English verb conjugation
MUST CHARACTERIZE

Regular verb: characterize - characterized - characterized

Affirmation

Simple form	V-ing form
I must characterize you must characterize he must characterize we must characterize you must characterize they must characterize	I must be characterizing you must be characterizing he must be characterizing we must be characterizing you must be characterizing they must be characterizing
Perfect	V-ing perfect
I must have characterized you must have characterized he must have characterized we must have characterized you must have characterized they must have characterized	I must have been characterizing you must have been characterizing he must have been characterizing we must have been characterizing you must have been characterizing they must have been characterizing

Negation

Simple form	V-ing form
I mustn't characterize you mustn't characterize he mustn't characterize we mustn't characterize you mustn't characterize they mustn't characterize	I mustn't be characterizing you mustn't be characterizing he mustn't be characterizing we mustn't be characterizing you mustn't be characterizing they mustn't be characterizing
Perfect	V-ing perfect
I mustn't have characterized you mustn't have characterized he mustn't have characterized we mustn't have characterized you mustn't have characterized they mustn't have characterized	I mustn't have been characterizing you mustn't have been characterizing he mustn't have been characterizing we mustn't have been characterizing you mustn't have been characterizing they mustn't have been characterizing

Interrogative form

Simple form	V-ing form
must I characterize? must you characterize? must he characterize? must we characterize? must you characterize? must they characterize?	must I be characterizing? must you be characterizing? must he be characterizing? must we be characterizing? must you be characterizing? must they be characterizing?
Perfect	V-ing perfect
must I have characterized? must you have characterized? must he have characterized? must we have characterized? must you have characterized? must they have characterized?	must I have been characterizing? must you have been characterizing? must he have been characterizing? must we have been characterizing? must you have been characterizing? must they have been characterizing?

Interro-negative form

Simple form	V-ing form
mustn't I characterize? mustn't you characterize? mustn't he characterize? mustn't we characterize? mustn't you characterize? mustn't they characterize?	mustn't I be characterizing? mustn't you be characterizing? mustn't he be characterizing? mustn't we be characterizing? mustn't you be characterizing? mustn't they be characterizing?
Perfect	V-ing perfect
mustn't I have characterized? mustn't you have characterized? mustn't he have characterized? mustn't we have characterized? mustn't you have characterized? mustn't they have characterized?	mustn't I have been characterizing? mustn't you have been characterizing? mustn't he have been characterizing? mustn't we have been characterizing? mustn't you have been characterizing? mustn't they have been characterizing?