English verb conjugation
COULD HACK

Regular verb: hack - hacked - hacked

Affirmation

Simple form	V-ing form
I could hack you could hack she could hack we could hack you could hack they could hack	I could be hacking you could be hacking she could be hacking we could be hacking you could be hacking they could be hacking
Perfect	V-ing perfect
I could have hacked you could have hacked she could have hacked we could have hacked you could have hacked they could have hacked	I could have been hacking you could have been hacking she could have been hacking we could have been hacking you could have been hacking they could have been hacking

Negation

Simple form	V-ing form
I couldn't hack you couldn't hack she couldn't hack we couldn't hack you couldn't hack they couldn't hack	I couldn't be hacking you couldn't be hacking she couldn't be hacking we couldn't be hacking you couldn't be hacking they couldn't be hacking
Perfect	V-ing perfect
I couldn't have hacked you couldn't have hacked she couldn't have hacked we couldn't have hacked you couldn't have hacked they couldn't have hacked	I couldn't have been hacking you couldn't have been hacking she couldn't have been hacking we couldn't have been hacking you couldn't have been hacking they couldn't have been hacking

Interrogative form

Simple form	V-ing form
could I hack? could you hack? could she hack? could we hack? could you hack? could they hack?	could I be hacking? could you be hacking? could she be hacking? could we be hacking? could you be hacking? could they be hacking?
Perfect	V-ing perfect
could I have hacked? could you have hacked? could she have hacked? could we have hacked? could you have hacked? could they have hacked?	could I have been hacking? could you have been hacking? could she have been hacking? could we have been hacking? could you have been hacking? could they have been hacking?

Interro-negative form

Simple form	V-ing form
couldn't I hack? couldn't you hack? couldn't she hack? couldn't we hack? couldn't you hack? couldn't they hack?	couldn't I be hacking? couldn't you be hacking? couldn't she be hacking? couldn't we be hacking? couldn't you be hacking? couldn't they be hacking?
Perfect	V-ing perfect
couldn't I have hacked? couldn't you have hacked? couldn't she have hacked? couldn't we have hacked? couldn't you have hacked? couldn't they have hacked?	couldn't I have been hacking? couldn't you have been hacking? couldn't she have been hacking? couldn't we have been hacking? couldn't you have been hacking? couldn't they have been hacking?