English verb conjugation
MUST UNDERRATE

Regular verb: underrate - underrated - underrated

Affirmation

Simple form	V-ing form
I must underrate you must underrate he must underrate we must underrate you must underrate they must underrate	I must be underrating you must be underrating he must be underrating we must be underrating you must be underrating they must be underrating
Perfect	V-ing perfect
I must have underrated you must have underrated he must have underrated we must have underrated you must have underrated they must have underrated	I must have been underrating you must have been underrating he must have been underrating we must have been underrating you must have been underrating they must have been underrating

Negation

Simple form	V-ing form
I mustn't underrate you mustn't underrate he mustn't underrate we mustn't underrate you mustn't underrate they mustn't underrate	I mustn't be underrating you mustn't be underrating he mustn't be underrating we mustn't be underrating you mustn't be underrating they mustn't be underrating
Perfect	V-ing perfect
I mustn't have underrated you mustn't have underrated he mustn't have underrated we mustn't have underrated you mustn't have underrated they mustn't have underrated	I mustn't have been underrating you mustn't have been underrating he mustn't have been underrating we mustn't have been underrating you mustn't have been underrating they mustn't have been underrating

Interrogative form

Simple form	V-ing form
must I underrate? must you underrate? must he underrate? must we underrate? must you underrate? must they underrate?	must I be underrating? must you be underrating? must he be underrating? must we be underrating? must you be underrating? must they be underrating?
Perfect	V-ing perfect
must I have underrated? must you have underrated? must he have underrated? must we have underrated? must you have underrated? must they have underrated?	must I have been underrating? must you have been underrating? must he have been underrating? must we have been underrating? must you have been underrating? must they have been underrating?

Interro-negative form

Simple form	V-ing form
mustn't I underrate? mustn't you underrate? mustn't he underrate? mustn't we underrate? mustn't you underrate? mustn't they underrate?	mustn't I be underrating? mustn't you be underrating? mustn't he be underrating? mustn't we be underrating? mustn't you be underrating? mustn't they be underrating?
Perfect	V-ing perfect
mustn't I have underrated? mustn't you have underrated? mustn't he have underrated? mustn't we have underrated? mustn't you have underrated? mustn't they have underrated?	mustn't I have been underrating? mustn't you have been underrating? mustn't he have been underrating? mustn't we have been underrating? mustn't you have been underrating? mustn't they have been underrating?