should subtract
Verbo regular: subtract - subtracted- subtracted

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

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not subtract
you should not subtract
he should not subtract
we should not subtract
you should not subtract
they should not subtract 	I should not be subtracting
you should not be subtracting
he should not be subtracting
we should not be subtracting
you should not be subtracting
they should not be subtracting	I should not have subtracted
you should not have subtracted
he should not have subtracted
we should not have subtracted
you should not have subtracted
they should not have subtracted	I should not have been subtracting
you should not have been subtracting
he should not have been subtracting
we should not have been subtracting
you should not have been subtracting
they should not 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 	
should I not subtract?
should you not subtract?
should he not subtract?
should we not subtract?
should you not subtract?
should they not subtract? 	should I not be subtracting?
should you not be subtracting?
should he not be subtracting?
should we not be subtracting?
should you not be subtracting?
should they not be subtracting? 	should I not have subtracted?
should you not have subtracted?
should he not have subtracted?
should we not have subtracted?
should you not have subtracted?
should they not have subtracted? 	should I not have been subtracting?
should you not have been subtracting?
should he not have been subtracting?
should we not have been subtracting?
should you not have been subtracting?
should they not have been subtracting?