English verb conjugation
MUST CLASSIFY

Regular verb: classify - classified - classified

Affirmation

Simple form	V-ing form
I must classify you must classify she must classify we must classify you must classify they must classify	I must be classifying you must be classifying she must be classifying we must be classifying you must be classifying they must be classifying
Perfect	V-ing perfect
I must have classified you must have classified she must have classified we must have classified you must have classified they must have classified	I must have been classifying you must have been classifying she must have been classifying we must have been classifying you must have been classifying they must have been classifying

Negation

Simple form	V-ing form
I mustn't classify you mustn't classify she mustn't classify we mustn't classify you mustn't classify they mustn't classify	I mustn't be classifying you mustn't be classifying she mustn't be classifying we mustn't be classifying you mustn't be classifying they mustn't be classifying
Perfect	V-ing perfect
I mustn't have classified you mustn't have classified she mustn't have classified we mustn't have classified you mustn't have classified they mustn't have classified	I mustn't have been classifying you mustn't have been classifying she mustn't have been classifying we mustn't have been classifying you mustn't have been classifying they mustn't have been classifying

Interrogative form

Simple form	V-ing form
must I classify? must you classify? must she classify? must we classify? must you classify? must they classify?	must I be classifying? must you be classifying? must she be classifying? must we be classifying? must you be classifying? must they be classifying?
Perfect	V-ing perfect
must I have classified? must you have classified? must she have classified? must we have classified? must you have classified? must they have classified?	must I have been classifying? must you have been classifying? must she have been classifying? must we have been classifying? must you have been classifying? must they have been classifying?

Interro-negative form

Simple form	V-ing form
mustn't I classify? mustn't you classify? mustn't she classify? mustn't we classify? mustn't you classify? mustn't they classify?	mustn't I be classifying? mustn't you be classifying? mustn't she be classifying? mustn't we be classifying? mustn't you be classifying? mustn't they be classifying?
Perfect	V-ing perfect
mustn't I have classified? mustn't you have classified? mustn't she have classified? mustn't we have classified? mustn't you have classified? mustn't they have classified?	mustn't I have been classifying? mustn't you have been classifying? mustn't she have been classifying? mustn't we have been classifying? mustn't you have been classifying? mustn't they have been classifying?