should change
Verbo regular: change - changed- changed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd change
you'd change
he'd change
we'd change
you'd change
they'd change 	I'd be changing
you'd be changing
he'd be changing
we'd be changing
you'd be changing
they'd be changing	I should've changed
you should've changed
he should've changed
we should've changed
you should've changed
they should've changed	I should've been changing
you should've been changing
he should've been changing
we should've been changing
you should've been changing
they should've been changing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't change
you shouldn't change
he shouldn't change
we shouldn't change
you shouldn't change
they shouldn't change 	I shouldn't be changing
you shouldn't be changing
he shouldn't be changing
we shouldn't be changing
you shouldn't be changing
they shouldn't be changing	I shouldn't have changed
you shouldn't have changed
he shouldn't have changed
we shouldn't have changed
you shouldn't have changed
they shouldn't have changed	I shouldn't have been changing
you shouldn't have been changing
he shouldn't have been changing
we shouldn't have been changing
you shouldn't have been changing
they shouldn't have been changing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I change?
should you change?
should he change?
should we change?
should you change?
should they change? 	should I be changing?
should you be changing?
should he be changing?
should we be changing?
should you be changing?
should they be changing? 	should I have changed?
should you have changed?
should he have changed?
should we have changed?
should you have changed?
should they have changed? 	should I have been changing?
should you have been changing?
should he have been changing?
should we have been changing?
should you have been changing?
should they have been changing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I change?
shouldn't you change?
shouldn't he change?
shouldn't we change?
shouldn't you change?
shouldn't they change? 	shouldn't I be changing?
shouldn't you be changing?
shouldn't he be changing?
shouldn't we be changing?
shouldn't you be changing?
shouldn't they be changing? 	shouldn't I have changed?
shouldn't you have changed?
shouldn't he have changed?
shouldn't we have changed?
shouldn't you have changed?
shouldn't they have changed? 	shouldn't I have been changing?
shouldn't you have been changing?
shouldn't he have been changing?
shouldn't we have been changing?
shouldn't you have been changing?
shouldn't they have been changing?