I can drill you can drill he can drill we can drill you can drill they can drill
V-ing form
I can be drilling you can be drilling he can be drilling we can be drilling you can be drilling they can be drilling
Perfect
I can have drilled you can have drilled he can have drilled we can have drilled you can have drilled they can have drilled
V-ing perfect
I can have been drilling you can have been drilling he can have been drilling we can have been drilling you can have been drilling they can have been drilling
Negation
Simple form
I can't drill you can't drill he can't drill we can't drill you can't drill they can't drill
V-ing form
I can't be drilling you can't be drilling he can't be drilling we can't be drilling you can't be drilling they can't be drilling
Perfect
I can't have drilled you can't have drilled he can't have drilled we can't have drilled you can't have drilled they can't have drilled
V-ing perfect
I can't have been drilling you can't have been drilling he can't have been drilling we can't have been drilling you can't have been drilling they can't have been drilling
Interrogative form
Simple form
can I drill? can you drill? can he drill? can we drill? can you drill? can they drill?
V-ing form
can I be drilling? can you be drilling? can he be drilling? can we be drilling? can you be drilling? can they be drilling?
Perfect
can I have drilled? can you have drilled? can he have drilled? can we have drilled? can you have drilled? can they have drilled?
V-ing perfect
can I have been drilling? can you have been drilling? can he have been drilling? can we have been drilling? can you have been drilling? can they have been drilling?
Interro-negative form
Simple form
can't I drill? can't you drill? can't he drill? can't we drill? can't you drill? can't they drill?
V-ing form
can't I be drilling? can't you be drilling? can't he be drilling? can't we be drilling? can't you be drilling? can't they be drilling?
Perfect
can't I have drilled? can't you have drilled? can't he have drilled? can't we have drilled? can't you have drilled? can't they have drilled?
V-ing perfect
can't I have been drilling? can't you have been drilling? can't he have been drilling? can't we have been drilling? can't you have been drilling? can't they have been drilling?