can refute
Verbo regular: refute - refuted- refuted

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