must unnail
Verbo regular: unnail - unnailed- unnailed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must unnail
you must unnail
he must unnail
we must unnail
you must unnail
they must unnail 	I must be unnailing
you must be unnailing
he must be unnailing
we must be unnailing
you must be unnailing
they must be unnailing	I must have unnailed
you must have unnailed
he must have unnailed
we must have unnailed
you must have unnailed
they must have unnailed	I must have been unnailing
you must have been unnailing
he must have been unnailing
we must have been unnailing
you must have been unnailing
they must have been unnailing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not unnail
you must not unnail
he must not unnail
we must not unnail
you must not unnail
they must not unnail 	I must not be unnailing
you must not be unnailing
he must not be unnailing
we must not be unnailing
you must not be unnailing
they must not be unnailing	I must not have unnailed
you must not have unnailed
he must not have unnailed
we must not have unnailed
you must not have unnailed
they must not have unnailed	I must not have been unnailing
you must not have been unnailing
he must not have been unnailing
we must not have been unnailing
you must not have been unnailing
they must not have been unnailing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I unnail?
must you unnail?
must he unnail?
must we unnail?
must you unnail?
must they unnail? 	must I be unnailing?
must you be unnailing?
must he be unnailing?
must we be unnailing?
must you be unnailing?
must they be unnailing? 	must I have unnailed?
must you have unnailed?
must he have unnailed?
must we have unnailed?
must you have unnailed?
must they have unnailed? 	must I have been unnailing?
must you have been unnailing?
must he have been unnailing?
must we have been unnailing?
must you have been unnailing?
must they have been unnailing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not unnail?
must you not unnail?
must he not unnail?
must we not unnail?
must you not unnail?
must they not unnail? 	must I not be unnailing?
must you not be unnailing?
must he not be unnailing?
must we not be unnailing?
must you not be unnailing?
must they not be unnailing? 	must I not have unnailed?
must you not have unnailed?
must he not have unnailed?
must we not have unnailed?
must you not have unnailed?
must they not have unnailed? 	must I not have been unnailing?
must you not have been unnailing?
must he not have been unnailing?
must we not have been unnailing?
must you not have been unnailing?
must they not have been unnailing?