could falsify
Verbo regular: falsify - falsified- falsified

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could falsify
you could falsify
he could falsify
we could falsify
you could falsify
they could falsify 	I could be falsifying
you could be falsifying
he could be falsifying
we could be falsifying
you could be falsifying
they could be falsifying	I could have falsified
you could have falsified
he could have falsified
we could have falsified
you could have falsified
they could have falsified	I could have been falsifying
you could have been falsifying
he could have been falsifying
we could have been falsifying
you could have been falsifying
they could have been falsifying	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not falsify
you could not falsify
he could not falsify
we could not falsify
you could not falsify
they could not falsify 	I could not be falsifying
you could not be falsifying
he could not be falsifying
we could not be falsifying
you could not be falsifying
they could not be falsifying	I could not have falsified
you could not have falsified
he could not have falsified
we could not have falsified
you could not have falsified
they could not have falsified	I could not have been falsifying
you could not have been falsifying
he could not have been falsifying
we could not have been falsifying
you could not have been falsifying
they could not have been falsifying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I falsify?
could you falsify?
could he falsify?
could we falsify?
could you falsify?
could they falsify? 	could I be falsifying?
could you be falsifying?
could he be falsifying?
could we be falsifying?
could you be falsifying?
could they be falsifying? 	could I have falsified?
could you have falsified?
could he have falsified?
could we have falsified?
could you have falsified?
could they have falsified? 	could I have been falsifying?
could you have been falsifying?
could he have been falsifying?
could we have been falsifying?
could you have been falsifying?
could they have been falsifying? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not falsify?
could you not falsify?
could he not falsify?
could we not falsify?
could you not falsify?
could they not falsify? 	could I not be falsifying?
could you not be falsifying?
could he not be falsifying?
could we not be falsifying?
could you not be falsifying?
could they not be falsifying? 	could I not have falsified?
could you not have falsified?
could he not have falsified?
could we not have falsified?
could you not have falsified?
could they not have falsified? 	could I not have been falsifying?
could you not have been falsifying?
could he not have been falsifying?
could we not have been falsifying?
could you not have been falsifying?
could they not have been falsifying?