could revalidate
Verbo regular: revalidate - revalidated- revalidated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could revalidate
you could revalidate
he could revalidate
we could revalidate
you could revalidate
they could revalidate 	I could be revalidating
you could be revalidating
he could be revalidating
we could be revalidating
you could be revalidating
they could be revalidating	I could have revalidated
you could have revalidated
he could have revalidated
we could have revalidated
you could have revalidated
they could have revalidated	I could have been revalidating
you could have been revalidating
he could have been revalidating
we could have been revalidating
you could have been revalidating
they could have been revalidating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not revalidate
you could not revalidate
he could not revalidate
we could not revalidate
you could not revalidate
they could not revalidate 	I could not be revalidating
you could not be revalidating
he could not be revalidating
we could not be revalidating
you could not be revalidating
they could not be revalidating	I could not have revalidated
you could not have revalidated
he could not have revalidated
we could not have revalidated
you could not have revalidated
they could not have revalidated	I could not have been revalidating
you could not have been revalidating
he could not have been revalidating
we could not have been revalidating
you could not have been revalidating
they could not have been revalidating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I revalidate?
could you revalidate?
could he revalidate?
could we revalidate?
could you revalidate?
could they revalidate? 	could I be revalidating?
could you be revalidating?
could he be revalidating?
could we be revalidating?
could you be revalidating?
could they be revalidating? 	could I have revalidated?
could you have revalidated?
could he have revalidated?
could we have revalidated?
could you have revalidated?
could they have revalidated? 	could I have been revalidating?
could you have been revalidating?
could he have been revalidating?
could we have been revalidating?
could you have been revalidating?
could they have been revalidating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not revalidate?
could you not revalidate?
could he not revalidate?
could we not revalidate?
could you not revalidate?
could they not revalidate? 	could I not be revalidating?
could you not be revalidating?
could he not be revalidating?
could we not be revalidating?
could you not be revalidating?
could they not be revalidating? 	could I not have revalidated?
could you not have revalidated?
could he not have revalidated?
could we not have revalidated?
could you not have revalidated?
could they not have revalidated? 	could I not have been revalidating?
could you not have been revalidating?
could he not have been revalidating?
could we not have been revalidating?
could you not have been revalidating?
could they not have been revalidating?