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