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