English verb conjugation
MUST UNSHELL

Regular verb: unshell - unshelled - unshelled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
I mustn't unshell you mustn't unshell she mustn't unshell we mustn't unshell you mustn't unshell they mustn't unshell	I mustn't be unshelling you mustn't be unshelling she mustn't be unshelling we mustn't be unshelling you mustn't be unshelling they mustn't be unshelling
Perfect	V-ing perfect
I mustn't have unshelled you mustn't have unshelled she mustn't have unshelled we mustn't have unshelled you mustn't have unshelled they mustn't have unshelled	I mustn't have been unshelling you mustn't have been unshelling she mustn't have been unshelling we mustn't have been unshelling you mustn't have been unshelling they mustn't have been unshelling

Interrogative form

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

Interro-negative form

Simple form	V-ing form
mustn't I unshell? mustn't you unshell? mustn't she unshell? mustn't we unshell? mustn't you unshell? mustn't they unshell?	mustn't I be unshelling? mustn't you be unshelling? mustn't she be unshelling? mustn't we be unshelling? mustn't you be unshelling? mustn't they be unshelling?
Perfect	V-ing perfect
mustn't I have unshelled? mustn't you have unshelled? mustn't she have unshelled? mustn't we have unshelled? mustn't you have unshelled? mustn't they have unshelled?	mustn't I have been unshelling? mustn't you have been unshelling? mustn't she have been unshelling? mustn't we have been unshelling? mustn't you have been unshelling? mustn't they have been unshelling?