English verb conjugation
MUST GRUNT

Regular verb: grunt - grunted - grunted

Affirmation

Simple form	V-ing form
I must grunt you must grunt he must grunt we must grunt you must grunt they must grunt	I must be grunting you must be grunting he must be grunting we must be grunting you must be grunting they must be grunting
Perfect	V-ing perfect
I must have grunted you must have grunted he must have grunted we must have grunted you must have grunted they must have grunted	I must have been grunting you must have been grunting he must have been grunting we must have been grunting you must have been grunting they must have been grunting

Negation

Simple form	V-ing form
I must not grunt you must not grunt he must not grunt we must not grunt you must not grunt they must not grunt	I must not be grunting you must not be grunting he must not be grunting we must not be grunting you must not be grunting they must not be grunting
Perfect	V-ing perfect
I must not have grunted you must not have grunted he must not have grunted we must not have grunted you must not have grunted they must not have grunted	I must not have been grunting you must not have been grunting he must not have been grunting we must not have been grunting you must not have been grunting they must not have been grunting

Interrogative form

Simple form	V-ing form
must I grunt? must you grunt? must he grunt? must we grunt? must you grunt? must they grunt?	must I be grunting? must you be grunting? must he be grunting? must we be grunting? must you be grunting? must they be grunting?
Perfect	V-ing perfect
must I have grunted? must you have grunted? must he have grunted? must we have grunted? must you have grunted? must they have grunted?	must I have been grunting? must you have been grunting? must he have been grunting? must we have been grunting? must you have been grunting? must they have been grunting?

Interro-negative form

Simple form	V-ing form
must I not grunt? must you not grunt? must he not grunt? must we not grunt? must you not grunt? must they not grunt?	must I not be grunting? must you not be grunting? must he not be grunting? must we not be grunting? must you not be grunting? must they not be grunting?
Perfect	V-ing perfect
must I not have grunted? must you not have grunted? must he not have grunted? must we not have grunted? must you not have grunted? must they not have grunted?	must I not have been grunting? must you not have been grunting? must he not have been grunting? must we not have been grunting? must you not have been grunting? must they not have been grunting?