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 mustn't black you mustn't black she mustn't black we mustn't black you mustn't black they mustn't black	I mustn't be blacking you mustn't be blacking she mustn't be blacking we mustn't be blacking you mustn't be blacking they mustn't be blacking
Perfect	V-ing perfect
I mustn't have blacked you mustn't have blacked she mustn't have blacked we mustn't have blacked you mustn't have blacked they mustn't have blacked	I mustn't have been blacking you mustn't have been blacking she mustn't have been blacking we mustn't have been blacking you mustn't have been blacking they mustn't 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
mustn't I black? mustn't you black? mustn't she black? mustn't we black? mustn't you black? mustn't they black?	mustn't I be blacking? mustn't you be blacking? mustn't she be blacking? mustn't we be blacking? mustn't you be blacking? mustn't they be blacking?
Perfect	V-ing perfect
mustn't I have blacked? mustn't you have blacked? mustn't she have blacked? mustn't we have blacked? mustn't you have blacked? mustn't they have blacked?	mustn't I have been blacking? mustn't you have been blacking? mustn't she have been blacking? mustn't we have been blacking? mustn't you have been blacking? mustn't they have been blacking?