English verb conjugation
MUST UNDERSTOCK

Regular verb: understock - understocked - understocked

Affirmation

Simple form	V-ing form
I must understock you must understock he must understock we must understock you must understock they must understock	I must be understocking you must be understocking he must be understocking we must be understocking you must be understocking they must be understocking
Perfect	V-ing perfect
I must have understocked you must have understocked he must have understocked we must have understocked you must have understocked they must have understocked	I must have been understocking you must have been understocking he must have been understocking we must have been understocking you must have been understocking they must have been understocking

Negation

Simple form	V-ing form
I must not understock you must not understock he must not understock we must not understock you must not understock they must not understock	I must not be understocking you must not be understocking he must not be understocking we must not be understocking you must not be understocking they must not be understocking
Perfect	V-ing perfect
I must not have understocked you must not have understocked he must not have understocked we must not have understocked you must not have understocked they must not have understocked	I must not have been understocking you must not have been understocking he must not have been understocking we must not have been understocking you must not have been understocking they must not have been understocking

Interrogative form

Simple form	V-ing form
must I understock? must you understock? must he understock? must we understock? must you understock? must they understock?	must I be understocking? must you be understocking? must he be understocking? must we be understocking? must you be understocking? must they be understocking?
Perfect	V-ing perfect
must I have understocked? must you have understocked? must he have understocked? must we have understocked? must you have understocked? must they have understocked?	must I have been understocking? must you have been understocking? must he have been understocking? must we have been understocking? must you have been understocking? must they have been understocking?

Interro-negative form

Simple form	V-ing form
must I not understock? must you not understock? must he not understock? must we not understock? must you not understock? must they not understock?	must I not be understocking? must you not be understocking? must he not be understocking? must we not be understocking? must you not be understocking? must they not be understocking?
Perfect	V-ing perfect
must I not have understocked? must you not have understocked? must he not have understocked? must we not have understocked? must you not have understocked? must they not have understocked?	must I not have been understocking? must you not have been understocking? must he not have been understocking? must we not have been understocking? must you not have been understocking? must they not have been understocking?