could slum
Regular verb: slum - slumed- slumed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could slum
you could slum
he could slum
we could slum
you could slum
they could slum 	I could be sluming
you could be sluming
he could be sluming
we could be sluming
you could be sluming
they could be sluming	I could have slumed
you could have slumed
he could have slumed
we could have slumed
you could have slumed
they could have slumed	I could have been sluming
you could have been sluming
he could have been sluming
we could have been sluming
you could have been sluming
they could have been sluming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't slum
you couldn't slum
he couldn't slum
we couldn't slum
you couldn't slum
they couldn't slum 	I couldn't be sluming
you couldn't be sluming
he couldn't be sluming
we couldn't be sluming
you couldn't be sluming
they couldn't be sluming	I couldn't have slumed
you couldn't have slumed
he couldn't have slumed
we couldn't have slumed
you couldn't have slumed
they couldn't have slumed	I couldn't have been sluming
you couldn't have been sluming
he couldn't have been sluming
we couldn't have been sluming
you couldn't have been sluming
they couldn't have been sluming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I slum?
could you slum?
could he slum?
could we slum?
could you slum?
could they slum? 	could I be sluming?
could you be sluming?
could he be sluming?
could we be sluming?
could you be sluming?
could they be sluming? 	could I have slumed?
could you have slumed?
could he have slumed?
could we have slumed?
could you have slumed?
could they have slumed? 	could I have been sluming?
could you have been sluming?
could he have been sluming?
could we have been sluming?
could you have been sluming?
could they have been sluming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I slum?
couldn't you slum?
couldn't he slum?
couldn't we slum?
couldn't you slum?
couldn't they slum? 	couldn't I be sluming?
couldn't you be sluming?
couldn't he be sluming?
couldn't we be sluming?
couldn't you be sluming?
couldn't they be sluming? 	couldn't I have slumed?
couldn't you have slumed?
couldn't he have slumed?
couldn't we have slumed?
couldn't you have slumed?
couldn't they have slumed? 	couldn't I have been sluming?
couldn't you have been sluming?
couldn't he have been sluming?
couldn't we have been sluming?
couldn't you have been sluming?
couldn't they have been sluming?