English verb conjugation
MUST FORDO

Irregular verb: fordo - fordid - fordone

Affirmation

Simple form	V-ing form
I must fordo you must fordo he must fordo we must fordo you must fordo they must fordo	I must be fordoing you must be fordoing he must be fordoing we must be fordoing you must be fordoing they must be fordoing
Perfect	V-ing perfect
I must have fordone you must have fordone he must have fordone we must have fordone you must have fordone they must have fordone	I must have been fordoing you must have been fordoing he must have been fordoing we must have been fordoing you must have been fordoing they must have been fordoing

Negation

Simple form	V-ing form
I must not fordo you must not fordo he must not fordo we must not fordo you must not fordo they must not fordo	I must not be fordoing you must not be fordoing he must not be fordoing we must not be fordoing you must not be fordoing they must not be fordoing
Perfect	V-ing perfect
I must not have fordone you must not have fordone he must not have fordone we must not have fordone you must not have fordone they must not have fordone	I must not have been fordoing you must not have been fordoing he must not have been fordoing we must not have been fordoing you must not have been fordoing they must not have been fordoing

Interrogative form

Simple form	V-ing form
must I fordo? must you fordo? must he fordo? must we fordo? must you fordo? must they fordo?	must I be fordoing? must you be fordoing? must he be fordoing? must we be fordoing? must you be fordoing? must they be fordoing?
Perfect	V-ing perfect
must I have fordone? must you have fordone? must he have fordone? must we have fordone? must you have fordone? must they have fordone?	must I have been fordoing? must you have been fordoing? must he have been fordoing? must we have been fordoing? must you have been fordoing? must they have been fordoing?

Interro-negative form

Simple form	V-ing form
must I not fordo? must you not fordo? must he not fordo? must we not fordo? must you not fordo? must they not fordo?	must I not be fordoing? must you not be fordoing? must he not be fordoing? must we not be fordoing? must you not be fordoing? must they not be fordoing?
Perfect	V-ing perfect
must I not have fordone? must you not have fordone? must he not have fordone? must we not have fordone? must you not have fordone? must they not have fordone?	must I not have been fordoing? must you not have been fordoing? must he not have been fordoing? must we not have been fordoing? must you not have been fordoing? must they not have been fordoing?