English verb conjugation
MUST BLACK

Regular verb: black - blacked - blacked

Affirmation

Simple form	V-ing form
I must black you must black he must black we must black you must black they must black	I must be blacking you must be blacking he must be blacking we must be blacking you must be blacking they must be blacking
Perfect	V-ing perfect
I must have blacked you must have blacked he must have blacked we must have blacked you must have blacked they must have blacked	I must have been blacking you must have been blacking he must have been blacking we must have been blacking you must have been blacking they must have been blacking

Negation

Simple form	V-ing form
I must not black you must not black he must not black we must not black you must not black they must not black	I must not be blacking you must not be blacking he must not be blacking we must not be blacking you must not be blacking they must not be blacking
Perfect	V-ing perfect
I must not have blacked you must not have blacked he must not have blacked we must not have blacked you must not have blacked they must not have blacked	I must not have been blacking you must not have been blacking he must not have been blacking we must not have been blacking you must not have been blacking they must not have been blacking

Interrogative form

Simple form	V-ing form
must I black? must you black? must he black? must we black? must you black? must they black?	must I be blacking? must you be blacking? must he be blacking? must we be blacking? must you be blacking? must they be blacking?
Perfect	V-ing perfect
must I have blacked? must you have blacked? must he have blacked? must we have blacked? must you have blacked? must they have blacked?	must I have been blacking? must you have been blacking? must he have been blacking? must we have been blacking? must you have been blacking? must they have been blacking?

Interro-negative form

Simple form	V-ing form
must I not black? must you not black? must he not black? must we not black? must you not black? must they not black?	must I not be blacking? must you not be blacking? must he not be blacking? must we not be blacking? must you not be blacking? must they not be blacking?
Perfect	V-ing perfect
must I not have blacked? must you not have blacked? must he not have blacked? must we not have blacked? must you not have blacked? must they not have blacked?	must I not have been blacking? must you not have been blacking? must he not have been blacking? must we not have been blacking? must you not have been blacking? must they not have been blacking?