must fissure
Regular verb: fissure - fissured- fissured

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