English verb conjugation CAN REFUTE

Regular verb: refute - refuted - refuted

Affirmation

Simple form

I can refute
you can refute
he can refute
we can refute
you can refute
they can refute

V-ing form

I can be refuting
you can be refuting
he can be refuting
we can be refuting
you can be refuting
they can be refuting

Perfect

I can have refuted
you can have refuted
he can have refuted
we can have refuted
you can have refuted
they can have refuted

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

can I refute?
can you refute?
can he refute?
can we refute?
can you refute?
can they refute?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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