English verb conjugation
COULD SLACK

Regular verb: slack - slacked - slacked

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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