English verb conjugation
CAN SHACK

Regular verb: shack - shacked - shacked

Affirmation

Simple form	V-ing form
I can shack you can shack she can shack we can shack you can shack they can shack	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
can I shack? can you shack? can she shack? can we shack? can you shack? can they shack?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?