English verb conjugation
SHOULD REFEREE

Regular verb: referee - refereed - refereed

Affirmation

Simple form	V-ing form
I'd referee you'd referee he'd referee we'd referee you'd referee they'd referee	I'd be refereeing you'd be refereeing he'd be refereeing we'd be refereeing you'd be refereeing they'd be refereeing
Perfect	V-ing perfect
I should've refereed you should've refereed he should've refereed we should've refereed you should've refereed they should've refereed	I should've been refereeing you should've been refereeing he should've been refereeing we should've been refereeing you should've been refereeing they should've been refereeing

Negation

Simple form	V-ing form
I shouldn't referee you shouldn't referee he shouldn't referee we shouldn't referee you shouldn't referee they shouldn't referee	I shouldn't be refereeing you shouldn't be refereeing he shouldn't be refereeing we shouldn't be refereeing you shouldn't be refereeing they shouldn't be refereeing
Perfect	V-ing perfect
I shouldn't have refereed you shouldn't have refereed he shouldn't have refereed we shouldn't have refereed you shouldn't have refereed they shouldn't have refereed	I shouldn't have been refereeing you shouldn't have been refereeing he shouldn't have been refereeing we shouldn't have been refereeing you shouldn't have been refereeing they shouldn't have been refereeing

Interrogative form

Simple form	V-ing form
should I referee? should you referee? should he referee? should we referee? should you referee? should they referee?	should I be refereeing? should you be refereeing? should he be refereeing? should we be refereeing? should you be refereeing? should they be refereeing?
Perfect	V-ing perfect
should I have refereed? should you have refereed? should he have refereed? should we have refereed? should you have refereed? should they have refereed?	should I have been refereeing? should you have been refereeing? should he have been refereeing? should we have been refereeing? should you have been refereeing? should they have been refereeing?

Interro-negative form

Simple form	V-ing form
shouldn't I referee? shouldn't you referee? shouldn't he referee? shouldn't we referee? shouldn't you referee? shouldn't they referee?	shouldn't I be refereeing? shouldn't you be refereeing? shouldn't he be refereeing? shouldn't we be refereeing? shouldn't you be refereeing? shouldn't they be refereeing?
Perfect	V-ing perfect
shouldn't I have refereed? shouldn't you have refereed? shouldn't he have refereed? shouldn't we have refereed? shouldn't you have refereed? shouldn't they have refereed?	shouldn't I have been refereeing? shouldn't you have been refereeing? shouldn't he have been refereeing? shouldn't we have been refereeing? shouldn't you have been refereeing? shouldn't they have been refereeing?