English verb conjugation
MUST UNSHELL

Regular verb: unshell - unshelled - unshelled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?