could saber
Verbo regular: saber - sabered- sabered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could saber
you could saber
he could saber
we could saber
you could saber
they could saber 	I could be sabering
you could be sabering
he could be sabering
we could be sabering
you could be sabering
they could be sabering	I could have sabered
you could have sabered
he could have sabered
we could have sabered
you could have sabered
they could have sabered	I could have been sabering
you could have been sabering
he could have been sabering
we could have been sabering
you could have been sabering
they could have been sabering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't saber
you couldn't saber
he couldn't saber
we couldn't saber
you couldn't saber
they couldn't saber 	I couldn't be sabering
you couldn't be sabering
he couldn't be sabering
we couldn't be sabering
you couldn't be sabering
they couldn't be sabering	I couldn't have sabered
you couldn't have sabered
he couldn't have sabered
we couldn't have sabered
you couldn't have sabered
they couldn't have sabered	I couldn't have been sabering
you couldn't have been sabering
he couldn't have been sabering
we couldn't have been sabering
you couldn't have been sabering
they couldn't have been sabering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I saber?
could you saber?
could he saber?
could we saber?
could you saber?
could they saber? 	could I be sabering?
could you be sabering?
could he be sabering?
could we be sabering?
could you be sabering?
could they be sabering? 	could I have sabered?
could you have sabered?
could he have sabered?
could we have sabered?
could you have sabered?
could they have sabered? 	could I have been sabering?
could you have been sabering?
could he have been sabering?
could we have been sabering?
could you have been sabering?
could they have been sabering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I saber?
couldn't you saber?
couldn't he saber?
couldn't we saber?
couldn't you saber?
couldn't they saber? 	couldn't I be sabering?
couldn't you be sabering?
couldn't he be sabering?
couldn't we be sabering?
couldn't you be sabering?
couldn't they be sabering? 	couldn't I have sabered?
couldn't you have sabered?
couldn't he have sabered?
couldn't we have sabered?
couldn't you have sabered?
couldn't they have sabered? 	couldn't I have been sabering?
couldn't you have been sabering?
couldn't he have been sabering?
couldn't we have been sabering?
couldn't you have been sabering?
couldn't they have been sabering?