could not have rumbled
they could not have rumbled	I could not have been rumbling
you could not have been rumbling
he could not have been rumbling
we could not have been rumbling
you could not have been rumbling
they could not have been rumbling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I rumble?
could you rumble?
could he rumble?
could we rumble?
could you rumble?
could they rumble? 	could I be rumbling?
could you be rumbling?
could he be rumbling?
could we be rumbling?
could you be rumbling?
could they be rumbling? 	could I have rumbled?
could you have rumbled?
could he have rumbled?
could we have rumbled?
could you have rumbled?
could they have rumbled? 	could I have been rumbling?
could you have been rumbling?
could he have been rumbling?
could we have been rumbling?
could you have been rumbling?
could they have been rumbling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not rumble?
could you not rumble?
could he not rumble?
could we not rumble?
could you not rumble?
could they not rumble? 	could I not be rumbling?
could you not be rumbling?
could he not be rumbling?
could we not be rumbling?
could you not be rumbling?
could they not be rumbling? 	could I not have rumbled?
could you not have rumbled?
could he not have rumbled?
could we not have rumbled?
could you not have rumbled?
could they not have rumbled? 	could I not have been rumbling?
could you not have been rumbling?
could he not have been rumbling?
could we not have been rumbling?
could you not have been rumbling?
could they not have been rumbling?