could sirup
Verbo regular: sirup - siruped- siruped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could sirup
you could sirup
he could sirup
we could sirup
you could sirup
they could sirup 	I could be siruping
you could be siruping
he could be siruping
we could be siruping
you could be siruping
they could be siruping	I could have siruped
you could have siruped
he could have siruped
we could have siruped
you could have siruped
they could have siruped	I could have been siruping
you could have been siruping
he could have been siruping
we could have been siruping
you could have been siruping
they could have been siruping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't sirup
you couldn't sirup
he couldn't sirup
we couldn't sirup
you couldn't sirup
they couldn't sirup 	I couldn't be siruping
you couldn't be siruping
he couldn't be siruping
we couldn't be siruping
you couldn't be siruping
they couldn't be siruping	I couldn't have siruped
you couldn't have siruped
he couldn't have siruped
we couldn't have siruped
you couldn't have siruped
they couldn't have siruped	I couldn't have been siruping
you couldn't have been siruping
he couldn't have been siruping
we couldn't have been siruping
you couldn't have been siruping
they couldn't have been siruping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I sirup?
could you sirup?
could he sirup?
could we sirup?
could you sirup?
could they sirup? 	could I be siruping?
could you be siruping?
could he be siruping?
could we be siruping?
could you be siruping?
could they be siruping? 	could I have siruped?
could you have siruped?
could he have siruped?
could we have siruped?
could you have siruped?
could they have siruped? 	could I have been siruping?
could you have been siruping?
could he have been siruping?
could we have been siruping?
could you have been siruping?
could they have been siruping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I sirup?
couldn't you sirup?
couldn't he sirup?
couldn't we sirup?
couldn't you sirup?
couldn't they sirup? 	couldn't I be siruping?
couldn't you be siruping?
couldn't he be siruping?
couldn't we be siruping?
couldn't you be siruping?
couldn't they be siruping? 	couldn't I have siruped?
couldn't you have siruped?
couldn't he have siruped?
couldn't we have siruped?
couldn't you have siruped?
couldn't they have siruped? 	couldn't I have been siruping?
couldn't you have been siruping?
couldn't he have been siruping?
couldn't we have been siruping?
couldn't you have been siruping?
couldn't they have been siruping?