English verb conjugation
MUST BRAIN

Regular verb: brain - brained - brained

Affirmation

Simple form	V-ing form
I must brain you must brain she must brain we must brain you must brain they must brain	I must be braining you must be braining she must be braining we must be braining you must be braining they must be braining
Perfect	V-ing perfect
I must have brained you must have brained she must have brained we must have brained you must have brained they must have brained	I must have been braining you must have been braining she must have been braining we must have been braining you must have been braining they must have been braining

Negation

Simple form	V-ing form
I mustn't brain you mustn't brain she mustn't brain we mustn't brain you mustn't brain they mustn't brain	I mustn't be braining you mustn't be braining she mustn't be braining we mustn't be braining you mustn't be braining they mustn't be braining
Perfect	V-ing perfect
I mustn't have brained you mustn't have brained she mustn't have brained we mustn't have brained you mustn't have brained they mustn't have brained	I mustn't have been braining you mustn't have been braining she mustn't have been braining we mustn't have been braining you mustn't have been braining they mustn't have been braining

Interrogative form

Simple form	V-ing form
must I brain? must you brain? must she brain? must we brain? must you brain? must they brain?	must I be braining? must you be braining? must she be braining? must we be braining? must you be braining? must they be braining?
Perfect	V-ing perfect
must I have brained? must you have brained? must she have brained? must we have brained? must you have brained? must they have brained?	must I have been braining? must you have been braining? must she have been braining? must we have been braining? must you have been braining? must they have been braining?

Interro-negative form

Simple form	V-ing form
mustn't I brain? mustn't you brain? mustn't she brain? mustn't we brain? mustn't you brain? mustn't they brain?	mustn't I be braining? mustn't you be braining? mustn't she be braining? mustn't we be braining? mustn't you be braining? mustn't they be braining?
Perfect	V-ing perfect
mustn't I have brained? mustn't you have brained? mustn't she have brained? mustn't we have brained? mustn't you have brained? mustn't they have brained?	mustn't I have been braining? mustn't you have been braining? mustn't she have been braining? mustn't we have been braining? mustn't you have been braining? mustn't they have been braining?