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