English verb conjugation
MUST UNDERREACT

Regular verb: underreact - underreacted - underreacted

Affirmation

Simple form	V-ing form
I must underreact you must underreact he must underreact we must underreact you must underreact they must underreact	I must be underreacting you must be underreacting he must be underreacting we must be underreacting you must be underreacting they must be underreacting
Perfect	V-ing perfect
I must have underreacted you must have underreacted he must have underreacted we must have underreacted you must have underreacted they must have underreacted	I must have been underreacting you must have been underreacting he must have been underreacting we must have been underreacting you must have been underreacting they must have been underreacting

Negation

Simple form	V-ing form
I mustn't underreact you mustn't underreact he mustn't underreact we mustn't underreact you mustn't underreact they mustn't underreact	I mustn't be underreacting you mustn't be underreacting he mustn't be underreacting we mustn't be underreacting you mustn't be underreacting they mustn't be underreacting
Perfect	V-ing perfect
I mustn't have underreacted you mustn't have underreacted he mustn't have underreacted we mustn't have underreacted you mustn't have underreacted they mustn't have underreacted	I mustn't have been underreacting you mustn't have been underreacting he mustn't have been underreacting we mustn't have been underreacting you mustn't have been underreacting they mustn't have been underreacting

Interrogative form

Simple form	V-ing form
must I underreact? must you underreact? must he underreact? must we underreact? must you underreact? must they underreact?	must I be underreacting? must you be underreacting? must he be underreacting? must we be underreacting? must you be underreacting? must they be underreacting?
Perfect	V-ing perfect
must I have underreacted? must you have underreacted? must he have underreacted? must we have underreacted? must you have underreacted? must they have underreacted?	must I have been underreacting? must you have been underreacting? must he have been underreacting? must we have been underreacting? must you have been underreacting? must they have been underreacting?

Interro-negative form

Simple form	V-ing form
mustn't I underreact? mustn't you underreact? mustn't he underreact? mustn't we underreact? mustn't you underreact? mustn't they underreact?	mustn't I be underreacting? mustn't you be underreacting? mustn't he be underreacting? mustn't we be underreacting? mustn't you be underreacting? mustn't they be underreacting?
Perfect	V-ing perfect
mustn't I have underreacted? mustn't you have underreacted? mustn't he have underreacted? mustn't we have underreacted? mustn't you have underreacted? mustn't they have underreacted?	mustn't I have been underreacting? mustn't you have been underreacting? mustn't he have been underreacting? mustn't we have been underreacting? mustn't you have been underreacting? mustn't they have been underreacting?