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 mustn't underinsure you mustn't underinsure he mustn't underinsure we mustn't underinsure you mustn't underinsure they mustn't underinsure	I mustn't be underinsuring you mustn't be underinsuring he mustn't be underinsuring we mustn't be underinsuring you mustn't be underinsuring they mustn't be underinsuring
Perfect	V-ing perfect
I mustn't have underinsured you mustn't have underinsured he mustn't have underinsured we mustn't have underinsured you mustn't have underinsured they mustn't have underinsured	I mustn't have been underinsuring you mustn't have been underinsuring he mustn't have been underinsuring we mustn't have been underinsuring you mustn't have been underinsuring they mustn't 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
mustn't I underinsure? mustn't you underinsure? mustn't he underinsure? mustn't we underinsure? mustn't you underinsure? mustn't they underinsure?	mustn't I be underinsuring? mustn't you be underinsuring? mustn't he be underinsuring? mustn't we be underinsuring? mustn't you be underinsuring? mustn't they be underinsuring?
Perfect	V-ing perfect
mustn't I have underinsured? mustn't you have underinsured? mustn't he have underinsured? mustn't we have underinsured? mustn't you have underinsured? mustn't they have underinsured?	mustn't I have been underinsuring? mustn't you have been underinsuring? mustn't he have been underinsuring? mustn't we have been underinsuring? mustn't you have been underinsuring? mustn't they have been underinsuring?