English verb conjugation
MUST EXCEL

Regular verb: excel - excelled - excelled

Affirmation

Simple form	V-ing form
I must excel you must excel he must excel we must excel you must excel they must excel	I must be excelling you must be excelling he must be excelling we must be excelling you must be excelling they must be excelling
Perfect	V-ing perfect
I must have excelled you must have excelled he must have excelled we must have excelled you must have excelled they must have excelled	I must have been excelling you must have been excelling he must have been excelling we must have been excelling you must have been excelling they must have been excelling

Negation

Simple form	V-ing form
I mustn't excel you mustn't excel he mustn't excel we mustn't excel you mustn't excel they mustn't excel	I mustn't be excelling you mustn't be excelling he mustn't be excelling we mustn't be excelling you mustn't be excelling they mustn't be excelling
Perfect	V-ing perfect
I mustn't have excelled you mustn't have excelled he mustn't have excelled we mustn't have excelled you mustn't have excelled they mustn't have excelled	I mustn't have been excelling you mustn't have been excelling he mustn't have been excelling we mustn't have been excelling you mustn't have been excelling they mustn't have been excelling

Interrogative form

Simple form	V-ing form
must I excel? must you excel? must he excel? must we excel? must you excel? must they excel?	must I be excelling? must you be excelling? must he be excelling? must we be excelling? must you be excelling? must they be excelling?
Perfect	V-ing perfect
must I have excelled? must you have excelled? must he have excelled? must we have excelled? must you have excelled? must they have excelled?	must I have been excelling? must you have been excelling? must he have been excelling? must we have been excelling? must you have been excelling? must they have been excelling?

Interro-negative form

Simple form	V-ing form
mustn't I excel? mustn't you excel? mustn't he excel? mustn't we excel? mustn't you excel? mustn't they excel?	mustn't I be excelling? mustn't you be excelling? mustn't he be excelling? mustn't we be excelling? mustn't you be excelling? mustn't they be excelling?
Perfect	V-ing perfect
mustn't I have excelled? mustn't you have excelled? mustn't he have excelled? mustn't we have excelled? mustn't you have excelled? mustn't they have excelled?	mustn't I have been excelling? mustn't you have been excelling? mustn't he have been excelling? mustn't we have been excelling? mustn't you have been excelling? mustn't they have been excelling?