English verb conjugation
MUST LABOR

Regular verb: labor - labored - labored

Affirmation

Simple form	V-ing form
I must labor you must labor he must labor we must labor you must labor they must labor	I must be laboring you must be laboring he must be laboring we must be laboring you must be laboring they must be laboring
Perfect	V-ing perfect
I must have labored you must have labored he must have labored we must have labored you must have labored they must have labored	I must have been laboring you must have been laboring he must have been laboring we must have been laboring you must have been laboring they must have been laboring

Negation

Simple form	V-ing form
I must not labor you must not labor he must not labor we must not labor you must not labor they must not labor	I must not be laboring you must not be laboring he must not be laboring we must not be laboring you must not be laboring they must not be laboring
Perfect	V-ing perfect
I must not have labored you must not have labored he must not have labored we must not have labored you must not have labored they must not have labored	I must not have been laboring you must not have been laboring he must not have been laboring we must not have been laboring you must not have been laboring they must not have been laboring

Interrogative form

Simple form	V-ing form
must I labor? must you labor? must he labor? must we labor? must you labor? must they labor?	must I be laboring? must you be laboring? must he be laboring? must we be laboring? must you be laboring? must they be laboring?
Perfect	V-ing perfect
must I have labored? must you have labored? must he have labored? must we have labored? must you have labored? must they have labored?	must I have been laboring? must you have been laboring? must he have been laboring? must we have been laboring? must you have been laboring? must they have been laboring?

Interro-negative form

Simple form	V-ing form
must I not labor? must you not labor? must he not labor? must we not labor? must you not labor? must they not labor?	must I not be laboring? must you not be laboring? must he not be laboring? must we not be laboring? must you not be laboring? must they not be laboring?
Perfect	V-ing perfect
must I not have labored? must you not have labored? must he not have labored? must we not have labored? must you not have labored? must they not have labored?	must I not have been laboring? must you not have been laboring? must he not have been laboring? must we not have been laboring? must you not have been laboring? must they not have been laboring?