could round
Verbo regular: round - rounded- rounded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could round
you could round
he could round
we could round
you could round
they could round 	I could be rounding
you could be rounding
he could be rounding
we could be rounding
you could be rounding
they could be rounding	I could have rounded
you could have rounded
he could have rounded
we could have rounded
you could have rounded
they could have rounded	I could have been rounding
you could have been rounding
he could have been rounding
we could have been rounding
you could have been rounding
they could have been rounding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not round
you could not round
he could not round
we could not round
you could not round
they could not round 	I could not be rounding
you could not be rounding
he could not be rounding
we could not be rounding
you could not be rounding
they could not be rounding	I could not have rounded
you could not have rounded
he could not have rounded
we could not have rounded
you could not have rounded
they could not have rounded	I could not have been rounding
you could not have been rounding
he could not have been rounding
we could not have been rounding
you could not have been rounding
they could not have been rounding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I round?
could you round?
could he round?
could we round?
could you round?
could they round? 	could I be rounding?
could you be rounding?
could he be rounding?
could we be rounding?
could you be rounding?
could they be rounding? 	could I have rounded?
could you have rounded?
could he have rounded?
could we have rounded?
could you have rounded?
could they have rounded? 	could I have been rounding?
could you have been rounding?
could he have been rounding?
could we have been rounding?
could you have been rounding?
could they have been rounding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not round?
could you not round?
could he not round?
could we not round?
could you not round?
could they not round? 	could I not be rounding?
could you not be rounding?
could he not be rounding?
could we not be rounding?
could you not be rounding?
could they not be rounding? 	could I not have rounded?
could you not have rounded?
could he not have rounded?
could we not have rounded?
could you not have rounded?
could they not have rounded? 	could I not have been rounding?
could you not have been rounding?
could he not have been rounding?
could we not have been rounding?
could you not have been rounding?
could they not have been rounding?