can know
Verbo irregular: know - knew- known

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can know
you can know
he can know
we can know
you can know
they can know 	I can be knowing
you can be knowing
he can be knowing
we can be knowing
you can be knowing
they can be knowing	I can have known
you can have known
he can have known
we can have known
you can have known
they can have known	I can have been knowing
you can have been knowing
he can have been knowing
we can have been knowing
you can have been knowing
they can have been knowing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't know
you can't know
he can't know
we can't know
you can't know
they can't know 	I can't be knowing
you can't be knowing
he can't be knowing
we can't be knowing
you can't be knowing
they can't be knowing	I can't have known
you can't have known
he can't have known
we can't have known
you can't have known
they can't have known	I can't have been knowing
you can't have been knowing
he can't have been knowing
we can't have been knowing
you can't have been knowing
they can't have been knowing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I know?
can you know?
can he know?
can we know?
can you know?
can they know? 	can I be knowing?
can you be knowing?
can he be knowing?
can we be knowing?
can you be knowing?
can they be knowing? 	can I have known?
can you have known?
can he have known?
can we have known?
can you have known?
can they have known? 	can I have been knowing?
can you have been knowing?
can he have been knowing?
can we have been knowing?
can you have been knowing?
can they have been knowing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can't I know?
can't you know?
can't he know?
can't we know?
can't you know?
can't they know? 	can't I be knowing?
can't you be knowing?
can't he be knowing?
can't we be knowing?
can't you be knowing?
can't they be knowing? 	can't I have known?
can't you have known?
can't he have known?
can't we have known?
can't you have known?
can't they have known? 	can't I have been knowing?
can't you have been knowing?
can't he have been knowing?
can't we have been knowing?
can't you have been knowing?
can't they have been knowing?