English verb conjugation
MUST FABLE

Regular verb: fable - fabled - fabled

Affirmation

Simple form	V-ing form
I must fable you must fable he must fable we must fable you must fable they must fable	I must be fabling you must be fabling he must be fabling we must be fabling you must be fabling they must be fabling
Perfect	V-ing perfect
I must have fabled you must have fabled he must have fabled we must have fabled you must have fabled they must have fabled	I must have been fabling you must have been fabling he must have been fabling we must have been fabling you must have been fabling they must have been fabling

Negation

Simple form	V-ing form
I mustn't fable you mustn't fable he mustn't fable we mustn't fable you mustn't fable they mustn't fable	I mustn't be fabling you mustn't be fabling he mustn't be fabling we mustn't be fabling you mustn't be fabling they mustn't be fabling
Perfect	V-ing perfect
I mustn't have fabled you mustn't have fabled he mustn't have fabled we mustn't have fabled you mustn't have fabled they mustn't have fabled	I mustn't have been fabling you mustn't have been fabling he mustn't have been fabling we mustn't have been fabling you mustn't have been fabling they mustn't have been fabling

Interrogative form

Simple form	V-ing form
must I fable? must you fable? must he fable? must we fable? must you fable? must they fable?	must I be fabling? must you be fabling? must he be fabling? must we be fabling? must you be fabling? must they be fabling?
Perfect	V-ing perfect
must I have fabled? must you have fabled? must he have fabled? must we have fabled? must you have fabled? must they have fabled?	must I have been fabling? must you have been fabling? must he have been fabling? must we have been fabling? must you have been fabling? must they have been fabling?

Interro-negative form

Simple form	V-ing form
mustn't I fable? mustn't you fable? mustn't he fable? mustn't we fable? mustn't you fable? mustn't they fable?	mustn't I be fabling? mustn't you be fabling? mustn't he be fabling? mustn't we be fabling? mustn't you be fabling? mustn't they be fabling?
Perfect	V-ing perfect
mustn't I have fabled? mustn't you have fabled? mustn't he have fabled? mustn't we have fabled? mustn't you have fabled? mustn't they have fabled?	mustn't I have been fabling? mustn't you have been fabling? mustn't he have been fabling? mustn't we have been fabling? mustn't you have been fabling? mustn't they have been fabling?