could unnail
Verbe régulier : unnail - unnailed- unnailed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could unnail
you could unnail
he could unnail
we could unnail
you could unnail
they could unnail 	I could be unnailing
you could be unnailing
he could be unnailing
we could be unnailing
you could be unnailing
they could be unnailing	I could have unnailed
you could have unnailed
he could have unnailed
we could have unnailed
you could have unnailed
they could have unnailed	I could have been unnailing
you could have been unnailing
he could have been unnailing
we could have been unnailing
you could have been unnailing
they could have been unnailing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not unnail
you could not unnail
he could not unnail
we could not unnail
you could not unnail
they could not unnail 	I could not be unnailing
you could not be unnailing
he could not be unnailing
we could not be unnailing
you could not be unnailing
they could not be unnailing	I could not have unnailed
you could not have unnailed
he could not have unnailed
we could not have unnailed
you could not have unnailed
they could not have unnailed	I could not have been unnailing
you could not have been unnailing
he could not have been unnailing
we could not have been unnailing
you could not have been unnailing
they could not have been unnailing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I unnail?
could you unnail?
could he unnail?
could we unnail?
could you unnail?
could they unnail? 	could I be unnailing?
could you be unnailing?
could he be unnailing?
could we be unnailing?
could you be unnailing?
could they be unnailing? 	could I have unnailed?
could you have unnailed?
could he have unnailed?
could we have unnailed?
could you have unnailed?
could they have unnailed? 	could I have been unnailing?
could you have been unnailing?
could he have been unnailing?
could we have been unnailing?
could you have been unnailing?
could they have been unnailing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not unnail?
could you not unnail?
could he not unnail?
could we not unnail?
could you not unnail?
could they not unnail? 	could I not be unnailing?
could you not be unnailing?
could he not be unnailing?
could we not be unnailing?
could you not be unnailing?
could they not be unnailing? 	could I not have unnailed?
could you not have unnailed?
could he not have unnailed?
could we not have unnailed?
could you not have unnailed?
could they not have unnailed? 	could I not have been unnailing?
could you not have been unnailing?
could he not have been unnailing?
could we not have been unnailing?
could you not have been unnailing?
could they not have been unnailing?