must unshell
Verbo regular: unshell - unshelled- unshelled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must unshell
you must unshell
she must unshell
we must unshell
you must unshell
they must unshell 	I must be unshelling
you must be unshelling
she must be unshelling
we must be unshelling
you must be unshelling
they must be unshelling	I must have unshelled
you must have unshelled
she 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
she must have been unshelling
we must have been unshelling
you must have been unshelling
they must have been unshelling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not unshell
you must not unshell
she 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
she 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
she 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
she 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 com V-ing 	Perfeito 	Perfeito com V-ing 	
must I unshell?
must you unshell?
must she unshell?
must we unshell?
must you unshell?
must they unshell? 	must I be unshelling?
must you be unshelling?
must she be unshelling?
must we be unshelling?
must you be unshelling?
must they be unshelling? 	must I have unshelled?
must you have unshelled?
must she 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 she have been unshelling?
must we have been unshelling?
must you have been unshelling?
must they have been unshelling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not unshell?
must you not unshell?
must she 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 she 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 she 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 she not have been unshelling?
must we not have been unshelling?
must you not have been unshelling?
must they not have been unshelling?