can howl
Verbo regular: howl - howled- howled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can howl
you can howl
he can howl
we can howl
you can howl
they can howl 	I can be howling
you can be howling
he can be howling
we can be howling
you can be howling
they can be howling	I can have howled
you can have howled
he can have howled
we can have howled
you can have howled
they can have howled	I can have been howling
you can have been howling
he can have been howling
we can have been howling
you can have been howling
they can have been howling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot howl
you cannot howl
he cannot howl
we cannot howl
you cannot howl
they cannot howl 	I cannot be howling
you cannot be howling
he cannot be howling
we cannot be howling
you cannot be howling
they cannot be howling	I cannot have howled
you cannot have howled
he cannot have howled
we cannot have howled
you cannot have howled
they cannot have howled	I cannot have been howling
you cannot have been howling
he cannot have been howling
we cannot have been howling
you cannot have been howling
they cannot have been howling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I howl?
can you howl?
can he howl?
can we howl?
can you howl?
can they howl? 	can I be howling?
can you be howling?
can he be howling?
can we be howling?
can you be howling?
can they be howling? 	can I have howled?
can you have howled?
can he have howled?
can we have howled?
can you have howled?
can they have howled? 	can I have been howling?
can you have been howling?
can he have been howling?
can we have been howling?
can you have been howling?
can they have been howling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not howl?
can you not howl?
can he not howl?
can we not howl?
can you not howl?
can they not howl? 	can I not be howling?
can you not be howling?
can he not be howling?
can we not be howling?
can you not be howling?
can they not be howling? 	can I not have howled?
can you not have howled?
can he not have howled?
can we not have howled?
can you not have howled?
can they not have howled? 	can I not have been howling?
can you not have been howling?
can he not have been howling?
can we not have been howling?
can you not have been howling?
can they not have been howling?