English verb conjugation
MUST FABLE

Regular verb: fable - fabled - fabled

Affirmation

Simple form	V-ing form
I must fable you must fable she must fable we must fable you must fable they must fable	I must be fabling you must be fabling she 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 she 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 she 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 she 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 she 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 she 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 she 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 she fable? must we fable? must you fable? must they fable?	must I be fabling? must you be fabling? must she 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 she 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 she 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 she 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 she 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 she 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 she have been fabling? mustn't we have been fabling? mustn't you have been fabling? mustn't they have been fabling?