I must countercharge you must countercharge she must countercharge we must countercharge you must countercharge they must countercharge
V-ing form
I must be countercharging you must be countercharging she must be countercharging we must be countercharging you must be countercharging they must be countercharging
Perfect
I must have countercharged you must have countercharged she 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 she 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 she 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 she 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 she 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 she 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 she countercharge? must we countercharge? must you countercharge? must they countercharge?
V-ing form
must I be countercharging? must you be countercharging? must she be countercharging? must we be countercharging? must you be countercharging? must they be countercharging?
Perfect
must I have countercharged? must you have countercharged? must she 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 she 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 she 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 she 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 she 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 she not have been countercharging? must we not have been countercharging? must you not have been countercharging? must they not have been countercharging?