I'd be understanding you'd be understanding she'd be understanding we'd be understanding you'd be understanding they'd be understanding
Perfect
I should've understood you should've understood she should've understood we should've understood you should've understood they should've understood
Perfect en V-ing
I should've been understanding you should've been understanding she should've been understanding we should've been understanding you should've been understanding they should've been understanding
Négation
Forme simple
I shouldn't understand you shouldn't understand she shouldn't understand we shouldn't understand you shouldn't understand they shouldn't understand
Forme en V-ing
I shouldn't be understanding you shouldn't be understanding she shouldn't be understanding we shouldn't be understanding you shouldn't be understanding they shouldn't be understanding
Perfect
I shouldn't have understood you shouldn't have understood she shouldn't have understood we shouldn't have understood you shouldn't have understood they shouldn't have understood
Perfect en V-ing
I shouldn't have been understanding you shouldn't have been understanding she shouldn't have been understanding we shouldn't have been understanding you shouldn't have been understanding they shouldn't have been understanding
Forme interrogative
Forme simple
should I understand? should you understand? should she understand? should we understand? should you understand? should they understand?
Forme en V-ing
should I be understanding? should you be understanding? should she be understanding? should we be understanding? should you be understanding? should they be understanding?
Perfect
should I have understood? should you have understood? should she have understood? should we have understood? should you have understood? should they have understood?
Perfect en V-ing
should I have been understanding? should you have been understanding? should she have been understanding? should we have been understanding? should you have been understanding? should they have been understanding?
Forme interro-négative
Forme simple
shouldn't I understand? shouldn't you understand? shouldn't she understand? shouldn't we understand? shouldn't you understand? shouldn't they understand?
Forme en V-ing
shouldn't I be understanding? shouldn't you be understanding? shouldn't she be understanding? shouldn't we be understanding? shouldn't you be understanding? shouldn't they be understanding?
Perfect
shouldn't I have understood? shouldn't you have understood? shouldn't she have understood? shouldn't we have understood? shouldn't you have understood? shouldn't they have understood?
Perfect en V-ing
shouldn't I have been understanding? shouldn't you have been understanding? shouldn't she have been understanding? shouldn't we have been understanding? shouldn't you have been understanding? shouldn't they have been understanding?