I should master you should master he should master we should master you should master they should master
V-ing form
I should be mastering you should be mastering he should be mastering we should be mastering you should be mastering they should be mastering
Perfect
I should have mastered you should have mastered he should have mastered we should have mastered you should have mastered they should have mastered
V-ing perfect
I should have been mastering you should have been mastering he should have been mastering we should have been mastering you should have been mastering they should have been mastering
Negation
Simple form
I should not master you should not master he should not master we should not master you should not master they should not master
V-ing form
I should not be mastering you should not be mastering he should not be mastering we should not be mastering you should not be mastering they should not be mastering
Perfect
I should not have mastered you should not have mastered he should not have mastered we should not have mastered you should not have mastered they should not have mastered
V-ing perfect
I should not have been mastering you should not have been mastering he should not have been mastering we should not have been mastering you should not have been mastering they should not 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
should I not master? should you not master? should he not master? should we not master? should you not master? should they not master?
V-ing form
should I not be mastering? should you not be mastering? should he not be mastering? should we not be mastering? should you not be mastering? should they not be mastering?
Perfect
should I not have mastered? should you not have mastered? should he not have mastered? should we not have mastered? should you not have mastered? should they not have mastered?
V-ing perfect
should I not have been mastering? should you not have been mastering? should he not have been mastering? should we not have been mastering? should you not have been mastering? should they not have been mastering?