can exist
Verbo regular: exist - existed- existed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can exist
you can exist
he can exist
we can exist
you can exist
they can exist 	I can be existing
you can be existing
he can be existing
we can be existing
you can be existing
they can be existing	I can have existed
you can have existed
he can have existed
we can have existed
you can have existed
they can have existed	I can have been existing
you can have been existing
he can have been existing
we can have been existing
you can have been existing
they can have been existing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't exist
you can't exist
he can't exist
we can't exist
you can't exist
they can't exist 	I can't be existing
you can't be existing
he can't be existing
we can't be existing
you can't be existing
they can't be existing	I can't have existed
you can't have existed
he can't have existed
we can't have existed
you can't have existed
they can't have existed	I can't have been existing
you can't have been existing
he can't have been existing
we can't have been existing
you can't have been existing
they can't have been existing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I exist?
can you exist?
can he exist?
can we exist?
can you exist?
can they exist? 	can I be existing?
can you be existing?
can he be existing?
can we be existing?
can you be existing?
can they be existing? 	can I have existed?
can you have existed?
can he have existed?
can we have existed?
can you have existed?
can they have existed? 	can I have been existing?
can you have been existing?
can he have been existing?
can we have been existing?
can you have been existing?
can they have been existing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I exist?
can't you exist?
can't he exist?
can't we exist?
can't you exist?
can't they exist? 	can't I be existing?
can't you be existing?
can't he be existing?
can't we be existing?
can't you be existing?
can't they be existing? 	can't I have existed?
can't you have existed?
can't he have existed?
can't we have existed?
can't you have existed?
can't they have existed? 	can't I have been existing?
can't you have been existing?
can't he have been existing?
can't we have been existing?
can't you have been existing?
can't they have been existing?