I can slam you can slam he can slam we can slam you can slam they can slam
V-ing form
I can be slamming you can be slamming he can be slamming we can be slamming you can be slamming they can be slamming
Perfect
I can have slammed you can have slammed he can have slammed we can have slammed you can have slammed they can have slammed
V-ing perfect
I can have been slamming you can have been slamming he can have been slamming we can have been slamming you can have been slamming they can have been slamming
Negation
Simple form
I can't slam you can't slam he can't slam we can't slam you can't slam they can't slam
V-ing form
I can't be slamming you can't be slamming he can't be slamming we can't be slamming you can't be slamming they can't be slamming
Perfect
I can't have slammed you can't have slammed he can't have slammed we can't have slammed you can't have slammed they can't have slammed
V-ing perfect
I can't have been slamming you can't have been slamming he can't have been slamming we can't have been slamming you can't have been slamming they can't have been slamming
Interrogative form
Simple form
can I slam? can you slam? can he slam? can we slam? can you slam? can they slam?
V-ing form
can I be slamming? can you be slamming? can he be slamming? can we be slamming? can you be slamming? can they be slamming?
Perfect
can I have slammed? can you have slammed? can he have slammed? can we have slammed? can you have slammed? can they have slammed?
V-ing perfect
can I have been slamming? can you have been slamming? can he have been slamming? can we have been slamming? can you have been slamming? can they have been slamming?
Interro-negative form
Simple form
can't I slam? can't you slam? can't he slam? can't we slam? can't you slam? can't they slam?
V-ing form
can't I be slamming? can't you be slamming? can't he be slamming? can't we be slamming? can't you be slamming? can't they be slamming?
Perfect
can't I have slammed? can't you have slammed? can't he have slammed? can't we have slammed? can't you have slammed? can't they have slammed?
V-ing perfect
can't I have been slamming? can't you have been slamming? can't he have been slamming? can't we have been slamming? can't you have been slamming? can't they have been slamming?