English verb conjugation
MUST GRIFT

Regular verb: grift - grifted - grifted

Affirmation

Simple form	V-ing form
I must grift you must grift she must grift we must grift you must grift they must grift	I must be grifting you must be grifting she must be grifting we must be grifting you must be grifting they must be grifting
Perfect	V-ing perfect
I must have grifted you must have grifted she must have grifted we must have grifted you must have grifted they must have grifted	I must have been grifting you must have been grifting she must have been grifting we must have been grifting you must have been grifting they must have been grifting

Negation

Simple form	V-ing form
I must not grift you must not grift she must not grift we must not grift you must not grift they must not grift	I must not be grifting you must not be grifting she must not be grifting we must not be grifting you must not be grifting they must not be grifting
Perfect	V-ing perfect
I must not have grifted you must not have grifted she must not have grifted we must not have grifted you must not have grifted they must not have grifted	I must not have been grifting you must not have been grifting she must not have been grifting we must not have been grifting you must not have been grifting they must not have been grifting

Interrogative form

Simple form	V-ing form
must I grift? must you grift? must she grift? must we grift? must you grift? must they grift?	must I be grifting? must you be grifting? must she be grifting? must we be grifting? must you be grifting? must they be grifting?
Perfect	V-ing perfect
must I have grifted? must you have grifted? must she have grifted? must we have grifted? must you have grifted? must they have grifted?	must I have been grifting? must you have been grifting? must she have been grifting? must we have been grifting? must you have been grifting? must they have been grifting?

Interro-negative form

Simple form	V-ing form
must I not grift? must you not grift? must she not grift? must we not grift? must you not grift? must they not grift?	must I not be grifting? must you not be grifting? must she not be grifting? must we not be grifting? must you not be grifting? must they not be grifting?
Perfect	V-ing perfect
must I not have grifted? must you not have grifted? must she not have grifted? must we not have grifted? must you not have grifted? must they not have grifted?	must I not have been grifting? must you not have been grifting? must she not have been grifting? must we not have been grifting? must you not have been grifting? must they not have been grifting?