must unlimber
Regular verb: unlimber - unlimbered- unlimbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unlimber
you must unlimber
he must unlimber
we must unlimber
you must unlimber
they must unlimber 	I must be unlimbering
you must be unlimbering
he must be unlimbering
we must be unlimbering
you must be unlimbering
they must be unlimbering	I must have unlimbered
you must have unlimbered
he must have unlimbered
we must have unlimbered
you must have unlimbered
they must have unlimbered	I must have been unlimbering
you must have been unlimbering
he must have been unlimbering
we must have been unlimbering
you must have been unlimbering
they must have been unlimbering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unlimber
you mustn't unlimber
he mustn't unlimber
we mustn't unlimber
you mustn't unlimber
they mustn't unlimber 	I mustn't be unlimbering
you mustn't be unlimbering
he mustn't be unlimbering
we mustn't be unlimbering
you mustn't be unlimbering
they mustn't be unlimbering	I mustn't have unlimbered
you mustn't have unlimbered
he mustn't have unlimbered
we mustn't have unlimbered
you mustn't have unlimbered
they mustn't have unlimbered	I mustn't have been unlimbering
you mustn't have been unlimbering
he mustn't have been unlimbering
we mustn't have been unlimbering
you mustn't have been unlimbering
they mustn't have been unlimbering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unlimber?
must you unlimber?
must he unlimber?
must we unlimber?
must you unlimber?
must they unlimber? 	must I be unlimbering?
must you be unlimbering?
must he be unlimbering?
must we be unlimbering?
must you be unlimbering?
must they be unlimbering? 	must I have unlimbered?
must you have unlimbered?
must he have unlimbered?
must we have unlimbered?
must you have unlimbered?
must they have unlimbered? 	must I have been unlimbering?
must you have been unlimbering?
must he have been unlimbering?
must we have been unlimbering?
must you have been unlimbering?
must they have been unlimbering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unlimber?
mustn't you unlimber?
mustn't he unlimber?
mustn't we unlimber?
mustn't you unlimber?
mustn't they unlimber? 	mustn't I be unlimbering?
mustn't you be unlimbering?
mustn't he be unlimbering?
mustn't we be unlimbering?
mustn't you be unlimbering?
mustn't they be unlimbering? 	mustn't I have unlimbered?
mustn't you have unlimbered?
mustn't he have unlimbered?
mustn't we have unlimbered?
mustn't you have unlimbered?
mustn't they have unlimbered? 	mustn't I have been unlimbering?
mustn't you have been unlimbering?
mustn't he have been unlimbering?
mustn't we have been unlimbering?
mustn't you have been unlimbering?
mustn't they have been unlimbering?