English verb conjugation
MUST FACTOR

Regular verb: factor - factored - factored

Affirmation

Simple form	V-ing form
I must factor you must factor he must factor we must factor you must factor they must factor	I must be factoring you must be factoring he must be factoring we must be factoring you must be factoring they must be factoring
Perfect	V-ing perfect
I must have factored you must have factored he must have factored we must have factored you must have factored they must have factored	I must have been factoring you must have been factoring he must have been factoring we must have been factoring you must have been factoring they must have been factoring

Negation

Simple form	V-ing form
I must not factor you must not factor he must not factor we must not factor you must not factor they must not factor	I must not be factoring you must not be factoring he must not be factoring we must not be factoring you must not be factoring they must not be factoring
Perfect	V-ing perfect
I must not have factored you must not have factored he must not have factored we must not have factored you must not have factored they must not have factored	I must not have been factoring you must not have been factoring he must not have been factoring we must not have been factoring you must not have been factoring they must not have been factoring

Interrogative form

Simple form	V-ing form
must I factor? must you factor? must he factor? must we factor? must you factor? must they factor?	must I be factoring? must you be factoring? must he be factoring? must we be factoring? must you be factoring? must they be factoring?
Perfect	V-ing perfect
must I have factored? must you have factored? must he have factored? must we have factored? must you have factored? must they have factored?	must I have been factoring? must you have been factoring? must he have been factoring? must we have been factoring? must you have been factoring? must they have been factoring?

Interro-negative form

Simple form	V-ing form
must I not factor? must you not factor? must he not factor? must we not factor? must you not factor? must they not factor?	must I not be factoring? must you not be factoring? must he not be factoring? must we not be factoring? must you not be factoring? must they not be factoring?
Perfect	V-ing perfect
must I not have factored? must you not have factored? must he not have factored? must we not have factored? must you not have factored? must they not have factored?	must I not have been factoring? must you not have been factoring? must he not have been factoring? must we not have been factoring? must you not have been factoring? must they not have been factoring?