could fissure
Regular verb: fissure - fissured- fissured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fissure
you could fissure
she could fissure
we could fissure
you could fissure
they could fissure 	I could be fissuring
you could be fissuring
she could be fissuring
we could be fissuring
you could be fissuring
they could be fissuring	I could have fissured
you could have fissured
she could have fissured
we could have fissured
you could have fissured
they could have fissured	I could have been fissuring
you could have been fissuring
she could have been fissuring
we could have been fissuring
you could have been fissuring
they could have been fissuring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't fissure
you couldn't fissure
she couldn't fissure
we couldn't fissure
you couldn't fissure
they couldn't fissure 	I couldn't be fissuring
you couldn't be fissuring
she couldn't be fissuring
we couldn't be fissuring
you couldn't be fissuring
they couldn't be fissuring	I couldn't have fissured
you couldn't have fissured
she couldn't have fissured
we couldn't have fissured
you couldn't have fissured
they couldn't have fissured	I couldn't have been fissuring
you couldn't have been fissuring
she couldn't have been fissuring
we couldn't have been fissuring
you couldn't have been fissuring
they couldn't have been fissuring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fissure?
could you fissure?
could she fissure?
could we fissure?
could you fissure?
could they fissure? 	could I be fissuring?
could you be fissuring?
could she be fissuring?
could we be fissuring?
could you be fissuring?
could they be fissuring? 	could I have fissured?
could you have fissured?
could she have fissured?
could we have fissured?
could you have fissured?
could they have fissured? 	could I have been fissuring?
could you have been fissuring?
could she have been fissuring?
could we have been fissuring?
could you have been fissuring?
could they have been fissuring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I fissure?
couldn't you fissure?
couldn't she fissure?
couldn't we fissure?
couldn't you fissure?
couldn't they fissure? 	couldn't I be fissuring?
couldn't you be fissuring?
couldn't she be fissuring?
couldn't we be fissuring?
couldn't you be fissuring?
couldn't they be fissuring? 	couldn't I have fissured?
couldn't you have fissured?
couldn't she have fissured?
couldn't we have fissured?
couldn't you have fissured?
couldn't they have fissured? 	couldn't I have been fissuring?
couldn't you have been fissuring?
couldn't she have been fissuring?
couldn't we have been fissuring?
couldn't you have been fissuring?
couldn't they have been fissuring?