English verb conjugation
MUST SUN

Regular verb: sun - sunned - sunned

Affirmation

Simple form	V-ing form
I must sun you must sun he must sun we must sun you must sun they must sun	I must be sunning you must be sunning he must be sunning we must be sunning you must be sunning they must be sunning
Perfect	V-ing perfect
I must have sunned you must have sunned he must have sunned we must have sunned you must have sunned they must have sunned	I must have been sunning you must have been sunning he must have been sunning we must have been sunning you must have been sunning they must have been sunning

Negation

Simple form	V-ing form
I mustn't sun you mustn't sun he mustn't sun we mustn't sun you mustn't sun they mustn't sun	I mustn't be sunning you mustn't be sunning he mustn't be sunning we mustn't be sunning you mustn't be sunning they mustn't be sunning
Perfect	V-ing perfect
I mustn't have sunned you mustn't have sunned he mustn't have sunned we mustn't have sunned you mustn't have sunned they mustn't have sunned	I mustn't have been sunning you mustn't have been sunning he mustn't have been sunning we mustn't have been sunning you mustn't have been sunning they mustn't have been sunning

Interrogative form

Simple form	V-ing form
must I sun? must you sun? must he sun? must we sun? must you sun? must they sun?	must I be sunning? must you be sunning? must he be sunning? must we be sunning? must you be sunning? must they be sunning?
Perfect	V-ing perfect
must I have sunned? must you have sunned? must he have sunned? must we have sunned? must you have sunned? must they have sunned?	must I have been sunning? must you have been sunning? must he have been sunning? must we have been sunning? must you have been sunning? must they have been sunning?

Interro-negative form

Simple form	V-ing form
mustn't I sun? mustn't you sun? mustn't he sun? mustn't we sun? mustn't you sun? mustn't they sun?	mustn't I be sunning? mustn't you be sunning? mustn't he be sunning? mustn't we be sunning? mustn't you be sunning? mustn't they be sunning?
Perfect	V-ing perfect
mustn't I have sunned? mustn't you have sunned? mustn't he have sunned? mustn't we have sunned? mustn't you have sunned? mustn't they have sunned?	mustn't I have been sunning? mustn't you have been sunning? mustn't he have been sunning? mustn't we have been sunning? mustn't you have been sunning? mustn't they have been sunning?