I must excel you must excel she must excel we must excel you must excel they must excel
V-ing form
I must be excelling you must be excelling she must be excelling we must be excelling you must be excelling they must be excelling
Perfect
I must have excelled you must have excelled she must have excelled we must have excelled you must have excelled they must have excelled
V-ing perfect
I must have been excelling you must have been excelling she must have been excelling we must have been excelling you must have been excelling they must have been excelling
Negation
Simple form
I must not excel you must not excel she must not excel we must not excel you must not excel they must not excel
V-ing form
I must not be excelling you must not be excelling she must not be excelling we must not be excelling you must not be excelling they must not be excelling
Perfect
I must not have excelled you must not have excelled she must not have excelled we must not have excelled you must not have excelled they must not have excelled
V-ing perfect
I must not have been excelling you must not have been excelling she must not have been excelling we must not have been excelling you must not have been excelling they must not have been excelling
Interrogative form
Simple form
must I excel? must you excel? must she excel? must we excel? must you excel? must they excel?
V-ing form
must I be excelling? must you be excelling? must she be excelling? must we be excelling? must you be excelling? must they be excelling?
Perfect
must I have excelled? must you have excelled? must she have excelled? must we have excelled? must you have excelled? must they have excelled?
V-ing perfect
must I have been excelling? must you have been excelling? must she have been excelling? must we have been excelling? must you have been excelling? must they have been excelling?
Interro-negative form
Simple form
must I not excel? must you not excel? must she not excel? must we not excel? must you not excel? must they not excel?
V-ing form
must I not be excelling? must you not be excelling? must she not be excelling? must we not be excelling? must you not be excelling? must they not be excelling?
Perfect
must I not have excelled? must you not have excelled? must she not have excelled? must we not have excelled? must you not have excelled? must they not have excelled?
V-ing perfect
must I not have been excelling? must you not have been excelling? must she not have been excelling? must we not have been excelling? must you not have been excelling? must they not have been excelling?