English verb conjugation
MUST UNDERSTATE

Regular verb: understate - understated - understated

Affirmation

Simple form	V-ing form
I must understate you must understate he must understate we must understate you must understate they must understate	I must be understating you must be understating he must be understating we must be understating you must be understating they must be understating
Perfect	V-ing perfect
I must have understated you must have understated he must have understated we must have understated you must have understated they must have understated	I must have been understating you must have been understating he must have been understating we must have been understating you must have been understating they must have been understating

Negation

Simple form	V-ing form
I mustn't understate you mustn't understate he mustn't understate we mustn't understate you mustn't understate they mustn't understate	I mustn't be understating you mustn't be understating he mustn't be understating we mustn't be understating you mustn't be understating they mustn't be understating
Perfect	V-ing perfect
I mustn't have understated you mustn't have understated he mustn't have understated we mustn't have understated you mustn't have understated they mustn't have understated	I mustn't have been understating you mustn't have been understating he mustn't have been understating we mustn't have been understating you mustn't have been understating they mustn't have been understating

Interrogative form

Simple form	V-ing form
must I understate? must you understate? must he understate? must we understate? must you understate? must they understate?	must I be understating? must you be understating? must he be understating? must we be understating? must you be understating? must they be understating?
Perfect	V-ing perfect
must I have understated? must you have understated? must he have understated? must we have understated? must you have understated? must they have understated?	must I have been understating? must you have been understating? must he have been understating? must we have been understating? must you have been understating? must they have been understating?

Interro-negative form

Simple form	V-ing form
mustn't I understate? mustn't you understate? mustn't he understate? mustn't we understate? mustn't you understate? mustn't they understate?	mustn't I be understating? mustn't you be understating? mustn't he be understating? mustn't we be understating? mustn't you be understating? mustn't they be understating?
Perfect	V-ing perfect
mustn't I have understated? mustn't you have understated? mustn't he have understated? mustn't we have understated? mustn't you have understated? mustn't they have understated?	mustn't I have been understating? mustn't you have been understating? mustn't he have been understating? mustn't we have been understating? mustn't you have been understating? mustn't they have been understating?