I'd be understanding you'd be understanding he'd be understanding we'd be understanding you'd be understanding they'd be understanding
Perfect
I should've understood you should've understood he 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 he 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 he 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 he 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 he 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 he 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 he understand? should we understand? should you understand? should they understand?
Forme en 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?
Perfect
should I have understood? should you have understood? should he 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 he 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 he 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 he 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 he 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 he have been understanding? shouldn't we have been understanding? shouldn't you have been understanding? shouldn't they have been understanding?