could revise
Verbo regular: revise - revised- revised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could revise
you could revise
he could revise
we could revise
you could revise
they could revise 	I could be revising
you could be revising
he could be revising
we could be revising
you could be revising
they could be revising	I could have revised
you could have revised
he could have revised
we could have revised
you could have revised
they could have revised	I could have been revising
you could have been revising
he could have been revising
we could have been revising
you could have been revising
they could have been revising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not revise
you could not revise
he could not revise
we could not revise
you could not revise
they could not revise 	I could not be revising
you could not be revising
he could not be revising
we could not be revising
you could not be revising
they could not be revising	I could not have revised
you could not have revised
he could not have revised
we could not have revised
you could not have revised
they could not have revised	I could not have been revising
you could not have been revising
he could not have been revising
we could not have been revising
you could not have been revising
they could not have been revising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I revise?
could you revise?
could he revise?
could we revise?
could you revise?
could they revise? 	could I be revising?
could you be revising?
could he be revising?
could we be revising?
could you be revising?
could they be revising? 	could I have revised?
could you have revised?
could he have revised?
could we have revised?
could you have revised?
could they have revised? 	could I have been revising?
could you have been revising?
could he have been revising?
could we have been revising?
could you have been revising?
could they have been revising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not revise?
could you not revise?
could he not revise?
could we not revise?
could you not revise?
could they not revise? 	could I not be revising?
could you not be revising?
could he not be revising?
could we not be revising?
could you not be revising?
could they not be revising? 	could I not have revised?
could you not have revised?
could he not have revised?
could we not have revised?
could you not have revised?
could they not have revised? 	could I not have been revising?
could you not have been revising?
could he not have been revising?
could we not have been revising?
could you not have been revising?
could they not have been revising?