could hack
Verbo regular: hack - hacked- hacked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could hack
you could hack
he could hack
we could hack
you could hack
they could hack 	I could be hacking
you could be hacking
he could be hacking
we could be hacking
you could be hacking
they could be hacking	I could have hacked
you could have hacked
he could have hacked
we could have hacked
you could have hacked
they could have hacked	I could have been hacking
you could have been hacking
he could have been hacking
we could have been hacking
you could have been hacking
they could have been hacking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not hack
you could not hack
he could not hack
we could not hack
you could not hack
they could not hack 	I could not be hacking
you could not be hacking
he could not be hacking
we could not be hacking
you could not be hacking
they could not be hacking	I could not have hacked
you could not have hacked
he could not have hacked
we could not have hacked
you could not have hacked
they could not have hacked	I could not have been hacking
you could not have been hacking
he could not have been hacking
we could not have been hacking
you could not have been hacking
they could not have been hacking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I hack?
could you hack?
could he hack?
could we hack?
could you hack?
could they hack? 	could I be hacking?
could you be hacking?
could he be hacking?
could we be hacking?
could you be hacking?
could they be hacking? 	could I have hacked?
could you have hacked?
could he have hacked?
could we have hacked?
could you have hacked?
could they have hacked? 	could I have been hacking?
could you have been hacking?
could he have been hacking?
could we have been hacking?
could you have been hacking?
could they have been hacking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not hack?
could you not hack?
could he not hack?
could we not hack?
could you not hack?
could they not hack? 	could I not be hacking?
could you not be hacking?
could he not be hacking?
could we not be hacking?
could you not be hacking?
could they not be hacking? 	could I not have hacked?
could you not have hacked?
could he not have hacked?
could we not have hacked?
could you not have hacked?
could they not have hacked? 	could I not have been hacking?
could you not have been hacking?
could he not have been hacking?
could we not have been hacking?
could you not have been hacking?
could they not have been hacking?