English verb conjugation
MUST ENDEAVOR

Regular verb: endeavor - endeavored - endeavored

Affirmation

Simple form	V-ing form
I must endeavor you must endeavor he must endeavor we must endeavor you must endeavor they must endeavor	I must be endeavoring you must be endeavoring he must be endeavoring we must be endeavoring you must be endeavoring they must be endeavoring
Perfect	V-ing perfect
I must have endeavored you must have endeavored he must have endeavored we must have endeavored you must have endeavored they must have endeavored	I must have been endeavoring you must have been endeavoring he must have been endeavoring we must have been endeavoring you must have been endeavoring they must have been endeavoring

Negation

Simple form	V-ing form
I must not endeavor you must not endeavor he must not endeavor we must not endeavor you must not endeavor they must not endeavor	I must not be endeavoring you must not be endeavoring he must not be endeavoring we must not be endeavoring you must not be endeavoring they must not be endeavoring
Perfect	V-ing perfect
I must not have endeavored you must not have endeavored he must not have endeavored we must not have endeavored you must not have endeavored they must not have endeavored	I must not have been endeavoring you must not have been endeavoring he must not have been endeavoring we must not have been endeavoring you must not have been endeavoring they must not have been endeavoring

Interrogative form

Simple form	V-ing form
must I endeavor? must you endeavor? must he endeavor? must we endeavor? must you endeavor? must they endeavor?	must I be endeavoring? must you be endeavoring? must he be endeavoring? must we be endeavoring? must you be endeavoring? must they be endeavoring?
Perfect	V-ing perfect
must I have endeavored? must you have endeavored? must he have endeavored? must we have endeavored? must you have endeavored? must they have endeavored?	must I have been endeavoring? must you have been endeavoring? must he have been endeavoring? must we have been endeavoring? must you have been endeavoring? must they have been endeavoring?

Interro-negative form

Simple form	V-ing form
must I not endeavor? must you not endeavor? must he not endeavor? must we not endeavor? must you not endeavor? must they not endeavor?	must I not be endeavoring? must you not be endeavoring? must he not be endeavoring? must we not be endeavoring? must you not be endeavoring? must they not be endeavoring?
Perfect	V-ing perfect
must I not have endeavored? must you not have endeavored? must he not have endeavored? must we not have endeavored? must you not have endeavored? must they not have endeavored?	must I not have been endeavoring? must you not have been endeavoring? must he not have been endeavoring? must we not have been endeavoring? must you not have been endeavoring? must they not have been endeavoring?