English verb conjugation
MUST ENROLL

Regular verb: enroll - enrolled - enrolled

Affirmation

Simple form	V-ing form
I must enroll you must enroll he must enroll we must enroll you must enroll they must enroll	I must be enrolling you must be enrolling he must be enrolling we must be enrolling you must be enrolling they must be enrolling
Perfect	V-ing perfect
I must have enrolled you must have enrolled he must have enrolled we must have enrolled you must have enrolled they must have enrolled	I must have been enrolling you must have been enrolling he must have been enrolling we must have been enrolling you must have been enrolling they must have been enrolling

Negation

Simple form	V-ing form
I must not enroll you must not enroll he must not enroll we must not enroll you must not enroll they must not enroll	I must not be enrolling you must not be enrolling he must not be enrolling we must not be enrolling you must not be enrolling they must not be enrolling
Perfect	V-ing perfect
I must not have enrolled you must not have enrolled he must not have enrolled we must not have enrolled you must not have enrolled they must not have enrolled	I must not have been enrolling you must not have been enrolling he must not have been enrolling we must not have been enrolling you must not have been enrolling they must not have been enrolling

Interrogative form

Simple form	V-ing form
must I enroll? must you enroll? must he enroll? must we enroll? must you enroll? must they enroll?	must I be enrolling? must you be enrolling? must he be enrolling? must we be enrolling? must you be enrolling? must they be enrolling?
Perfect	V-ing perfect
must I have enrolled? must you have enrolled? must he have enrolled? must we have enrolled? must you have enrolled? must they have enrolled?	must I have been enrolling? must you have been enrolling? must he have been enrolling? must we have been enrolling? must you have been enrolling? must they have been enrolling?

Interro-negative form

Simple form	V-ing form
must I not enroll? must you not enroll? must he not enroll? must we not enroll? must you not enroll? must they not enroll?	must I not be enrolling? must you not be enrolling? must he not be enrolling? must we not be enrolling? must you not be enrolling? must they not be enrolling?
Perfect	V-ing perfect
must I not have enrolled? must you not have enrolled? must he not have enrolled? must we not have enrolled? must you not have enrolled? must they not have enrolled?	must I not have been enrolling? must you not have been enrolling? must he not have been enrolling? must we not have been enrolling? must you not have been enrolling? must they not have been enrolling?