English verb conjugation
MUST UNDERVALUE

Regular verb: undervalue - undervalued - undervalued

Affirmation

Simple form	V-ing form
I must undervalue you must undervalue she must undervalue we must undervalue you must undervalue they must undervalue	I must be undervaluing you must be undervaluing she must be undervaluing we must be undervaluing you must be undervaluing they must be undervaluing
Perfect	V-ing perfect
I must have undervalued you must have undervalued she must have undervalued we must have undervalued you must have undervalued they must have undervalued	I must have been undervaluing you must have been undervaluing she must have been undervaluing we must have been undervaluing you must have been undervaluing they must have been undervaluing

Negation

Simple form	V-ing form
I must not undervalue you must not undervalue she must not undervalue we must not undervalue you must not undervalue they must not undervalue	I must not be undervaluing you must not be undervaluing she must not be undervaluing we must not be undervaluing you must not be undervaluing they must not be undervaluing
Perfect	V-ing perfect
I must not have undervalued you must not have undervalued she must not have undervalued we must not have undervalued you must not have undervalued they must not have undervalued	I must not have been undervaluing you must not have been undervaluing she must not have been undervaluing we must not have been undervaluing you must not have been undervaluing they must not have been undervaluing

Interrogative form

Simple form	V-ing form
must I undervalue? must you undervalue? must she undervalue? must we undervalue? must you undervalue? must they undervalue?	must I be undervaluing? must you be undervaluing? must she be undervaluing? must we be undervaluing? must you be undervaluing? must they be undervaluing?
Perfect	V-ing perfect
must I have undervalued? must you have undervalued? must she have undervalued? must we have undervalued? must you have undervalued? must they have undervalued?	must I have been undervaluing? must you have been undervaluing? must she have been undervaluing? must we have been undervaluing? must you have been undervaluing? must they have been undervaluing?

Interro-negative form

Simple form	V-ing form
must I not undervalue? must you not undervalue? must she not undervalue? must we not undervalue? must you not undervalue? must they not undervalue?	must I not be undervaluing? must you not be undervaluing? must she not be undervaluing? must we not be undervaluing? must you not be undervaluing? must they not be undervaluing?
Perfect	V-ing perfect
must I not have undervalued? must you not have undervalued? must she not have undervalued? must we not have undervalued? must you not have undervalued? must they not have undervalued?	must I not have been undervaluing? must you not have been undervaluing? must she not have been undervaluing? must we not have been undervaluing? must you not have been undervaluing? must they not have been undervaluing?