can corroborate
Verbo regular: corroborate - corroborated- corroborated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can corroborate
you can corroborate
he can corroborate
we can corroborate
you can corroborate
they can corroborate 	I can be corroborating
you can be corroborating
he can be corroborating
we can be corroborating
you can be corroborating
they can be corroborating	I can have corroborated
you can have corroborated
he can have corroborated
we can have corroborated
you can have corroborated
they can have corroborated	I can have been corroborating
you can have been corroborating
he can have been corroborating
we can have been corroborating
you can have been corroborating
they can have been corroborating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't corroborate
you can't corroborate
he can't corroborate
we can't corroborate
you can't corroborate
they can't corroborate 	I can't be corroborating
you can't be corroborating
he can't be corroborating
we can't be corroborating
you can't be corroborating
they can't be corroborating	I can't have corroborated
you can't have corroborated
he can't have corroborated
we can't have corroborated
you can't have corroborated
they can't have corroborated	I can't have been corroborating
you can't have been corroborating
he can't have been corroborating
we can't have been corroborating
you can't have been corroborating
they can't have been corroborating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I corroborate?
can you corroborate?
can he corroborate?
can we corroborate?
can you corroborate?
can they corroborate? 	can I be corroborating?
can you be corroborating?
can he be corroborating?
can we be corroborating?
can you be corroborating?
can they be corroborating? 	can I have corroborated?
can you have corroborated?
can he have corroborated?
can we have corroborated?
can you have corroborated?
can they have corroborated? 	can I have been corroborating?
can you have been corroborating?
can he have been corroborating?
can we have been corroborating?
can you have been corroborating?
can they have been corroborating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I corroborate?
can't you corroborate?
can't he corroborate?
can't we corroborate?
can't you corroborate?
can't they corroborate? 	can't I be corroborating?
can't you be corroborating?
can't he be corroborating?
can't we be corroborating?
can't you be corroborating?
can't they be corroborating? 	can't I have corroborated?
can't you have corroborated?
can't he have corroborated?
can't we have corroborated?
can't you have corroborated?
can't they have corroborated? 	can't I have been corroborating?
can't you have been corroborating?
can't he have been corroborating?
can't we have been corroborating?
can't you have been corroborating?
can't they have been corroborating?