can slack
Regular verb: slack - slacked- slacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can slack
you can slack
she can slack
we can slack
you can slack
they can slack 	I can be slacking
you can be slacking
she can be slacking
we can be slacking
you can be slacking
they can be slacking	I can have slacked
you can have slacked
she can have slacked
we can have slacked
you can have slacked
they can have slacked	I can have been slacking
you can have been slacking
she can have been slacking
we can have been slacking
you can have been slacking
they can have been slacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't slack
you can't slack
she can't slack
we can't slack
you can't slack
they can't slack 	I can't be slacking
you can't be slacking
she can't be slacking
we can't be slacking
you can't be slacking
they can't be slacking	I can't have slacked
you can't have slacked
she can't have slacked
we can't have slacked
you can't have slacked
they can't have slacked	I can't have been slacking
you can't have been slacking
she can't have been slacking
we can't have been slacking
you can't have been slacking
they can't have been slacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I slack?
can you slack?
can she slack?
can we slack?
can you slack?
can they slack? 	can I be slacking?
can you be slacking?
can she be slacking?
can we be slacking?
can you be slacking?
can they be slacking? 	can I have slacked?
can you have slacked?
can she have slacked?
can we have slacked?
can you have slacked?
can they have slacked? 	can I have been slacking?
can you have been slacking?
can she have been slacking?
can we have been slacking?
can you have been slacking?
can they have been slacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I slack?
can't you slack?
can't she slack?
can't we slack?
can't you slack?
can't they slack? 	can't I be slacking?
can't you be slacking?
can't she be slacking?
can't we be slacking?
can't you be slacking?
can't they be slacking? 	can't I have slacked?
can't you have slacked?
can't she have slacked?
can't we have slacked?
can't you have slacked?
can't they have slacked? 	can't I have been slacking?
can't you have been slacking?
can't she have been slacking?
can't we have been slacking?
can't you have been slacking?
can't they have been slacking?