ought to know
Verbo irregular: know - knew- known

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought to know
you ought to know
he ought to know
we ought to know
you ought to know
they ought to know 	I ought to be knowing
you ought to be knowing
he ought to be knowing
we ought to be knowing
you ought to be knowing
they ought to be knowing	I ought to have known
you ought to have known
he ought to have known
we ought to have known
you ought to have known
they ought to have known	I ought to have been knowing
you ought to have been knowing
he ought to have been knowing
we ought to have been knowing
you ought to have been knowing
they ought to have been knowing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought not to know
you ought not to know
he ought not to know
we ought not to know
you ought not to know
they ought not to know 	I ought not to knowing
you ought not to knowing
he ought not to knowing
we ought not to knowing
you ought not to knowing
they ought not to knowing	I ought not to have known
you ought not to have known
he ought not to have known
we ought not to have known
you ought not to have known
they ought not to have known	I ought not to have been knowing
you ought not to have been knowing
he ought not to have been knowing
we ought not to have been knowing
you ought not to have been knowing
they ought not to have been knowing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought to I know?
ought to you know?
ought to he know?
ought to we know?
ought to you know?
ought to they know? 	ought to I be knowing?
ought to you be knowing?
ought to he be knowing?
ought to we be knowing?
ought to you be knowing?
ought to they be knowing? 	ought to I have known?
ought to you have known?
ought to he have known?
ought to we have known?
ought to you have known?
ought to they have known? 	ought to I have been knowing?
ought to you have been knowing?
ought to he have been knowing?
ought to we have been knowing?
ought to you have been knowing?
ought to they have been knowing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought I not to know?
ought you not to know?
ought he not to know?
ought we not to know?
ought you not to know?
ought they not to know? 	ought I not to be knowing?
ought you not to be knowing?
ought he not to be knowing?
ought we not to be knowing?
ought you not to be knowing?
ought they not to be knowing? 	ought I not to have known?
ought you not to have known?
ought he not to have known?
ought we not to have known?
ought you not to have known?
ought they not to have known? 	ought I not to have been knowing?
ought you not to have been knowing?
ought he not to have been knowing?
ought we not to have been knowing?
ought you not to have been knowing?
ought they not to have been knowing?