English verb conjugation
MUST UNSHIFT

Regular verb: unshift - unshifted - unshifted

Affirmation

Simple form	V-ing form
I must unshift you must unshift she must unshift we must unshift you must unshift they must unshift	I must be unshifting you must be unshifting she must be unshifting we must be unshifting you must be unshifting they must be unshifting
Perfect	V-ing perfect
I must have unshifted you must have unshifted she must have unshifted we must have unshifted you must have unshifted they must have unshifted	I must have been unshifting you must have been unshifting she must have been unshifting we must have been unshifting you must have been unshifting they must have been unshifting

Negation

Simple form	V-ing form
I must not unshift you must not unshift she must not unshift we must not unshift you must not unshift they must not unshift	I must not be unshifting you must not be unshifting she must not be unshifting we must not be unshifting you must not be unshifting they must not be unshifting
Perfect	V-ing perfect
I must not have unshifted you must not have unshifted she must not have unshifted we must not have unshifted you must not have unshifted they must not have unshifted	I must not have been unshifting you must not have been unshifting she must not have been unshifting we must not have been unshifting you must not have been unshifting they must not have been unshifting

Interrogative form

Simple form	V-ing form
must I unshift? must you unshift? must she unshift? must we unshift? must you unshift? must they unshift?	must I be unshifting? must you be unshifting? must she be unshifting? must we be unshifting? must you be unshifting? must they be unshifting?
Perfect	V-ing perfect
must I have unshifted? must you have unshifted? must she have unshifted? must we have unshifted? must you have unshifted? must they have unshifted?	must I have been unshifting? must you have been unshifting? must she have been unshifting? must we have been unshifting? must you have been unshifting? must they have been unshifting?

Interro-negative form

Simple form	V-ing form
must I not unshift? must you not unshift? must she not unshift? must we not unshift? must you not unshift? must they not unshift?	must I not be unshifting? must you not be unshifting? must she not be unshifting? must we not be unshifting? must you not be unshifting? must they not be unshifting?
Perfect	V-ing perfect
must I not have unshifted? must you not have unshifted? must she not have unshifted? must we not have unshifted? must you not have unshifted? must they not have unshifted?	must I not have been unshifting? must you not have been unshifting? must she not have been unshifting? must we not have been unshifting? must you not have been unshifting? must they not have been unshifting?