must unsheathe
Regular verb: unsheathe - unsheathed- unsheathed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unsheathe
you must unsheathe
he must unsheathe
we must unsheathe
you must unsheathe
they must unsheathe 	I must be unsheathing
you must be unsheathing
he must be unsheathing
we must be unsheathing
you must be unsheathing
they must be unsheathing	I must have unsheathed
you must have unsheathed
he must have unsheathed
we must have unsheathed
you must have unsheathed
they must have unsheathed	I must have been unsheathing
you must have been unsheathing
he must have been unsheathing
we must have been unsheathing
you must have been unsheathing
they must have been unsheathing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not unsheathe
you must not unsheathe
he must not unsheathe
we must not unsheathe
you must not unsheathe
they must not unsheathe 	I must not be unsheathing
you must not be unsheathing
he must not be unsheathing
we must not be unsheathing
you must not be unsheathing
they must not be unsheathing	I must not have unsheathed
you must not have unsheathed
he must not have unsheathed
we must not have unsheathed
you must not have unsheathed
they must not have unsheathed	I must not have been unsheathing
you must not have been unsheathing
he must not have been unsheathing
we must not have been unsheathing
you must not have been unsheathing
they must not have been unsheathing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unsheathe?
must you unsheathe?
must he unsheathe?
must we unsheathe?
must you unsheathe?
must they unsheathe? 	must I be unsheathing?
must you be unsheathing?
must he be unsheathing?
must we be unsheathing?
must you be unsheathing?
must they be unsheathing? 	must I have unsheathed?
must you have unsheathed?
must he have unsheathed?
must we have unsheathed?
must you have unsheathed?
must they have unsheathed? 	must I have been unsheathing?
must you have been unsheathing?
must he have been unsheathing?
must we have been unsheathing?
must you have been unsheathing?
must they have been unsheathing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not unsheathe?
must you not unsheathe?
must he not unsheathe?
must we not unsheathe?
must you not unsheathe?
must they not unsheathe? 	must I not be unsheathing?
must you not be unsheathing?
must he not be unsheathing?
must we not be unsheathing?
must you not be unsheathing?
must they not be unsheathing? 	must I not have unsheathed?
must you not have unsheathed?
must he not have unsheathed?
must we not have unsheathed?
must you not have unsheathed?
must they not have unsheathed? 	must I not have been unsheathing?
must you not have been unsheathing?
must he not have been unsheathing?
must we not have been unsheathing?
must you not have been unsheathing?
must they not have been unsheathing?