should subtract
Verbo regular: subtract - subtracted- subtracted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd subtract
you'd subtract
he'd subtract
we'd subtract
you'd subtract
they'd subtract 	I'd be subtracting
you'd be subtracting
he'd be subtracting
we'd be subtracting
you'd be subtracting
they'd be subtracting	I should've subtracted
you should've subtracted
he should've subtracted
we should've subtracted
you should've subtracted
they should've subtracted	I should've been subtracting
you should've been subtracting
he should've been subtracting
we should've been subtracting
you should've been subtracting
they should've been subtracting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't subtract
you shouldn't subtract
he shouldn't subtract
we shouldn't subtract
you shouldn't subtract
they shouldn't subtract 	I shouldn't be subtracting
you shouldn't be subtracting
he shouldn't be subtracting
we shouldn't be subtracting
you shouldn't be subtracting
they shouldn't be subtracting	I shouldn't have subtracted
you shouldn't have subtracted
he shouldn't have subtracted
we shouldn't have subtracted
you shouldn't have subtracted
they shouldn't have subtracted	I shouldn't have been subtracting
you shouldn't have been subtracting
he shouldn't have been subtracting
we shouldn't have been subtracting
you shouldn't have been subtracting
they shouldn't have been subtracting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I subtract?
should you subtract?
should he subtract?
should we subtract?
should you subtract?
should they subtract? 	should I be subtracting?
should you be subtracting?
should he be subtracting?
should we be subtracting?
should you be subtracting?
should they be subtracting? 	should I have subtracted?
should you have subtracted?
should he have subtracted?
should we have subtracted?
should you have subtracted?
should they have subtracted? 	should I have been subtracting?
should you have been subtracting?
should he have been subtracting?
should we have been subtracting?
should you have been subtracting?
should they have been subtracting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I subtract?
shouldn't you subtract?
shouldn't he subtract?
shouldn't we subtract?
shouldn't you subtract?
shouldn't they subtract? 	shouldn't I be subtracting?
shouldn't you be subtracting?
shouldn't he be subtracting?
shouldn't we be subtracting?
shouldn't you be subtracting?
shouldn't they be subtracting? 	shouldn't I have subtracted?
shouldn't you have subtracted?
shouldn't he have subtracted?
shouldn't we have subtracted?
shouldn't you have subtracted?
shouldn't they have subtracted? 	shouldn't I have been subtracting?
shouldn't you have been subtracting?
shouldn't he have been subtracting?
shouldn't we have been subtracting?
shouldn't you have been subtracting?
shouldn't they have been subtracting?