I'd be superseding you'd be superseding she'd be superseding we'd be superseding you'd be superseding they'd be superseding
Perfect
I should've superseded you should've superseded she should've superseded we should've superseded you should've superseded they should've superseded
V-ing perfect
I should've been superseding you should've been superseding she should've been superseding we should've been superseding you should've been superseding they should've been superseding
Negation
Simple form
I shouldn't supersede you shouldn't supersede she shouldn't supersede we shouldn't supersede you shouldn't supersede they shouldn't supersede
V-ing form
I shouldn't be superseding you shouldn't be superseding she shouldn't be superseding we shouldn't be superseding you shouldn't be superseding they shouldn't be superseding
Perfect
I shouldn't have superseded you shouldn't have superseded she shouldn't have superseded we shouldn't have superseded you shouldn't have superseded they shouldn't have superseded
V-ing perfect
I shouldn't have been superseding you shouldn't have been superseding she shouldn't have been superseding we shouldn't have been superseding you shouldn't have been superseding they shouldn't have been superseding
Interrogative form
Simple form
should I supersede? should you supersede? should she supersede? should we supersede? should you supersede? should they supersede?
V-ing form
should I be superseding? should you be superseding? should she be superseding? should we be superseding? should you be superseding? should they be superseding?
Perfect
should I have superseded? should you have superseded? should she have superseded? should we have superseded? should you have superseded? should they have superseded?
V-ing perfect
should I have been superseding? should you have been superseding? should she have been superseding? should we have been superseding? should you have been superseding? should they have been superseding?
Interro-negative form
Simple form
shouldn't I supersede? shouldn't you supersede? shouldn't she supersede? shouldn't we supersede? shouldn't you supersede? shouldn't they supersede?
V-ing form
shouldn't I be superseding? shouldn't you be superseding? shouldn't she be superseding? shouldn't we be superseding? shouldn't you be superseding? shouldn't they be superseding?
Perfect
shouldn't I have superseded? shouldn't you have superseded? shouldn't she have superseded? shouldn't we have superseded? shouldn't you have superseded? shouldn't they have superseded?
V-ing perfect
shouldn't I have been superseding? shouldn't you have been superseding? shouldn't she have been superseding? shouldn't we have been superseding? shouldn't you have been superseding? shouldn't they have been superseding?