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 could not slum
you could not slum
he could not slum
we could not slum
you could not slum
they could not slum 	I could not be sluming
you could not be sluming
he could not be sluming
we could not be sluming
you could not be sluming
they could not be sluming	I could not have slumed
you could not have slumed
he could not have slumed
we could not have slumed
you could not have slumed
they could not have slumed	I could not have been sluming
you could not have been sluming
he could not have been sluming
we could not have been sluming
you could not have been sluming
they could not 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 	
could I not slum?
could you not slum?
could he not slum?
could we not slum?
could you not slum?
could they not slum? 	could I not be sluming?
could you not be sluming?
could he not be sluming?
could we not be sluming?
could you not be sluming?
could they not be sluming? 	could I not have slumed?
could you not have slumed?
could he not have slumed?
could we not have slumed?
could you not have slumed?
could they not have slumed? 	could I not have been sluming?
could you not have been sluming?
could he not have been sluming?
could we not have been sluming?
could you not have been sluming?
could they not have been sluming?