can bark
Verbo regular: bark - barked- barked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can bark
you can bark
he can bark
we can bark
you can bark
they can bark 	I can be barking
you can be barking
he can be barking
we can be barking
you can be barking
they can be barking	I can have barked
you can have barked
he can have barked
we can have barked
you can have barked
they can have barked	I can have been barking
you can have been barking
he can have been barking
we can have been barking
you can have been barking
they can have been barking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot bark
you cannot bark
he cannot bark
we cannot bark
you cannot bark
they cannot bark 	I cannot be barking
you cannot be barking
he cannot be barking
we cannot be barking
you cannot be barking
they cannot be barking	I cannot have barked
you cannot have barked
he cannot have barked
we cannot have barked
you cannot have barked
they cannot have barked	I cannot have been barking
you cannot have been barking
he cannot have been barking
we cannot have been barking
you cannot have been barking
they cannot have been barking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I bark?
can you bark?
can he bark?
can we bark?
can you bark?
can they bark? 	can I be barking?
can you be barking?
can he be barking?
can we be barking?
can you be barking?
can they be barking? 	can I have barked?
can you have barked?
can he have barked?
can we have barked?
can you have barked?
can they have barked? 	can I have been barking?
can you have been barking?
can he have been barking?
can we have been barking?
can you have been barking?
can they have been barking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not bark?
can you not bark?
can he not bark?
can we not bark?
can you not bark?
can they not bark? 	can I not be barking?
can you not be barking?
can he not be barking?
can we not be barking?
can you not be barking?
can they not be barking? 	can I not have barked?
can you not have barked?
can he not have barked?
can we not have barked?
can you not have barked?
can they not have barked? 	can I not have been barking?
can you not have been barking?
can he not have been barking?
can we not have been barking?
can you not have been barking?
can they not have been barking?