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