I'd be sifting you'd be sifting she'd be sifting we'd be sifting you'd be sifting they'd be sifting
Perfecto
I should've sifted you should've sifted she should've sifted we should've sifted you should've sifted they should've sifted
Perfecto con V-ing
I should've been sifting you should've been sifting she should've been sifting we should've been sifting you should've been sifting they should've been sifting
Negación
Forma simple
I shouldn't sift you shouldn't sift she shouldn't sift we shouldn't sift you shouldn't sift they shouldn't sift
Forma con V-ing
I shouldn't be sifting you shouldn't be sifting she shouldn't be sifting we shouldn't be sifting you shouldn't be sifting they shouldn't be sifting
Perfecto
I shouldn't have sifted you shouldn't have sifted she shouldn't have sifted we shouldn't have sifted you shouldn't have sifted they shouldn't have sifted
Perfecto con V-ing
I shouldn't have been sifting you shouldn't have been sifting she shouldn't have been sifting we shouldn't have been sifting you shouldn't have been sifting they shouldn't have been sifting
Forma interrogativa
Forma simple
should I sift? should you sift? should she sift? should we sift? should you sift? should they sift?
Forma con V-ing
should I be sifting? should you be sifting? should she be sifting? should we be sifting? should you be sifting? should they be sifting?
Perfecto
should I have sifted? should you have sifted? should she have sifted? should we have sifted? should you have sifted? should they have sifted?
Perfecto con V-ing
should I have been sifting? should you have been sifting? should she have been sifting? should we have been sifting? should you have been sifting? should they have been sifting?
Forma interro-negativa
Forma simple
shouldn't I sift? shouldn't you sift? shouldn't she sift? shouldn't we sift? shouldn't you sift? shouldn't they sift?
Forma con V-ing
shouldn't I be sifting? shouldn't you be sifting? shouldn't she be sifting? shouldn't we be sifting? shouldn't you be sifting? shouldn't they be sifting?
Perfecto
shouldn't I have sifted? shouldn't you have sifted? shouldn't she have sifted? shouldn't we have sifted? shouldn't you have sifted? shouldn't they have sifted?
Perfecto con V-ing
shouldn't I have been sifting? shouldn't you have been sifting? shouldn't she have been sifting? shouldn't we have been sifting? shouldn't you have been sifting? shouldn't they have been sifting?