English verb conjugation
MUST COUNTERACT

Regular verb: counteract - counteracted - counteracted

Affirmation

Simple form	V-ing form
I must counteract you must counteract he must counteract we must counteract you must counteract they must counteract	I must be counteracting you must be counteracting he must be counteracting we must be counteracting you must be counteracting they must be counteracting
Perfect	V-ing perfect
I must have counteracted you must have counteracted he must have counteracted we must have counteracted you must have counteracted they must have counteracted	I must have been counteracting you must have been counteracting he must have been counteracting we must have been counteracting you must have been counteracting they must have been counteracting

Negation

Simple form	V-ing form
I mustn't counteract you mustn't counteract he mustn't counteract we mustn't counteract you mustn't counteract they mustn't counteract	I mustn't be counteracting you mustn't be counteracting he mustn't be counteracting we mustn't be counteracting you mustn't be counteracting they mustn't be counteracting
Perfect	V-ing perfect
I mustn't have counteracted you mustn't have counteracted he mustn't have counteracted we mustn't have counteracted you mustn't have counteracted they mustn't have counteracted	I mustn't have been counteracting you mustn't have been counteracting he mustn't have been counteracting we mustn't have been counteracting you mustn't have been counteracting they mustn't have been counteracting

Interrogative form

Simple form	V-ing form
must I counteract? must you counteract? must he counteract? must we counteract? must you counteract? must they counteract?	must I be counteracting? must you be counteracting? must he be counteracting? must we be counteracting? must you be counteracting? must they be counteracting?
Perfect	V-ing perfect
must I have counteracted? must you have counteracted? must he have counteracted? must we have counteracted? must you have counteracted? must they have counteracted?	must I have been counteracting? must you have been counteracting? must he have been counteracting? must we have been counteracting? must you have been counteracting? must they have been counteracting?

Interro-negative form

Simple form	V-ing form
mustn't I counteract? mustn't you counteract? mustn't he counteract? mustn't we counteract? mustn't you counteract? mustn't they counteract?	mustn't I be counteracting? mustn't you be counteracting? mustn't he be counteracting? mustn't we be counteracting? mustn't you be counteracting? mustn't they be counteracting?
Perfect	V-ing perfect
mustn't I have counteracted? mustn't you have counteracted? mustn't he have counteracted? mustn't we have counteracted? mustn't you have counteracted? mustn't they have counteracted?	mustn't I have been counteracting? mustn't you have been counteracting? mustn't he have been counteracting? mustn't we have been counteracting? mustn't you have been counteracting? mustn't they have been counteracting?