I can drill you can drill she can drill we can drill you can drill they can drill
V-ing form
I can be drilling you can be drilling she can be drilling we can be drilling you can be drilling they can be drilling
Perfect
I can have drilled you can have drilled she 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 she 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 she 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 she 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 she 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 she 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 she drill? can we drill? can you drill? can they drill?
V-ing form
can I be drilling? can you be drilling? can she be drilling? can we be drilling? can you be drilling? can they be drilling?
Perfect
can I have drilled? can you have drilled? can she 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 she 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 she 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 she 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 she 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 she have been drilling? can't we have been drilling? can't you have been drilling? can't they have been drilling?