English verb conjugation
MUST FORDO

Irregular verb: fordo - fordid - fordone

Affirmation

Simple form	V-ing form
I must fordo you must fordo she must fordo we must fordo you must fordo they must fordo	I must be fordoing you must be fordoing she 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 she 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 she 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 mustn't fordo you mustn't fordo she mustn't fordo we mustn't fordo you mustn't fordo they mustn't fordo	I mustn't be fordoing you mustn't be fordoing she mustn't be fordoing we mustn't be fordoing you mustn't be fordoing they mustn't be fordoing
Perfect	V-ing perfect
I mustn't have fordone you mustn't have fordone she mustn't have fordone we mustn't have fordone you mustn't have fordone they mustn't have fordone	I mustn't have been fordoing you mustn't have been fordoing she mustn't have been fordoing we mustn't have been fordoing you mustn't have been fordoing they mustn't have been fordoing

Interrogative form

Simple form	V-ing form
must I fordo? must you fordo? must she fordo? must we fordo? must you fordo? must they fordo?	must I be fordoing? must you be fordoing? must she 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 she 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 she 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
mustn't I fordo? mustn't you fordo? mustn't she fordo? mustn't we fordo? mustn't you fordo? mustn't they fordo?	mustn't I be fordoing? mustn't you be fordoing? mustn't she be fordoing? mustn't we be fordoing? mustn't you be fordoing? mustn't they be fordoing?
Perfect	V-ing perfect
mustn't I have fordone? mustn't you have fordone? mustn't she have fordone? mustn't we have fordone? mustn't you have fordone? mustn't they have fordone?	mustn't I have been fordoing? mustn't you have been fordoing? mustn't she have been fordoing? mustn't we have been fordoing? mustn't you have been fordoing? mustn't they have been fordoing?