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