I can shack you can shack she can shack we can shack you can shack they can shack
V-ing form
I can be shacking you can be shacking she can be shacking we can be shacking you can be shacking they can be shacking
Perfect
I can have shacked you can have shacked she can have shacked we can have shacked you can have shacked they can have shacked
V-ing perfect
I can have been shacking you can have been shacking she can have been shacking we can have been shacking you can have been shacking they can have been shacking
Negation
Simple form
I can't shack you can't shack she can't shack we can't shack you can't shack they can't shack
V-ing form
I can't be shacking you can't be shacking she can't be shacking we can't be shacking you can't be shacking they can't be shacking
Perfect
I can't have shacked you can't have shacked she can't have shacked we can't have shacked you can't have shacked they can't have shacked
V-ing perfect
I can't have been shacking you can't have been shacking she can't have been shacking we can't have been shacking you can't have been shacking they can't have been shacking
Interrogative form
Simple form
can I shack? can you shack? can she shack? can we shack? can you shack? can they shack?
V-ing form
can I be shacking? can you be shacking? can she be shacking? can we be shacking? can you be shacking? can they be shacking?
Perfect
can I have shacked? can you have shacked? can she have shacked? can we have shacked? can you have shacked? can they have shacked?
V-ing perfect
can I have been shacking? can you have been shacking? can she have been shacking? can we have been shacking? can you have been shacking? can they have been shacking?
Interro-negative form
Simple form
can't I shack? can't you shack? can't she shack? can't we shack? can't you shack? can't they shack?
V-ing form
can't I be shacking? can't you be shacking? can't she be shacking? can't we be shacking? can't you be shacking? can't they be shacking?
Perfect
can't I have shacked? can't you have shacked? can't she have shacked? can't we have shacked? can't you have shacked? can't they have shacked?
V-ing perfect
can't I have been shacking? can't you have been shacking? can't she have been shacking? can't we have been shacking? can't you have been shacking? can't they have been shacking?