should alter
Verbo regular: alter - altered- altered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should alter
you should alter
she should alter
we should alter
you should alter
they should alter 	I should be altering
you should be altering
she should be altering
we should be altering
you should be altering
they should be altering	I should have altered
you should have altered
she should have altered
we should have altered
you should have altered
they should have altered	I should have been altering
you should have been altering
she should have been altering
we should have been altering
you should have been altering
they should have been altering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not alter
you should not alter
she should not alter
we should not alter
you should not alter
they should not alter 	I should not be altering
you should not be altering
she should not be altering
we should not be altering
you should not be altering
they should not be altering	I should not have altered
you should not have altered
she should not have altered
we should not have altered
you should not have altered
they should not have altered	I should not have been altering
you should not have been altering
she should not have been altering
we should not have been altering
you should not have been altering
they should not have been altering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I alter?
should you alter?
should she alter?
should we alter?
should you alter?
should they alter? 	should I be altering?
should you be altering?
should she be altering?
should we be altering?
should you be altering?
should they be altering? 	should I have altered?
should you have altered?
should she have altered?
should we have altered?
should you have altered?
should they have altered? 	should I have been altering?
should you have been altering?
should she have been altering?
should we have been altering?
should you have been altering?
should they have been altering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not alter?
should you not alter?
should she not alter?
should we not alter?
should you not alter?
should they not alter? 	should I not be altering?
should you not be altering?
should she not be altering?
should we not be altering?
should you not be altering?
should they not be altering? 	should I not have altered?
should you not have altered?
should she not have altered?
should we not have altered?
should you not have altered?
should they not have altered? 	should I not have been altering?
should you not have been altering?
should she not have been altering?
should we not have been altering?
should you not have been altering?
should they not have been altering?