English verb conjugation
MUST BUTT

Regular verb: butt - butted - butted

Affirmation

Simple form	V-ing form
I must butt you must butt he must butt we must butt you must butt they must butt	I must be butting you must be butting he must be butting we must be butting you must be butting they must be butting
Perfect	V-ing perfect
I must have butted you must have butted he must have butted we must have butted you must have butted they must have butted	I must have been butting you must have been butting he must have been butting we must have been butting you must have been butting they must have been butting

Negation

Simple form	V-ing form
I must not butt you must not butt he must not butt we must not butt you must not butt they must not butt	I must not be butting you must not be butting he must not be butting we must not be butting you must not be butting they must not be butting
Perfect	V-ing perfect
I must not have butted you must not have butted he must not have butted we must not have butted you must not have butted they must not have butted	I must not have been butting you must not have been butting he must not have been butting we must not have been butting you must not have been butting they must not have been butting

Interrogative form

Simple form	V-ing form
must I butt? must you butt? must he butt? must we butt? must you butt? must they butt?	must I be butting? must you be butting? must he be butting? must we be butting? must you be butting? must they be butting?
Perfect	V-ing perfect
must I have butted? must you have butted? must he have butted? must we have butted? must you have butted? must they have butted?	must I have been butting? must you have been butting? must he have been butting? must we have been butting? must you have been butting? must they have been butting?

Interro-negative form

Simple form	V-ing form
must I not butt? must you not butt? must he not butt? must we not butt? must you not butt? must they not butt?	must I not be butting? must you not be butting? must he not be butting? must we not be butting? must you not be butting? must they not be butting?
Perfect	V-ing perfect
must I not have butted? must you not have butted? must he not have butted? must we not have butted? must you not have butted? must they not have butted?	must I not have been butting? must you not have been butting? must he not have been butting? must we not have been butting? must you not have been butting? must they not have been butting?