English verb conjugation
MUST COUNTERACT

Regular verb: counteract - counteracted - counteracted

Affirmation

Simple form	V-ing form
I must counteract you must counteract she must counteract we must counteract you must counteract they must counteract	I must be counteracting you must be counteracting she 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 she 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 she 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 must not counteract you must not counteract she must not counteract we must not counteract you must not counteract they must not counteract	I must not be counteracting you must not be counteracting she must not be counteracting we must not be counteracting you must not be counteracting they must not be counteracting
Perfect	V-ing perfect
I must not have counteracted you must not have counteracted she must not have counteracted we must not have counteracted you must not have counteracted they must not have counteracted	I must not have been counteracting you must not have been counteracting she must not have been counteracting we must not have been counteracting you must not have been counteracting they must not have been counteracting

Interrogative form

Simple form	V-ing form
must I counteract? must you counteract? must she counteract? must we counteract? must you counteract? must they counteract?	must I be counteracting? must you be counteracting? must she 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 she 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 she 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
must I not counteract? must you not counteract? must she not counteract? must we not counteract? must you not counteract? must they not counteract?	must I not be counteracting? must you not be counteracting? must she not be counteracting? must we not be counteracting? must you not be counteracting? must they not be counteracting?
Perfect	V-ing perfect
must I not have counteracted? must you not have counteracted? must she not have counteracted? must we not have counteracted? must you not have counteracted? must they not have counteracted?	must I not have been counteracting? must you not have been counteracting? must she not have been counteracting? must we not have been counteracting? must you not have been counteracting? must they not have been counteracting?