I'd be prevailing you'd be prevailing he'd be prevailing we'd be prevailing you'd be prevailing they'd be prevailing
Perfect
I should've prevailed you should've prevailed he should've prevailed we should've prevailed you should've prevailed they should've prevailed
V-ing perfect
I should've been prevailing you should've been prevailing he should've been prevailing we should've been prevailing you should've been prevailing they should've been prevailing
Negation
Simple form
I shouldn't prevail you shouldn't prevail he shouldn't prevail we shouldn't prevail you shouldn't prevail they shouldn't prevail
V-ing form
I shouldn't be prevailing you shouldn't be prevailing he shouldn't be prevailing we shouldn't be prevailing you shouldn't be prevailing they shouldn't be prevailing
Perfect
I shouldn't have prevailed you shouldn't have prevailed he shouldn't have prevailed we shouldn't have prevailed you shouldn't have prevailed they shouldn't have prevailed
V-ing perfect
I shouldn't have been prevailing you shouldn't have been prevailing he shouldn't have been prevailing we shouldn't have been prevailing you shouldn't have been prevailing they shouldn't have been prevailing
Interrogative form
Simple form
should I prevail? should you prevail? should he prevail? should we prevail? should you prevail? should they prevail?
V-ing form
should I be prevailing? should you be prevailing? should he be prevailing? should we be prevailing? should you be prevailing? should they be prevailing?
Perfect
should I have prevailed? should you have prevailed? should he have prevailed? should we have prevailed? should you have prevailed? should they have prevailed?
V-ing perfect
should I have been prevailing? should you have been prevailing? should he have been prevailing? should we have been prevailing? should you have been prevailing? should they have been prevailing?
Interro-negative form
Simple form
shouldn't I prevail? shouldn't you prevail? shouldn't he prevail? shouldn't we prevail? shouldn't you prevail? shouldn't they prevail?
V-ing form
shouldn't I be prevailing? shouldn't you be prevailing? shouldn't he be prevailing? shouldn't we be prevailing? shouldn't you be prevailing? shouldn't they be prevailing?
Perfect
shouldn't I have prevailed? shouldn't you have prevailed? shouldn't he have prevailed? shouldn't we have prevailed? shouldn't you have prevailed? shouldn't they have prevailed?
V-ing perfect
shouldn't I have been prevailing? shouldn't you have been prevailing? shouldn't he have been prevailing? shouldn't we have been prevailing? shouldn't you have been prevailing? shouldn't they have been prevailing?