I'd be certifying you'd be certifying he'd be certifying we'd be certifying you'd be certifying they'd be certifying
Perfect
I should've certified you should've certified he should've certified we should've certified you should've certified they should've certified
Perfect en V-ing
I should've been certifying you should've been certifying he should've been certifying we should've been certifying you should've been certifying they should've been certifying
Négation
Forme simple
I shouldn't certify you shouldn't certify he shouldn't certify we shouldn't certify you shouldn't certify they shouldn't certify
Forme en V-ing
I shouldn't be certifying you shouldn't be certifying he shouldn't be certifying we shouldn't be certifying you shouldn't be certifying they shouldn't be certifying
Perfect
I shouldn't have certified you shouldn't have certified he shouldn't have certified we shouldn't have certified you shouldn't have certified they shouldn't have certified
Perfect en V-ing
I shouldn't have been certifying you shouldn't have been certifying he shouldn't have been certifying we shouldn't have been certifying you shouldn't have been certifying they shouldn't have been certifying
Forme interrogative
Forme simple
should I certify? should you certify? should he certify? should we certify? should you certify? should they certify?
Forme en V-ing
should I be certifying? should you be certifying? should he be certifying? should we be certifying? should you be certifying? should they be certifying?
Perfect
should I have certified? should you have certified? should he have certified? should we have certified? should you have certified? should they have certified?
Perfect en V-ing
should I have been certifying? should you have been certifying? should he have been certifying? should we have been certifying? should you have been certifying? should they have been certifying?
Forme interro-négative
Forme simple
shouldn't I certify? shouldn't you certify? shouldn't he certify? shouldn't we certify? shouldn't you certify? shouldn't they certify?
Forme en V-ing
shouldn't I be certifying? shouldn't you be certifying? shouldn't he be certifying? shouldn't we be certifying? shouldn't you be certifying? shouldn't they be certifying?
Perfect
shouldn't I have certified? shouldn't you have certified? shouldn't he have certified? shouldn't we have certified? shouldn't you have certified? shouldn't they have certified?
Perfect en V-ing
shouldn't I have been certifying? shouldn't you have been certifying? shouldn't he have been certifying? shouldn't we have been certifying? shouldn't you have been certifying? shouldn't they have been certifying?