English verb conjugation
CAN SLACK

Regular verb: slack - slacked - slacked

Affirmation

Simple form	V-ing form
I can slack you can slack he can slack we can slack you can slack they can slack	I can be slacking you can be slacking he can be slacking we can be slacking you can be slacking they can be slacking
Perfect	V-ing perfect
I can have slacked you can have slacked he 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 he 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
I cannot slack you cannot slack he cannot slack we cannot slack you cannot slack they cannot slack	I cannot be slacking you cannot be slacking he cannot be slacking we cannot be slacking you cannot be slacking they cannot be slacking
Perfect	V-ing perfect
I cannot have slacked you cannot have slacked he cannot have slacked we cannot have slacked you cannot have slacked they cannot have slacked	I cannot have been slacking you cannot have been slacking he cannot have been slacking we cannot have been slacking you cannot have been slacking they cannot have been slacking

Interrogative form

Simple form	V-ing form
can I slack? can you slack? can he slack? can we slack? can you slack? can they slack?	can I be slacking? can you be slacking? can he be slacking? can we be slacking? can you be slacking? can they be slacking?
Perfect	V-ing perfect
can I have slacked? can you have slacked? can he 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 he 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
can I not slack? can you not slack? can he not slack? can we not slack? can you not slack? can they not slack?	can I not be slacking? can you not be slacking? can he not be slacking? can we not be slacking? can you not be slacking? can they not be slacking?
Perfect	V-ing perfect
can I not have slacked? can you not have slacked? can he not have slacked? can we not have slacked? can you not have slacked? can they not have slacked?	can I not have been slacking? can you not have been slacking? can he not have been slacking? can we not have been slacking? can you not have been slacking? can they not have been slacking?