could ret
Verbo regular: ret - retted- retted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could ret
you could ret
he could ret
we could ret
you could ret
they could ret 	I could be retting
you could be retting
he could be retting
we could be retting
you could be retting
they could be retting	I could have retted
you could have retted
he could have retted
we could have retted
you could have retted
they could have retted	I could have been retting
you could have been retting
he could have been retting
we could have been retting
you could have been retting
they could have been retting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not ret
you could not ret
he could not ret
we could not ret
you could not ret
they could not ret 	I could not be retting
you could not be retting
he could not be retting
we could not be retting
you could not be retting
they could not be retting	I could not have retted
you could not have retted
he could not have retted
we could not have retted
you could not have retted
they could not have retted	I could not have been retting
you could not have been retting
he could not have been retting
we could not have been retting
you could not have been retting
they could not have been retting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I ret?
could you ret?
could he ret?
could we ret?
could you ret?
could they ret? 	could I be retting?
could you be retting?
could he be retting?
could we be retting?
could you be retting?
could they be retting? 	could I have retted?
could you have retted?
could he have retted?
could we have retted?
could you have retted?
could they have retted? 	could I have been retting?
could you have been retting?
could he have been retting?
could we have been retting?
could you have been retting?
could they have been retting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not ret?
could you not ret?
could he not ret?
could we not ret?
could you not ret?
could they not ret? 	could I not be retting?
could you not be retting?
could he not be retting?
could we not be retting?
could you not be retting?
could they not be retting? 	could I not have retted?
could you not have retted?
could he not have retted?
could we not have retted?
could you not have retted?
could they not have retted? 	could I not have been retting?
could you not have been retting?
could he not have been retting?
could we not have been retting?
could you not have been retting?
could they not have been retting?