English verb conjugation
SHOULD MASTER

Regular verb: master - mastered - mastered

Affirmation

Simple form	V-ing form
I should master you should master he should master we should master you should master they should master	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
should I master? should you master? should he master? should we master? should you master? should they master?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?