Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must change change you must change change he must change change we must change change you must change change they must change change
V-ing form
I must be change changing you must be change changing he must be change changing we must be change changing you must be change changing they must be change changing
Perfect
I must have change changed you must have change changed he must have change changed we must have change changed you must have change changed they must have change changed
V-ing perfect
I must have been change changing you must have been change changing he must have been change changing we must have been change changing you must have been change changing they must have been change changing
Negation
Simple form
I mustn't change change you mustn't change change he mustn't change change we mustn't change change you mustn't change change they mustn't change change
V-ing form
I mustn't be change changing you mustn't be change changing he mustn't be change changing we mustn't be change changing you mustn't be change changing they mustn't be change changing
Perfect
I mustn't have change changed you mustn't have change changed he mustn't have change changed we mustn't have change changed you mustn't have change changed they mustn't have change changed
V-ing perfect
I mustn't have been change changing you mustn't have been change changing he mustn't have been change changing we mustn't have been change changing you mustn't have been change changing they mustn't have been change changing
Interrogative form
Simple form
must I change change? must you change change? must he change change? must we change change? must you change change? must they change change?
V-ing form
must I be change changing? must you be change changing? must he be change changing? must we be change changing? must you be change changing? must they be change changing?
Perfect
must I have change changed? must you have change changed? must he have change changed? must we have change changed? must you have change changed? must they have change changed?
V-ing perfect
must I have been change changing? must you have been change changing? must he have been change changing? must we have been change changing? must you have been change changing? must they have been change changing?
Interro-negative form
Simple form
mustn't I change change? mustn't you change change? mustn't he change change? mustn't we change change? mustn't you change change? mustn't they change change?
V-ing form
mustn't I be change changing? mustn't you be change changing? mustn't he be change changing? mustn't we be change changing? mustn't you be change changing? mustn't they be change changing?
Perfect
mustn't I have change changed? mustn't you have change changed? mustn't he have change changed? mustn't we have change changed? mustn't you have change changed? mustn't they have change changed?
V-ing perfect
mustn't I have been change changing? mustn't you have been change changing? mustn't he have been change changing? mustn't we have been change changing? mustn't you have been change changing? mustn't they have been change changing?