English verb conjugation CAN REF

Regular verb: ref - refed - refed

Affirmation

Simple form

I can ref
you can ref
he can ref
we can ref
you can ref
they can ref

V-ing form

I can be refing
you can be refing
he can be refing
we can be refing
you can be refing
they can be refing

Perfect

I can have refed
you can have refed
he can have refed
we can have refed
you can have refed
they can have refed

V-ing perfect

I can have been refing
you can have been refing
he can have been refing
we can have been refing
you can have been refing
they can have been refing

Negation

Simple form

I can't ref
you can't ref
he can't ref
we can't ref
you can't ref
they can't ref

V-ing form

I can't be refing
you can't be refing
he can't be refing
we can't be refing
you can't be refing
they can't be refing

Perfect

I can't have refed
you can't have refed
he can't have refed
we can't have refed
you can't have refed
they can't have refed

V-ing perfect

I can't have been refing
you can't have been refing
he can't have been refing
we can't have been refing
you can't have been refing
they can't have been refing

Interrogative form

Simple form

can I ref?
can you ref?
can he ref?
can we ref?
can you ref?
can they ref?

V-ing form

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

Perfect

can I have refed?
can you have refed?
can he have refed?
can we have refed?
can you have refed?
can they have refed?

V-ing perfect

can I have been refing?
can you have been refing?
can he have been refing?
can we have been refing?
can you have been refing?
can they have been refing?

Interro-negative form

Simple form

can't I ref?
can't you ref?
can't he ref?
can't we ref?
can't you ref?
can't they ref?

V-ing form

can't I be refing?
can't you be refing?
can't he be refing?
can't we be refing?
can't you be refing?
can't they be refing?

Perfect

can't I have refed?
can't you have refed?
can't he have refed?
can't we have refed?
can't you have refed?
can't they have refed?

V-ing perfect

can't I have been refing?
can't you have been refing?
can't he have been refing?
can't we have been refing?
can't you have been refing?
can't they have been refing?

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