should study
Verbo regular: study - studied- studied

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd study
you'd study
she'd study
we'd study
you'd study
they'd study 	I'd be studying
you'd be studying
she'd be studying
we'd be studying
you'd be studying
they'd be studying	I should've studied
you should've studied
she should've studied
we should've studied
you should've studied
they should've studied	I should've been studying
you should've been studying
she should've been studying
we should've been studying
you should've been studying
they should've been studying	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't study
you shouldn't study
she shouldn't study
we shouldn't study
you shouldn't study
they shouldn't study 	I shouldn't be studying
you shouldn't be studying
she shouldn't be studying
we shouldn't be studying
you shouldn't be studying
they shouldn't be studying	I shouldn't have studied
you shouldn't have studied
she shouldn't have studied
we shouldn't have studied
you shouldn't have studied
they shouldn't have studied	I shouldn't have been studying
you shouldn't have been studying
she shouldn't have been studying
we shouldn't have been studying
you shouldn't have been studying
they shouldn't have been studying	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I study?
should you study?
should she study?
should we study?
should you study?
should they study? 	should I be studying?
should you be studying?
should she be studying?
should we be studying?
should you be studying?
should they be studying? 	should I have studied?
should you have studied?
should she have studied?
should we have studied?
should you have studied?
should they have studied? 	should I have been studying?
should you have been studying?
should she have been studying?
should we have been studying?
should you have been studying?
should they have been studying? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I study?
shouldn't you study?
shouldn't she study?
shouldn't we study?
shouldn't you study?
shouldn't they study? 	shouldn't I be studying?
shouldn't you be studying?
shouldn't she be studying?
shouldn't we be studying?
shouldn't you be studying?
shouldn't they be studying? 	shouldn't I have studied?
shouldn't you have studied?
shouldn't she have studied?
shouldn't we have studied?
shouldn't you have studied?
shouldn't they have studied? 	shouldn't I have been studying?
shouldn't you have been studying?
shouldn't she have been studying?
shouldn't we have been studying?
shouldn't you have been studying?
shouldn't they have been studying?