can shack
Regular verb: shack - shacked- shacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can shack
you can shack
he can shack
we can shack
you can shack
they can shack 	I can be shacking
you can be shacking
he can be shacking
we can be shacking
you can be shacking
they can be shacking	I can have shacked
you can have shacked
he 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
he 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 	Perfect 	V-ing perfect 	
I can't shack
you can't shack
he 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
he can't be shacking
we can't be shacking
you can't be shacking
they can't be shacking	I can't have shacked
you can't have shacked
he 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
he 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 	Perfect 	V-ing perfect 	
can I shack?
can you shack?
can he shack?
can we shack?
can you shack?
can they shack? 	can I be shacking?
can you be shacking?
can he be shacking?
can we be shacking?
can you be shacking?
can they be shacking? 	can I have shacked?
can you have shacked?
can he 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 he 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 	Perfect 	V-ing perfect 	
can't I shack?
can't you shack?
can't he 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 he be shacking?
can't we be shacking?
can't you be shacking?
can't they be shacking? 	can't I have shacked?
can't you have shacked?
can't he 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 he have been shacking?
can't we have been shacking?
can't you have been shacking?
can't they have been shacking?