English verb conjugation
COULD SHACK

Regular verb: shack - shacked - shacked

Affirmation

Simple form	V-ing form
I could shack you could shack she could shack we could shack you could shack they could shack	I could be shacking you could be shacking she could be shacking we could be shacking you could be shacking they could be shacking
Perfect	V-ing perfect
I could have shacked you could have shacked she could have shacked we could have shacked you could have shacked they could have shacked	I could have been shacking you could have been shacking she could have been shacking we could have been shacking you could have been shacking they could have been shacking

Negation

Simple form	V-ing form
I couldn't shack you couldn't shack she couldn't shack we couldn't shack you couldn't shack they couldn't shack	I couldn't be shacking you couldn't be shacking she couldn't be shacking we couldn't be shacking you couldn't be shacking they couldn't be shacking
Perfect	V-ing perfect
I couldn't have shacked you couldn't have shacked she couldn't have shacked we couldn't have shacked you couldn't have shacked they couldn't have shacked	I couldn't have been shacking you couldn't have been shacking she couldn't have been shacking we couldn't have been shacking you couldn't have been shacking they couldn't have been shacking

Interrogative form

Simple form	V-ing form
could I shack? could you shack? could she shack? could we shack? could you shack? could they shack?	could I be shacking? could you be shacking? could she be shacking? could we be shacking? could you be shacking? could they be shacking?
Perfect	V-ing perfect
could I have shacked? could you have shacked? could she have shacked? could we have shacked? could you have shacked? could they have shacked?	could I have been shacking? could you have been shacking? could she have been shacking? could we have been shacking? could you have been shacking? could they have been shacking?

Interro-negative form

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