English verb conjugation CAN REFEREE

Regular verb: referee - refereed - refereed

Affirmation

Simple form

I can referee
you can referee
she can referee
we can referee
you can referee
they can referee

V-ing form

I can be refereeing
you can be refereeing
she can be refereeing
we can be refereeing
you can be refereeing
they can be refereeing

Perfect

I can have refereed
you can have refereed
she can have refereed
we can have refereed
you can have refereed
they can have refereed

V-ing perfect

I can have been refereeing
you can have been refereeing
she can have been refereeing
we can have been refereeing
you can have been refereeing
they can have been refereeing

Negation

Simple form

I cannot referee
you cannot referee
she cannot referee
we cannot referee
you cannot referee
they cannot referee

V-ing form

I cannot be refereeing
you cannot be refereeing
she cannot be refereeing
we cannot be refereeing
you cannot be refereeing
they cannot be refereeing

Perfect

I cannot have refereed
you cannot have refereed
she cannot have refereed
we cannot have refereed
you cannot have refereed
they cannot have refereed

V-ing perfect

I cannot have been refereeing
you cannot have been refereeing
she cannot have been refereeing
we cannot have been refereeing
you cannot have been refereeing
they cannot have been refereeing

Interrogative form

Simple form

can I referee?
can you referee?
can she referee?
can we referee?
can you referee?
can they referee?

V-ing form

can I be refereeing?
can you be refereeing?
can she be refereeing?
can we be refereeing?
can you be refereeing?
can they be refereeing?

Perfect

can I have refereed?
can you have refereed?
can she have refereed?
can we have refereed?
can you have refereed?
can they have refereed?

V-ing perfect

can I have been refereeing?
can you have been refereeing?
can she have been refereeing?
can we have been refereeing?
can you have been refereeing?
can they have been refereeing?

Interro-negative form

Simple form

can I not referee?
can you not referee?
can she not referee?
can we not referee?
can you not referee?
can they not referee?

V-ing form

can I not be refereeing?
can you not be refereeing?
can she not be refereeing?
can we not be refereeing?
can you not be refereeing?
can they not be refereeing?

Perfect

can I not have refereed?
can you not have refereed?
can she not have refereed?
can we not have refereed?
can you not have refereed?
can they not have refereed?

V-ing perfect

can I not have been refereeing?
can you not have been refereeing?
can she not have been refereeing?
can we not have been refereeing?
can you not have been refereeing?
can they not have been refereeing?

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