could ring
Verbo irregular: ring - rang- rung

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could ring
you could ring
she could ring
we could ring
you could ring
they could ring 	I could be ringing
you could be ringing
she could be ringing
we could be ringing
you could be ringing
they could be ringing	I could have rung
you could have rung
she could have rung
we could have rung
you could have rung
they could have rung	I could have been ringing
you could have been ringing
she could have been ringing
we could have been ringing
you could have been ringing
they could have been ringing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not ring
you could not ring
she could not ring
we could not ring
you could not ring
they could not ring 	I could not be ringing
you could not be ringing
she could not be ringing
we could not be ringing
you could not be ringing
they could not be ringing	I could not have rung
you could not have rung
she could not have rung
we could not have rung
you could not have rung
they could not have rung	I could not have been ringing
you could not have been ringing
she could not have been ringing
we could not have been ringing
you could not have been ringing
they could not have been ringing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I ring?
could you ring?
could she ring?
could we ring?
could you ring?
could they ring? 	could I be ringing?
could you be ringing?
could she be ringing?
could we be ringing?
could you be ringing?
could they be ringing? 	could I have rung?
could you have rung?
could she have rung?
could we have rung?
could you have rung?
could they have rung? 	could I have been ringing?
could you have been ringing?
could she have been ringing?
could we have been ringing?
could you have been ringing?
could they have been ringing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not ring?
could you not ring?
could she not ring?
could we not ring?
could you not ring?
could they not ring? 	could I not be ringing?
could you not be ringing?
could she not be ringing?
could we not be ringing?
could you not be ringing?
could they not be ringing? 	could I not have rung?
could you not have rung?
could she not have rung?
could we not have rung?
could you not have rung?
could they not have rung? 	could I not have been ringing?
could you not have been ringing?
could she not have been ringing?
could we not have been ringing?
could you not have been ringing?
could they not have been ringing?