I must countercharge you must countercharge he must countercharge we must countercharge you must countercharge they must countercharge
V-ing form
I must be countercharging you must be countercharging he must be countercharging we must be countercharging you must be countercharging they must be countercharging
Perfect
I must have countercharged you must have countercharged he must have countercharged we must have countercharged you must have countercharged they must have countercharged
V-ing perfect
I must have been countercharging you must have been countercharging he must have been countercharging we must have been countercharging you must have been countercharging they must have been countercharging
Negation
Simple form
I must not countercharge you must not countercharge he must not countercharge we must not countercharge you must not countercharge they must not countercharge
V-ing form
I must not be countercharging you must not be countercharging he must not be countercharging we must not be countercharging you must not be countercharging they must not be countercharging
Perfect
I must not have countercharged you must not have countercharged he must not have countercharged we must not have countercharged you must not have countercharged they must not have countercharged
V-ing perfect
I must not have been countercharging you must not have been countercharging he must not have been countercharging we must not have been countercharging you must not have been countercharging they must not have been countercharging
Interrogative form
Simple form
must I countercharge? must you countercharge? must he countercharge? must we countercharge? must you countercharge? must they countercharge?
V-ing form
must I be countercharging? must you be countercharging? must he be countercharging? must we be countercharging? must you be countercharging? must they be countercharging?
Perfect
must I have countercharged? must you have countercharged? must he have countercharged? must we have countercharged? must you have countercharged? must they have countercharged?
V-ing perfect
must I have been countercharging? must you have been countercharging? must he have been countercharging? must we have been countercharging? must you have been countercharging? must they have been countercharging?
Interro-negative form
Simple form
must I not countercharge? must you not countercharge? must he not countercharge? must we not countercharge? must you not countercharge? must they not countercharge?
V-ing form
must I not be countercharging? must you not be countercharging? must he not be countercharging? must we not be countercharging? must you not be countercharging? must they not be countercharging?
Perfect
must I not have countercharged? must you not have countercharged? must he not have countercharged? must we not have countercharged? must you not have countercharged? must they not have countercharged?
V-ing perfect
must I not have been countercharging? must you not have been countercharging? must he not have been countercharging? must we not have been countercharging? must you not have been countercharging? must they not have been countercharging?