English verb conjugation
COULD NICK

Regular verb: nick - nicked - nicked

Affirmation

Simple form	V-ing form
I could nick you could nick he could nick we could nick you could nick they could nick	I could be nicking you could be nicking he could be nicking we could be nicking you could be nicking they could be nicking
Perfect	V-ing perfect
I could have nicked you could have nicked he could have nicked we could have nicked you could have nicked they could have nicked	I could have been nicking you could have been nicking he could have been nicking we could have been nicking you could have been nicking they could have been nicking

Negation

Simple form	V-ing form
I couldn't nick you couldn't nick he couldn't nick we couldn't nick you couldn't nick they couldn't nick	I couldn't be nicking you couldn't be nicking he couldn't be nicking we couldn't be nicking you couldn't be nicking they couldn't be nicking
Perfect	V-ing perfect
I couldn't have nicked you couldn't have nicked he couldn't have nicked we couldn't have nicked you couldn't have nicked they couldn't have nicked	I couldn't have been nicking you couldn't have been nicking he couldn't have been nicking we couldn't have been nicking you couldn't have been nicking they couldn't have been nicking

Interrogative form

Simple form	V-ing form
could I nick? could you nick? could he nick? could we nick? could you nick? could they nick?	could I be nicking? could you be nicking? could he be nicking? could we be nicking? could you be nicking? could they be nicking?
Perfect	V-ing perfect
could I have nicked? could you have nicked? could he have nicked? could we have nicked? could you have nicked? could they have nicked?	could I have been nicking? could you have been nicking? could he have been nicking? could we have been nicking? could you have been nicking? could they have been nicking?

Interro-negative form

Simple form	V-ing form
couldn't I nick? couldn't you nick? couldn't he nick? couldn't we nick? couldn't you nick? couldn't they nick?	couldn't I be nicking? couldn't you be nicking? couldn't he be nicking? couldn't we be nicking? couldn't you be nicking? couldn't they be nicking?
Perfect	V-ing perfect
couldn't I have nicked? couldn't you have nicked? couldn't he have nicked? couldn't we have nicked? couldn't you have nicked? couldn't they have nicked?	couldn't I have been nicking? couldn't you have been nicking? couldn't he have been nicking? couldn't we have been nicking? couldn't you have been nicking? couldn't they have been nicking?