could culm
Regular verb: culm - culmed- culmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could culm
you could culm
he could culm
we could culm
you could culm
they could culm 	I could be culming
you could be culming
he could be culming
we could be culming
you could be culming
they could be culming	I could have culmed
you could have culmed
he could have culmed
we could have culmed
you could have culmed
they could have culmed	I could have been culming
you could have been culming
he could have been culming
we could have been culming
you could have been culming
they could have been culming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't culm
you couldn't culm
he couldn't culm
we couldn't culm
you couldn't culm
they couldn't culm 	I couldn't be culming
you couldn't be culming
he couldn't be culming
we couldn't be culming
you couldn't be culming
they couldn't be culming	I couldn't have culmed
you couldn't have culmed
he couldn't have culmed
we couldn't have culmed
you couldn't have culmed
they couldn't have culmed	I couldn't have been culming
you couldn't have been culming
he couldn't have been culming
we couldn't have been culming
you couldn't have been culming
they couldn't have been culming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I culm?
could you culm?
could he culm?
could we culm?
could you culm?
could they culm? 	could I be culming?
could you be culming?
could he be culming?
could we be culming?
could you be culming?
could they be culming? 	could I have culmed?
could you have culmed?
could he have culmed?
could we have culmed?
could you have culmed?
could they have culmed? 	could I have been culming?
could you have been culming?
could he have been culming?
could we have been culming?
could you have been culming?
could they have been culming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I culm?
couldn't you culm?
couldn't he culm?
couldn't we culm?
couldn't you culm?
couldn't they culm? 	couldn't I be culming?
couldn't you be culming?
couldn't he be culming?
couldn't we be culming?
couldn't you be culming?
couldn't they be culming? 	couldn't I have culmed?
couldn't you have culmed?
couldn't he have culmed?
couldn't we have culmed?
couldn't you have culmed?
couldn't they have culmed? 	couldn't I have been culming?
couldn't you have been culming?
couldn't he have been culming?
couldn't we have been culming?
couldn't you have been culming?
couldn't they have been culming?