English verb conjugation
COULD SACK SACK

Regular verb: sack sack - sack sacked - sack sacked

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I could sack sack you could sack sack he could sack sack we could sack sack you could sack sack they could sack sack	I could be sack sacking you could be sack sacking he could be sack sacking we could be sack sacking you could be sack sacking they could be sack sacking
Perfect	V-ing perfect
I could have sack sacked you could have sack sacked he could have sack sacked we could have sack sacked you could have sack sacked they could have sack sacked	I could have been sack sacking you could have been sack sacking he could have been sack sacking we could have been sack sacking you could have been sack sacking they could have been sack sacking

Negation

Simple form	V-ing form
I could not sack sack you could not sack sack he could not sack sack we could not sack sack you could not sack sack they could not sack sack	I could not be sack sacking you could not be sack sacking he could not be sack sacking we could not be sack sacking you could not be sack sacking they could not be sack sacking
Perfect	V-ing perfect
I could not have sack sacked you could not have sack sacked he could not have sack sacked we could not have sack sacked you could not have sack sacked they could not have sack sacked	I could not have been sack sacking you could not have been sack sacking he could not have been sack sacking we could not have been sack sacking you could not have been sack sacking they could not have been sack sacking

Interrogative form

Simple form	V-ing form
could I sack sack? could you sack sack? could he sack sack? could we sack sack? could you sack sack? could they sack sack?	could I be sack sacking? could you be sack sacking? could he be sack sacking? could we be sack sacking? could you be sack sacking? could they be sack sacking?
Perfect	V-ing perfect
could I have sack sacked? could you have sack sacked? could he have sack sacked? could we have sack sacked? could you have sack sacked? could they have sack sacked?	could I have been sack sacking? could you have been sack sacking? could he have been sack sacking? could we have been sack sacking? could you have been sack sacking? could they have been sack sacking?

Interro-negative form

Simple form	V-ing form
could I not sack sack? could you not sack sack? could he not sack sack? could we not sack sack? could you not sack sack? could they not sack sack?	could I not be sack sacking? could you not be sack sacking? could he not be sack sacking? could we not be sack sacking? could you not be sack sacking? could they not be sack sacking?
Perfect	V-ing perfect
could I not have sack sacked? could you not have sack sacked? could he not have sack sacked? could we not have sack sacked? could you not have sack sacked? could they not have sack sacked?	could I not have been sack sacking? could you not have been sack sacking? could he not have been sack sacking? could we not have been sack sacking? could you not have been sack sacking? could they not have been sack sacking?