should use
Verbo regular: use - used- used

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd use
you'd use
he'd use
we'd use
you'd use
they'd use 	I'd be using
you'd be using
he'd be using
we'd be using
you'd be using
they'd be using	I should've used
you should've used
he should've used
we should've used
you should've used
they should've used	I should've been using
you should've been using
he should've been using
we should've been using
you should've been using
they should've been using	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't use
you shouldn't use
he shouldn't use
we shouldn't use
you shouldn't use
they shouldn't use 	I shouldn't be using
you shouldn't be using
he shouldn't be using
we shouldn't be using
you shouldn't be using
they shouldn't be using	I shouldn't have used
you shouldn't have used
he shouldn't have used
we shouldn't have used
you shouldn't have used
they shouldn't have used	I shouldn't have been using
you shouldn't have been using
he shouldn't have been using
we shouldn't have been using
you shouldn't have been using
they shouldn't have been using	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I use?
should you use?
should he use?
should we use?
should you use?
should they use? 	should I be using?
should you be using?
should he be using?
should we be using?
should you be using?
should they be using? 	should I have used?
should you have used?
should he have used?
should we have used?
should you have used?
should they have used? 	should I have been using?
should you have been using?
should he have been using?
should we have been using?
should you have been using?
should they have been using? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I use?
shouldn't you use?
shouldn't he use?
shouldn't we use?
shouldn't you use?
shouldn't they use? 	shouldn't I be using?
shouldn't you be using?
shouldn't he be using?
shouldn't we be using?
shouldn't you be using?
shouldn't they be using? 	shouldn't I have used?
shouldn't you have used?
shouldn't he have used?
shouldn't we have used?
shouldn't you have used?
shouldn't they have used? 	shouldn't I have been using?
shouldn't you have been using?
shouldn't he have been using?
shouldn't we have been using?
shouldn't you have been using?
shouldn't they have been using?