must counterassault
Regular verb: counterassault - counterassaulted- counterassaulted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must counterassault
you must counterassault
he must counterassault
we must counterassault
you must counterassault
they must counterassault 	I must be counterassaulting
you must be counterassaulting
he must be counterassaulting
we must be counterassaulting
you must be counterassaulting
they must be counterassaulting	I must have counterassaulted
you must have counterassaulted
he must have counterassaulted
we must have counterassaulted
you must have counterassaulted
they must have counterassaulted	I must have been counterassaulting
you must have been counterassaulting
he must have been counterassaulting
we must have been counterassaulting
you must have been counterassaulting
they must have been counterassaulting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't counterassault
you mustn't counterassault
he mustn't counterassault
we mustn't counterassault
you mustn't counterassault
they mustn't counterassault 	I mustn't be counterassaulting
you mustn't be counterassaulting
he mustn't be counterassaulting
we mustn't be counterassaulting
you mustn't be counterassaulting
they mustn't be counterassaulting	I mustn't have counterassaulted
you mustn't have counterassaulted
he mustn't have counterassaulted
we mustn't have counterassaulted
you mustn't have counterassaulted
they mustn't have counterassaulted	I mustn't have been counterassaulting
you mustn't have been counterassaulting
he mustn't have been counterassaulting
we mustn't have been counterassaulting
you mustn't have been counterassaulting
they mustn't have been counterassaulting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I counterassault?
must you counterassault?
must he counterassault?
must we counterassault?
must you counterassault?
must they counterassault? 	must I be counterassaulting?
must you be counterassaulting?
must he be counterassaulting?
must we be counterassaulting?
must you be counterassaulting?
must they be counterassaulting? 	must I have counterassaulted?
must you have counterassaulted?
must he have counterassaulted?
must we have counterassaulted?
must you have counterassaulted?
must they have counterassaulted? 	must I have been counterassaulting?
must you have been counterassaulting?
must he have been counterassaulting?
must we have been counterassaulting?
must you have been counterassaulting?
must they have been counterassaulting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I counterassault?
mustn't you counterassault?
mustn't he counterassault?
mustn't we counterassault?
mustn't you counterassault?
mustn't they counterassault? 	mustn't I be counterassaulting?
mustn't you be counterassaulting?
mustn't he be counterassaulting?
mustn't we be counterassaulting?
mustn't you be counterassaulting?
mustn't they be counterassaulting? 	mustn't I have counterassaulted?
mustn't you have counterassaulted?
mustn't he have counterassaulted?
mustn't we have counterassaulted?
mustn't you have counterassaulted?
mustn't they have counterassaulted? 	mustn't I have been counterassaulting?
mustn't you have been counterassaulting?
mustn't he have been counterassaulting?
mustn't we have been counterassaulting?
mustn't you have been counterassaulting?
mustn't they have been counterassaulting?