English verb conjugation
MUST UNSHEATHE

Regular verb: unsheathe - unsheathed - unsheathed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?