I'd be stacking you'd be stacking he'd be stacking we'd be stacking you'd be stacking they'd be stacking
Perfecto
I should've stacked you should've stacked he should've stacked we should've stacked you should've stacked they should've stacked
Perfecto con V-ing
I should've been stacking you should've been stacking he should've been stacking we should've been stacking you should've been stacking they should've been stacking
Negación
Forma simple
I shouldn't stack you shouldn't stack he shouldn't stack we shouldn't stack you shouldn't stack they shouldn't stack
Forma con V-ing
I shouldn't be stacking you shouldn't be stacking he shouldn't be stacking we shouldn't be stacking you shouldn't be stacking they shouldn't be stacking
Perfecto
I shouldn't have stacked you shouldn't have stacked he shouldn't have stacked we shouldn't have stacked you shouldn't have stacked they shouldn't have stacked
Perfecto con V-ing
I shouldn't have been stacking you shouldn't have been stacking he shouldn't have been stacking we shouldn't have been stacking you shouldn't have been stacking they shouldn't have been stacking
Forma interrogativa
Forma simple
should I stack? should you stack? should he stack? should we stack? should you stack? should they stack?
Forma con V-ing
should I be stacking? should you be stacking? should he be stacking? should we be stacking? should you be stacking? should they be stacking?
Perfecto
should I have stacked? should you have stacked? should he have stacked? should we have stacked? should you have stacked? should they have stacked?
Perfecto con V-ing
should I have been stacking? should you have been stacking? should he have been stacking? should we have been stacking? should you have been stacking? should they have been stacking?
Forma interro-negativa
Forma simple
shouldn't I stack? shouldn't you stack? shouldn't he stack? shouldn't we stack? shouldn't you stack? shouldn't they stack?
Forma con V-ing
shouldn't I be stacking? shouldn't you be stacking? shouldn't he be stacking? shouldn't we be stacking? shouldn't you be stacking? shouldn't they be stacking?
Perfecto
shouldn't I have stacked? shouldn't you have stacked? shouldn't he have stacked? shouldn't we have stacked? shouldn't you have stacked? shouldn't they have stacked?
Perfecto con V-ing
shouldn't I have been stacking? shouldn't you have been stacking? shouldn't he have been stacking? shouldn't we have been stacking? shouldn't you have been stacking? shouldn't they have been stacking?