English verb conjugation
MUST BLACK

Regular verb: black - blacked - blacked

Affirmation

Simple form	V-ing form
I must black you must black she must black we must black you must black they must black	I must be blacking you must be blacking she 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 she 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 she 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 she 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 she 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 she 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 she 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 she black? must we black? must you black? must they black?	must I be blacking? must you be blacking? must she 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 she 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 she 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 she 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 she 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 she 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 she not have been blacking? must we not have been blacking? must you not have been blacking? must they not have been blacking?