should decrease
Verbo regular: decrease - decreased- decreased

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should decrease
you should decrease
she should decrease
we should decrease
you should decrease
they should decrease 	I should be decreasing
you should be decreasing
she should be decreasing
we should be decreasing
you should be decreasing
they should be decreasing	I should have decreased
you should have decreased
she should have decreased
we should have decreased
you should have decreased
they should have decreased	I should have been decreasing
you should have been decreasing
she should have been decreasing
we should have been decreasing
you should have been decreasing
they should have been decreasing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not decrease
you should not decrease
she should not decrease
we should not decrease
you should not decrease
they should not decrease 	I should not be decreasing
you should not be decreasing
she should not be decreasing
we should not be decreasing
you should not be decreasing
they should not be decreasing	I should not have decreased
you should not have decreased
she should not have decreased
we should not have decreased
you should not have decreased
they should not have decreased	I should not have been decreasing
you should not have been decreasing
she should not have been decreasing
we should not have been decreasing
you should not have been decreasing
they should not have been decreasing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I decrease?
should you decrease?
should she decrease?
should we decrease?
should you decrease?
should they decrease? 	should I be decreasing?
should you be decreasing?
should she be decreasing?
should we be decreasing?
should you be decreasing?
should they be decreasing? 	should I have decreased?
should you have decreased?
should she have decreased?
should we have decreased?
should you have decreased?
should they have decreased? 	should I have been decreasing?
should you have been decreasing?
should she have been decreasing?
should we have been decreasing?
should you have been decreasing?
should they have been decreasing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not decrease?
should you not decrease?
should she not decrease?
should we not decrease?
should you not decrease?
should they not decrease? 	should I not be decreasing?
should you not be decreasing?
should she not be decreasing?
should we not be decreasing?
should you not be decreasing?
should they not be decreasing? 	should I not have decreased?
should you not have decreased?
should she not have decreased?
should we not have decreased?
should you not have decreased?
should they not have decreased? 	should I not have been decreasing?
should you not have been decreasing?
should she not have been decreasing?
should we not have been decreasing?
should you not have been decreasing?
should they not have been decreasing?