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 must not underreact you must not underreact he must not underreact we must not underreact you must not underreact they must not underreact	I must not be underreacting you must not be underreacting he must not be underreacting we must not be underreacting you must not be underreacting they must not be underreacting
Perfect	V-ing perfect
I must not have underreacted you must not have underreacted he must not have underreacted we must not have underreacted you must not have underreacted they must not have underreacted	I must not have been underreacting you must not have been underreacting he must not have been underreacting we must not have been underreacting you must not have been underreacting they must not 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
must I not underreact? must you not underreact? must he not underreact? must we not underreact? must you not underreact? must they not underreact?	must I not be underreacting? must you not be underreacting? must he not be underreacting? must we not be underreacting? must you not be underreacting? must they not be underreacting?
Perfect	V-ing perfect
must I not have underreacted? must you not have underreacted? must he not have underreacted? must we not have underreacted? must you not have underreacted? must they not have underreacted?	must I not have been underreacting? must you not have been underreacting? must he not have been underreacting? must we not have been underreacting? must you not have been underreacting? must they not have been underreacting?