English verb conjugation
MUST FISSURE

Regular verb: fissure - fissured - fissured

Affirmation

Simple form	V-ing form
I must fissure you must fissure he must fissure we must fissure you must fissure they must fissure	I must be fissuring you must be fissuring he must be fissuring we must be fissuring you must be fissuring they must be fissuring
Perfect	V-ing perfect
I must have fissured you must have fissured he must have fissured we must have fissured you must have fissured they must have fissured	I must have been fissuring you must have been fissuring he must have been fissuring we must have been fissuring you must have been fissuring they must have been fissuring

Negation

Simple form	V-ing form
I mustn't fissure you mustn't fissure he mustn't fissure we mustn't fissure you mustn't fissure they mustn't fissure	I mustn't be fissuring you mustn't be fissuring he mustn't be fissuring we mustn't be fissuring you mustn't be fissuring they mustn't be fissuring
Perfect	V-ing perfect
I mustn't have fissured you mustn't have fissured he mustn't have fissured we mustn't have fissured you mustn't have fissured they mustn't have fissured	I mustn't have been fissuring you mustn't have been fissuring he mustn't have been fissuring we mustn't have been fissuring you mustn't have been fissuring they mustn't have been fissuring

Interrogative form

Simple form	V-ing form
must I fissure? must you fissure? must he fissure? must we fissure? must you fissure? must they fissure?	must I be fissuring? must you be fissuring? must he be fissuring? must we be fissuring? must you be fissuring? must they be fissuring?
Perfect	V-ing perfect
must I have fissured? must you have fissured? must he have fissured? must we have fissured? must you have fissured? must they have fissured?	must I have been fissuring? must you have been fissuring? must he have been fissuring? must we have been fissuring? must you have been fissuring? must they have been fissuring?

Interro-negative form

Simple form	V-ing form
mustn't I fissure? mustn't you fissure? mustn't he fissure? mustn't we fissure? mustn't you fissure? mustn't they fissure?	mustn't I be fissuring? mustn't you be fissuring? mustn't he be fissuring? mustn't we be fissuring? mustn't you be fissuring? mustn't they be fissuring?
Perfect	V-ing perfect
mustn't I have fissured? mustn't you have fissured? mustn't he have fissured? mustn't we have fissured? mustn't you have fissured? mustn't they have fissured?	mustn't I have been fissuring? mustn't you have been fissuring? mustn't he have been fissuring? mustn't we have been fissuring? mustn't you have been fissuring? mustn't they have been fissuring?