English verb conjugation
MUST FUN

Regular verb: fun - funed - funed

Affirmation

Simple form	V-ing form
I must fun you must fun he must fun we must fun you must fun they must fun	I must be funing you must be funing he must be funing we must be funing you must be funing they must be funing
Perfect	V-ing perfect
I must have funed you must have funed he must have funed we must have funed you must have funed they must have funed	I must have been funing you must have been funing he must have been funing we must have been funing you must have been funing they must have been funing

Negation

Simple form	V-ing form
I must not fun you must not fun he must not fun we must not fun you must not fun they must not fun	I must not be funing you must not be funing he must not be funing we must not be funing you must not be funing they must not be funing
Perfect	V-ing perfect
I must not have funed you must not have funed he must not have funed we must not have funed you must not have funed they must not have funed	I must not have been funing you must not have been funing he must not have been funing we must not have been funing you must not have been funing they must not have been funing

Interrogative form

Simple form	V-ing form
must I fun? must you fun? must he fun? must we fun? must you fun? must they fun?	must I be funing? must you be funing? must he be funing? must we be funing? must you be funing? must they be funing?
Perfect	V-ing perfect
must I have funed? must you have funed? must he have funed? must we have funed? must you have funed? must they have funed?	must I have been funing? must you have been funing? must he have been funing? must we have been funing? must you have been funing? must they have been funing?

Interro-negative form

Simple form	V-ing form
must I not fun? must you not fun? must he not fun? must we not fun? must you not fun? must they not fun?	must I not be funing? must you not be funing? must he not be funing? must we not be funing? must you not be funing? must they not be funing?
Perfect	V-ing perfect
must I not have funed? must you not have funed? must he not have funed? must we not have funed? must you not have funed? must they not have funed?	must I not have been funing? must you not have been funing? must he not have been funing? must we not have been funing? must you not have been funing? must they not have been funing?