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 must not ball you must not ball he must not ball we must not ball you must not ball they must not ball	I must not be balling you must not be balling he must not be balling we must not be balling you must not be balling they must not be balling
Perfect	V-ing perfect
I must not have balled you must not have balled he must not have balled we must not have balled you must not have balled they must not have balled	I must not have been balling you must not have been balling he must not have been balling we must not have been balling you must not have been balling they must not 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
must I not ball? must you not ball? must he not ball? must we not ball? must you not ball? must they not ball?	must I not be balling? must you not be balling? must he not be balling? must we not be balling? must you not be balling? must they not be balling?
Perfect	V-ing perfect
must I not have balled? must you not have balled? must he not have balled? must we not have balled? must you not have balled? must they not have balled?	must I not have been balling? must you not have been balling? must he not have been balling? must we not have been balling? must you not have been balling? must they not have been balling?