English verb conjugation
MUST UNDERINSURE

Regular verb: underinsure - underinsured - underinsured

Affirmation

Simple form	V-ing form
I must underinsure you must underinsure he must underinsure we must underinsure you must underinsure they must underinsure	I must be underinsuring you must be underinsuring he must be underinsuring we must be underinsuring you must be underinsuring they must be underinsuring
Perfect	V-ing perfect
I must have underinsured you must have underinsured he must have underinsured we must have underinsured you must have underinsured they must have underinsured	I must have been underinsuring you must have been underinsuring he must have been underinsuring we must have been underinsuring you must have been underinsuring they must have been underinsuring

Negation

Simple form	V-ing form
I must not underinsure you must not underinsure he must not underinsure we must not underinsure you must not underinsure they must not underinsure	I must not be underinsuring you must not be underinsuring he must not be underinsuring we must not be underinsuring you must not be underinsuring they must not be underinsuring
Perfect	V-ing perfect
I must not have underinsured you must not have underinsured he must not have underinsured we must not have underinsured you must not have underinsured they must not have underinsured	I must not have been underinsuring you must not have been underinsuring he must not have been underinsuring we must not have been underinsuring you must not have been underinsuring they must not have been underinsuring

Interrogative form

Simple form	V-ing form
must I underinsure? must you underinsure? must he underinsure? must we underinsure? must you underinsure? must they underinsure?	must I be underinsuring? must you be underinsuring? must he be underinsuring? must we be underinsuring? must you be underinsuring? must they be underinsuring?
Perfect	V-ing perfect
must I have underinsured? must you have underinsured? must he have underinsured? must we have underinsured? must you have underinsured? must they have underinsured?	must I have been underinsuring? must you have been underinsuring? must he have been underinsuring? must we have been underinsuring? must you have been underinsuring? must they have been underinsuring?

Interro-negative form

Simple form	V-ing form
must I not underinsure? must you not underinsure? must he not underinsure? must we not underinsure? must you not underinsure? must they not underinsure?	must I not be underinsuring? must you not be underinsuring? must he not be underinsuring? must we not be underinsuring? must you not be underinsuring? must they not be underinsuring?
Perfect	V-ing perfect
must I not have underinsured? must you not have underinsured? must he not have underinsured? must we not have underinsured? must you not have underinsured? must they not have underinsured?	must I not have been underinsuring? must you not have been underinsuring? must he not have been underinsuring? must we not have been underinsuring? must you not have been underinsuring? must they not have been underinsuring?