must fissure
Regular verb: fissure - fissured- fissured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?