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