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 mustn't brown you mustn't brown she mustn't brown we mustn't brown you mustn't brown they mustn't brown	I mustn't be browning you mustn't be browning she mustn't be browning we mustn't be browning you mustn't be browning they mustn't be browning
Perfect	V-ing perfect
I mustn't have browned you mustn't have browned she mustn't have browned we mustn't have browned you mustn't have browned they mustn't have browned	I mustn't have been browning you mustn't have been browning she mustn't have been browning we mustn't have been browning you mustn't have been browning they mustn't 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
mustn't I brown? mustn't you brown? mustn't she brown? mustn't we brown? mustn't you brown? mustn't they brown?	mustn't I be browning? mustn't you be browning? mustn't she be browning? mustn't we be browning? mustn't you be browning? mustn't they be browning?
Perfect	V-ing perfect
mustn't I have browned? mustn't you have browned? mustn't she have browned? mustn't we have browned? mustn't you have browned? mustn't they have browned?	mustn't I have been browning? mustn't you have been browning? mustn't she have been browning? mustn't we have been browning? mustn't you have been browning? mustn't they have been browning?