I can slum you can slum she can slum we can slum you can slum they can slum
V-ing form
I can be sluming you can be sluming she can be sluming we can be sluming you can be sluming they can be sluming
Perfect
I can have slumed you can have slumed she can have slumed we can have slumed you can have slumed they can have slumed
V-ing perfect
I can have been sluming you can have been sluming she can have been sluming we can have been sluming you can have been sluming they can have been sluming
Negation
Simple form
I cannot slum you cannot slum she cannot slum we cannot slum you cannot slum they cannot slum
V-ing form
I cannot be sluming you cannot be sluming she cannot be sluming we cannot be sluming you cannot be sluming they cannot be sluming
Perfect
I cannot have slumed you cannot have slumed she cannot have slumed we cannot have slumed you cannot have slumed they cannot have slumed
V-ing perfect
I cannot have been sluming you cannot have been sluming she cannot have been sluming we cannot have been sluming you cannot have been sluming they cannot have been sluming
Interrogative form
Simple form
can I slum? can you slum? can she slum? can we slum? can you slum? can they slum?
V-ing form
can I be sluming? can you be sluming? can she be sluming? can we be sluming? can you be sluming? can they be sluming?
Perfect
can I have slumed? can you have slumed? can she have slumed? can we have slumed? can you have slumed? can they have slumed?
V-ing perfect
can I have been sluming? can you have been sluming? can she have been sluming? can we have been sluming? can you have been sluming? can they have been sluming?
Interro-negative form
Simple form
can I not slum? can you not slum? can she not slum? can we not slum? can you not slum? can they not slum?
V-ing form
can I not be sluming? can you not be sluming? can she not be sluming? can we not be sluming? can you not be sluming? can they not be sluming?
Perfect
can I not have slumed? can you not have slumed? can she not have slumed? can we not have slumed? can you not have slumed? can they not have slumed?
V-ing perfect
can I not have been sluming? can you not have been sluming? can she not have been sluming? can we not have been sluming? can you not have been sluming? can they not have been sluming?