must unshell
Verbo regular: unshell - unshelled- unshelled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must unshell
you must unshell
he must unshell
we must unshell
you must unshell
they must unshell 	I must be unshelling
you must be unshelling
he must be unshelling
we must be unshelling
you must be unshelling
they must be unshelling	I must have unshelled
you must have unshelled
he must have unshelled
we must have unshelled
you must have unshelled
they must have unshelled	I must have been unshelling
you must have been unshelling
he must have been unshelling
we must have been unshelling
you must have been unshelling
they must have been unshelling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not unshell
you must not unshell
he must not unshell
we must not unshell
you must not unshell
they must not unshell 	I must not be unshelling
you must not be unshelling
he must not be unshelling
we must not be unshelling
you must not be unshelling
they must not be unshelling	I must not have unshelled
you must not have unshelled
he must not have unshelled
we must not have unshelled
you must not have unshelled
they must not have unshelled	I must not have been unshelling
you must not have been unshelling
he must not have been unshelling
we must not have been unshelling
you must not have been unshelling
they must not have been unshelling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I unshell?
must you unshell?
must he unshell?
must we unshell?
must you unshell?
must they unshell? 	must I be unshelling?
must you be unshelling?
must he be unshelling?
must we be unshelling?
must you be unshelling?
must they be unshelling? 	must I have unshelled?
must you have unshelled?
must he have unshelled?
must we have unshelled?
must you have unshelled?
must they have unshelled? 	must I have been unshelling?
must you have been unshelling?
must he have been unshelling?
must we have been unshelling?
must you have been unshelling?
must they have been unshelling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not unshell?
must you not unshell?
must he not unshell?
must we not unshell?
must you not unshell?
must they not unshell? 	must I not be unshelling?
must you not be unshelling?
must he not be unshelling?
must we not be unshelling?
must you not be unshelling?
must they not be unshelling? 	must I not have unshelled?
must you not have unshelled?
must he not have unshelled?
must we not have unshelled?
must you not have unshelled?
must they not have unshelled? 	must I not have been unshelling?
must you not have been unshelling?
must he not have been unshelling?
must we not have been unshelling?
must you not have been unshelling?
must they not have been unshelling?