English verb conjugation
COULD WRACK

Regular verb: wrack - wracked - wracked

Affirmation

Simple form	V-ing form
I could wrack you could wrack he could wrack we could wrack you could wrack they could wrack	I could be wracking you could be wracking he could be wracking we could be wracking you could be wracking they could be wracking
Perfect	V-ing perfect
I could have wracked you could have wracked he could have wracked we could have wracked you could have wracked they could have wracked	I could have been wracking you could have been wracking he could have been wracking we could have been wracking you could have been wracking they could have been wracking

Negation

Simple form	V-ing form
I couldn't wrack you couldn't wrack he couldn't wrack we couldn't wrack you couldn't wrack they couldn't wrack	I couldn't be wracking you couldn't be wracking he couldn't be wracking we couldn't be wracking you couldn't be wracking they couldn't be wracking
Perfect	V-ing perfect
I couldn't have wracked you couldn't have wracked he couldn't have wracked we couldn't have wracked you couldn't have wracked they couldn't have wracked	I couldn't have been wracking you couldn't have been wracking he couldn't have been wracking we couldn't have been wracking you couldn't have been wracking they couldn't have been wracking

Interrogative form

Simple form	V-ing form
could I wrack? could you wrack? could he wrack? could we wrack? could you wrack? could they wrack?	could I be wracking? could you be wracking? could he be wracking? could we be wracking? could you be wracking? could they be wracking?
Perfect	V-ing perfect
could I have wracked? could you have wracked? could he have wracked? could we have wracked? could you have wracked? could they have wracked?	could I have been wracking? could you have been wracking? could he have been wracking? could we have been wracking? could you have been wracking? could they have been wracking?

Interro-negative form

Simple form	V-ing form
couldn't I wrack? couldn't you wrack? couldn't he wrack? couldn't we wrack? couldn't you wrack? couldn't they wrack?	couldn't I be wracking? couldn't you be wracking? couldn't he be wracking? couldn't we be wracking? couldn't you be wracking? couldn't they be wracking?
Perfect	V-ing perfect
couldn't I have wracked? couldn't you have wracked? couldn't he have wracked? couldn't we have wracked? couldn't you have wracked? couldn't they have wracked?	couldn't I have been wracking? couldn't you have been wracking? couldn't he have been wracking? couldn't we have been wracking? couldn't you have been wracking? couldn't they have been wracking?