should referee
Regular verb: referee - refereed- refereed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not referee
you should not referee
he should not referee
we should not referee
you should not referee
they should not referee 	I should not be refereeing
you should not be refereeing
he should not be refereeing
we should not be refereeing
you should not be refereeing
they should not be refereeing	I should not have refereed
you should not have refereed
he should not have refereed
we should not have refereed
you should not have refereed
they should not have refereed	I should not have been refereeing
you should not have been refereeing
he should not have been refereeing
we should not have been refereeing
you should not have been refereeing
they should not have been refereeing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
should I not referee?
should you not referee?
should he not referee?
should we not referee?
should you not referee?
should they not referee? 	should I not be refereeing?
should you not be refereeing?
should he not be refereeing?
should we not be refereeing?
should you not be refereeing?
should they not be refereeing? 	should I not have refereed?
should you not have refereed?
should he not have refereed?
should we not have refereed?
should you not have refereed?
should they not have refereed? 	should I not have been refereeing?
should you not have been refereeing?
should he not have been refereeing?
should we not have been refereeing?
should you not have been refereeing?
should they not have been refereeing?