English verb conjugation
SHOULD PREVAIL

Regular verb: prevail - prevailed - prevailed

Affirmation

Simple form	V-ing form
I'd prevail you'd prevail he'd prevail we'd prevail you'd prevail they'd prevail	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
should I prevail? should you prevail? should he prevail? should we prevail? should you prevail? should they prevail?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?