English verb conjugation
MUST BALL

Regular verb: ball - balled - balled

Affirmation

Simple form	V-ing form
I must ball you must ball he must ball we must ball you must ball they must ball	I must be balling you must be balling he must be balling we must be balling you must be balling they must be balling
Perfect	V-ing perfect
I must have balled you must have balled he must have balled we must have balled you must have balled they must have balled	I must have been balling you must have been balling he must have been balling we must have been balling you must have been balling they must have been balling

Negation

Simple form	V-ing form
I mustn't ball you mustn't ball he mustn't ball we mustn't ball you mustn't ball they mustn't ball	I mustn't be balling you mustn't be balling he mustn't be balling we mustn't be balling you mustn't be balling they mustn't be balling
Perfect	V-ing perfect
I mustn't have balled you mustn't have balled he mustn't have balled we mustn't have balled you mustn't have balled they mustn't have balled	I mustn't have been balling you mustn't have been balling he mustn't have been balling we mustn't have been balling you mustn't have been balling they mustn't have been balling

Interrogative form

Simple form	V-ing form
must I ball? must you ball? must he ball? must we ball? must you ball? must they ball?	must I be balling? must you be balling? must he be balling? must we be balling? must you be balling? must they be balling?
Perfect	V-ing perfect
must I have balled? must you have balled? must he have balled? must we have balled? must you have balled? must they have balled?	must I have been balling? must you have been balling? must he have been balling? must we have been balling? must you have been balling? must they have been balling?

Interro-negative form

Simple form	V-ing form
mustn't I ball? mustn't you ball? mustn't he ball? mustn't we ball? mustn't you ball? mustn't they ball?	mustn't I be balling? mustn't you be balling? mustn't he be balling? mustn't we be balling? mustn't you be balling? mustn't they be balling?
Perfect	V-ing perfect
mustn't I have balled? mustn't you have balled? mustn't he have balled? mustn't we have balled? mustn't you have balled? mustn't they have balled?	mustn't I have been balling? mustn't you have been balling? mustn't he have been balling? mustn't we have been balling? mustn't you have been balling? mustn't they have been balling?