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