should zero
Verbo regular: zero - zeroed- zeroed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should zero
you should zero
she should zero
we should zero
you should zero
they should zero 	I should be zeroing
you should be zeroing
she should be zeroing
we should be zeroing
you should be zeroing
they should be zeroing	I should have zeroed
you should have zeroed
she should have zeroed
we should have zeroed
you should have zeroed
they should have zeroed	I should have been zeroing
you should have been zeroing
she should have been zeroing
we should have been zeroing
you should have been zeroing
they should have been zeroing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not zero
you should not zero
she should not zero
we should not zero
you should not zero
they should not zero 	I should not be zeroing
you should not be zeroing
she should not be zeroing
we should not be zeroing
you should not be zeroing
they should not be zeroing	I should not have zeroed
you should not have zeroed
she should not have zeroed
we should not have zeroed
you should not have zeroed
they should not have zeroed	I should not have been zeroing
you should not have been zeroing
she should not have been zeroing
we should not have been zeroing
you should not have been zeroing
they should not have been zeroing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I zero?
should you zero?
should she zero?
should we zero?
should you zero?
should they zero? 	should I be zeroing?
should you be zeroing?
should she be zeroing?
should we be zeroing?
should you be zeroing?
should they be zeroing? 	should I have zeroed?
should you have zeroed?
should she have zeroed?
should we have zeroed?
should you have zeroed?
should they have zeroed? 	should I have been zeroing?
should you have been zeroing?
should she have been zeroing?
should we have been zeroing?
should you have been zeroing?
should they have been zeroing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not zero?
should you not zero?
should she not zero?
should we not zero?
should you not zero?
should they not zero? 	should I not be zeroing?
should you not be zeroing?
should she not be zeroing?
should we not be zeroing?
should you not be zeroing?
should they not be zeroing? 	should I not have zeroed?
should you not have zeroed?
should she not have zeroed?
should we not have zeroed?
should you not have zeroed?
should they not have zeroed? 	should I not have been zeroing?
should you not have been zeroing?
should she not have been zeroing?
should we not have been zeroing?
should you not have been zeroing?
should they not have been zeroing?