could stop
Verbo regular: stop - stopped- stopped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could stop
you could stop
she could stop
we could stop
you could stop
they could stop 	I could be stopping
you could be stopping
she could be stopping
we could be stopping
you could be stopping
they could be stopping	I could have stopped
you could have stopped
she could have stopped
we could have stopped
you could have stopped
they could have stopped	I could have been stopping
you could have been stopping
she could have been stopping
we could have been stopping
you could have been stopping
they could have been stopping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not stop
you could not stop
she could not stop
we could not stop
you could not stop
they could not stop 	I could not be stopping
you could not be stopping
she could not be stopping
we could not be stopping
you could not be stopping
they could not be stopping	I could not have stopped
you could not have stopped
she could not have stopped
we could not have stopped
you could not have stopped
they could not have stopped	I could not have been stopping
you could not have been stopping
she could not have been stopping
we could not have been stopping
you could not have been stopping
they could not have been stopping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I stop?
could you stop?
could she stop?
could we stop?
could you stop?
could they stop? 	could I be stopping?
could you be stopping?
could she be stopping?
could we be stopping?
could you be stopping?
could they be stopping? 	could I have stopped?
could you have stopped?
could she have stopped?
could we have stopped?
could you have stopped?
could they have stopped? 	could I have been stopping?
could you have been stopping?
could she have been stopping?
could we have been stopping?
could you have been stopping?
could they have been stopping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not stop?
could you not stop?
could she not stop?
could we not stop?
could you not stop?
could they not stop? 	could I not be stopping?
could you not be stopping?
could she not be stopping?
could we not be stopping?
could you not be stopping?
could they not be stopping? 	could I not have stopped?
could you not have stopped?
could she not have stopped?
could we not have stopped?
could you not have stopped?
could they not have stopped? 	could I not have been stopping?
could you not have been stopping?
could she not have been stopping?
could we not have been stopping?
could you not have been stopping?
could they not have been stopping?