I can refute you can refute he can refute we can refute you can refute they can refute
Forma con V-ing
I can be refuting you can be refuting he can be refuting we can be refuting you can be refuting they can be refuting
Perfecto
I can have refuted you can have refuted he can have refuted we can have refuted you can have refuted they can have refuted
Perfecto con V-ing
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
Negación
Forma simple
I can't refute you can't refute he can't refute we can't refute you can't refute they can't refute
Forma con V-ing
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
Perfecto
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
Perfecto con V-ing
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
Forma interrogativa
Forma simple
can I refute? can you refute? can he refute? can we refute? can you refute? can they refute?
Forma con V-ing
can I be refuting? can you be refuting? can he be refuting? can we be refuting? can you be refuting? can they be refuting?
Perfecto
can I have refuted? can you have refuted? can he have refuted? can we have refuted? can you have refuted? can they have refuted?
Perfecto con V-ing
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?
Forma interro-negativa
Forma simple
can't I refute? can't you refute? can't he refute? can't we refute? can't you refute? can't they refute?
Forma con V-ing
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?
Perfecto
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?
Perfecto con V-ing
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?