English verb conjugation CAN REFEREE

Regular verb: referee - refereed - refereed

Affirmation

Simple form

I can referee
you can referee
he can referee
we can referee
you can referee
they can referee

V-ing form

I can be refereeing
you can be refereeing
he can be refereeing
we can be refereeing
you can be refereeing
they can be refereeing

Perfect

I can have refereed
you can have refereed
he 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
he 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
he cannot referee
we cannot referee
you cannot referee
they cannot referee

V-ing form

I cannot be refereeing
you cannot be refereeing
he cannot be refereeing
we cannot be refereeing
you cannot be refereeing
they cannot be refereeing

Perfect

I cannot have refereed
you cannot have refereed
he 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
he 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 he referee?
can we referee?
can you referee?
can they referee?

V-ing form

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

Perfect

can I have refereed?
can you have refereed?
can he 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 he 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 he 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 he 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 he 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 he 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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