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 must not fissure you must not fissure he must not fissure we must not fissure you must not fissure they must not fissure	I must not be fissuring you must not be fissuring he must not be fissuring we must not be fissuring you must not be fissuring they must not be fissuring
Perfect	V-ing perfect
I must not have fissured you must not have fissured he must not have fissured we must not have fissured you must not have fissured they must not have fissured	I must not have been fissuring you must not have been fissuring he must not have been fissuring we must not have been fissuring you must not have been fissuring they must not 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
must I not fissure? must you not fissure? must he not fissure? must we not fissure? must you not fissure? must they not fissure?	must I not be fissuring? must you not be fissuring? must he not be fissuring? must we not be fissuring? must you not be fissuring? must they not be fissuring?
Perfect	V-ing perfect
must I not have fissured? must you not have fissured? must he not have fissured? must we not have fissured? must you not have fissured? must they not have fissured?	must I not have been fissuring? must you not have been fissuring? must he not have been fissuring? must we not have been fissuring? must you not have been fissuring? must they not have been fissuring?