English verb conjugation
MUST MACHINE-GUN

Regular verb: machine-gun - machine-guned - machine-guned

Affirmation

Simple form	V-ing form
I must machine-gun you must machine-gun he must machine-gun we must machine-gun you must machine-gun they must machine-gun	I must be machine-guning you must be machine-guning he must be machine-guning we must be machine-guning you must be machine-guning they must be machine-guning
Perfect	V-ing perfect
I must have machine-guned you must have machine-guned he must have machine-guned we must have machine-guned you must have machine-guned they must have machine-guned	I must have been machine-guning you must have been machine-guning he must have been machine-guning we must have been machine-guning you must have been machine-guning they must have been machine-guning

Negation

Simple form	V-ing form
I mustn't machine-gun you mustn't machine-gun he mustn't machine-gun we mustn't machine-gun you mustn't machine-gun they mustn't machine-gun	I mustn't be machine-guning you mustn't be machine-guning he mustn't be machine-guning we mustn't be machine-guning you mustn't be machine-guning they mustn't be machine-guning
Perfect	V-ing perfect
I mustn't have machine-guned you mustn't have machine-guned he mustn't have machine-guned we mustn't have machine-guned you mustn't have machine-guned they mustn't have machine-guned	I mustn't have been machine-guning you mustn't have been machine-guning he mustn't have been machine-guning we mustn't have been machine-guning you mustn't have been machine-guning they mustn't have been machine-guning

Interrogative form

Simple form	V-ing form
must I machine-gun? must you machine-gun? must he machine-gun? must we machine-gun? must you machine-gun? must they machine-gun?	must I be machine-guning? must you be machine-guning? must he be machine-guning? must we be machine-guning? must you be machine-guning? must they be machine-guning?
Perfect	V-ing perfect
must I have machine-guned? must you have machine-guned? must he have machine-guned? must we have machine-guned? must you have machine-guned? must they have machine-guned?	must I have been machine-guning? must you have been machine-guning? must he have been machine-guning? must we have been machine-guning? must you have been machine-guning? must they have been machine-guning?

Interro-negative form

Simple form	V-ing form
mustn't I machine-gun? mustn't you machine-gun? mustn't he machine-gun? mustn't we machine-gun? mustn't you machine-gun? mustn't they machine-gun?	mustn't I be machine-guning? mustn't you be machine-guning? mustn't he be machine-guning? mustn't we be machine-guning? mustn't you be machine-guning? mustn't they be machine-guning?
Perfect	V-ing perfect
mustn't I have machine-guned? mustn't you have machine-guned? mustn't he have machine-guned? mustn't we have machine-guned? mustn't you have machine-guned? mustn't they have machine-guned?	mustn't I have been machine-guning? mustn't you have been machine-guning? mustn't he have been machine-guning? mustn't we have been machine-guning? mustn't you have been machine-guning? mustn't they have been machine-guning?