should exist
Verbo regular: exist - existed- existed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd exist
you'd exist
he'd exist
we'd exist
you'd exist
they'd exist 	I'd be existing
you'd be existing
he'd be existing
we'd be existing
you'd be existing
they'd be existing	I should've existed
you should've existed
he should've existed
we should've existed
you should've existed
they should've existed	I should've been existing
you should've been existing
he should've been existing
we should've been existing
you should've been existing
they should've been existing	

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

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

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