English verb conjugation
MUST BROWN

Regular verb: brown - browned - browned

Affirmation

Simple form	V-ing form
I must brown you must brown she must brown we must brown you must brown they must brown	I must be browning you must be browning she must be browning we must be browning you must be browning they must be browning
Perfect	V-ing perfect
I must have browned you must have browned she must have browned we must have browned you must have browned they must have browned	I must have been browning you must have been browning she must have been browning we must have been browning you must have been browning they must have been browning

Negation

Simple form	V-ing form
I must not brown you must not brown she must not brown we must not brown you must not brown they must not brown	I must not be browning you must not be browning she must not be browning we must not be browning you must not be browning they must not be browning
Perfect	V-ing perfect
I must not have browned you must not have browned she must not have browned we must not have browned you must not have browned they must not have browned	I must not have been browning you must not have been browning she must not have been browning we must not have been browning you must not have been browning they must not have been browning

Interrogative form

Simple form	V-ing form
must I brown? must you brown? must she brown? must we brown? must you brown? must they brown?	must I be browning? must you be browning? must she be browning? must we be browning? must you be browning? must they be browning?
Perfect	V-ing perfect
must I have browned? must you have browned? must she have browned? must we have browned? must you have browned? must they have browned?	must I have been browning? must you have been browning? must she have been browning? must we have been browning? must you have been browning? must they have been browning?

Interro-negative form

Simple form	V-ing form
must I not brown? must you not brown? must she not brown? must we not brown? must you not brown? must they not brown?	must I not be browning? must you not be browning? must she not be browning? must we not be browning? must you not be browning? must they not be browning?
Perfect	V-ing perfect
must I not have browned? must you not have browned? must she not have browned? must we not have browned? must you not have browned? must they not have browned?	must I not have been browning? must you not have been browning? must she not have been browning? must we not have been browning? must you not have been browning? must they not have been browning?