must countercharge
Regular verb: countercharge - countercharged- countercharged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must countercharge
you must countercharge
she must countercharge
we must countercharge
you must countercharge
they must countercharge 	I must be countercharging
you must be countercharging
she must be countercharging
we must be countercharging
you must be countercharging
they must be countercharging	I must have countercharged
you must have countercharged
she must have countercharged
we must have countercharged
you must have countercharged
they must have countercharged	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 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't countercharge
you mustn't countercharge
she mustn't countercharge
we mustn't countercharge
you mustn't countercharge
they mustn't countercharge 	I mustn't be countercharging
you mustn't be countercharging
she mustn't be countercharging
we mustn't be countercharging
you mustn't be countercharging
they mustn't be countercharging	I mustn't have countercharged
you mustn't have countercharged
she mustn't have countercharged
we mustn't have countercharged
you mustn't have countercharged
they mustn't have countercharged	I mustn't have been countercharging
you mustn't have been countercharging
she mustn't have been countercharging
we mustn't have been countercharging
you mustn't have been countercharging
they mustn't have been countercharging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I countercharge?
must you countercharge?
must she countercharge?
must we countercharge?
must you countercharge?
must they countercharge? 	must I be countercharging?
must you be countercharging?
must she be countercharging?
must we be countercharging?
must you be countercharging?
must they be countercharging? 	must I have countercharged?
must you have countercharged?
must she have countercharged?
must we have countercharged?
must you have countercharged?
must they have countercharged? 	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 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I countercharge?
mustn't you countercharge?
mustn't she countercharge?
mustn't we countercharge?
mustn't you countercharge?
mustn't they countercharge? 	mustn't I be countercharging?
mustn't you be countercharging?
mustn't she be countercharging?
mustn't we be countercharging?
mustn't you be countercharging?
mustn't they be countercharging? 	mustn't I have countercharged?
mustn't you have countercharged?
mustn't she have countercharged?
mustn't we have countercharged?
mustn't you have countercharged?
mustn't they have countercharged? 	mustn't I have been countercharging?
mustn't you have been countercharging?
mustn't she have been countercharging?
mustn't we have been countercharging?
mustn't you have been countercharging?
mustn't they have been countercharging?