should substitute
Verbo regular: substitute - substituted- substituted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd substitute
you'd substitute
he'd substitute
we'd substitute
you'd substitute
they'd substitute 	I'd be substituting
you'd be substituting
he'd be substituting
we'd be substituting
you'd be substituting
they'd be substituting	I should've substituted
you should've substituted
he should've substituted
we should've substituted
you should've substituted
they should've substituted	I should've been substituting
you should've been substituting
he should've been substituting
we should've been substituting
you should've been substituting
they should've been substituting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't substitute
you shouldn't substitute
he shouldn't substitute
we shouldn't substitute
you shouldn't substitute
they shouldn't substitute 	I shouldn't be substituting
you shouldn't be substituting
he shouldn't be substituting
we shouldn't be substituting
you shouldn't be substituting
they shouldn't be substituting	I shouldn't have substituted
you shouldn't have substituted
he shouldn't have substituted
we shouldn't have substituted
you shouldn't have substituted
they shouldn't have substituted	I shouldn't have been substituting
you shouldn't have been substituting
he shouldn't have been substituting
we shouldn't have been substituting
you shouldn't have been substituting
they shouldn't have been substituting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I substitute?
should you substitute?
should he substitute?
should we substitute?
should you substitute?
should they substitute? 	should I be substituting?
should you be substituting?
should he be substituting?
should we be substituting?
should you be substituting?
should they be substituting? 	should I have substituted?
should you have substituted?
should he have substituted?
should we have substituted?
should you have substituted?
should they have substituted? 	should I have been substituting?
should you have been substituting?
should he have been substituting?
should we have been substituting?
should you have been substituting?
should they have been substituting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I substitute?
shouldn't you substitute?
shouldn't he substitute?
shouldn't we substitute?
shouldn't you substitute?
shouldn't they substitute? 	shouldn't I be substituting?
shouldn't you be substituting?
shouldn't he be substituting?
shouldn't we be substituting?
shouldn't you be substituting?
shouldn't they be substituting? 	shouldn't I have substituted?
shouldn't you have substituted?
shouldn't he have substituted?
shouldn't we have substituted?
shouldn't you have substituted?
shouldn't they have substituted? 	shouldn't I have been substituting?
shouldn't you have been substituting?
shouldn't he have been substituting?
shouldn't we have been substituting?
shouldn't you have been substituting?
shouldn't they have been substituting?