English verb conjugation
COULD SLICK

Regular verb: slick - slicked - slicked

Affirmation

Simple form	V-ing form
I could slick you could slick he could slick we could slick you could slick they could slick	I could be slicking you could be slicking he could be slicking we could be slicking you could be slicking they could be slicking
Perfect	V-ing perfect
I could have slicked you could have slicked he could have slicked we could have slicked you could have slicked they could have slicked	I could have been slicking you could have been slicking he could have been slicking we could have been slicking you could have been slicking they could have been slicking

Negation

Simple form	V-ing form
I could not slick you could not slick he could not slick we could not slick you could not slick they could not slick	I could not be slicking you could not be slicking he could not be slicking we could not be slicking you could not be slicking they could not be slicking
Perfect	V-ing perfect
I could not have slicked you could not have slicked he could not have slicked we could not have slicked you could not have slicked they could not have slicked	I could not have been slicking you could not have been slicking he could not have been slicking we could not have been slicking you could not have been slicking they could not have been slicking

Interrogative form

Simple form	V-ing form
could I slick? could you slick? could he slick? could we slick? could you slick? could they slick?	could I be slicking? could you be slicking? could he be slicking? could we be slicking? could you be slicking? could they be slicking?
Perfect	V-ing perfect
could I have slicked? could you have slicked? could he have slicked? could we have slicked? could you have slicked? could they have slicked?	could I have been slicking? could you have been slicking? could he have been slicking? could we have been slicking? could you have been slicking? could they have been slicking?

Interro-negative form

Simple form	V-ing form
could I not slick? could you not slick? could he not slick? could we not slick? could you not slick? could they not slick?	could I not be slicking? could you not be slicking? could he not be slicking? could we not be slicking? could you not be slicking? could they not be slicking?
Perfect	V-ing perfect
could I not have slicked? could you not have slicked? could he not have slicked? could we not have slicked? could you not have slicked? could they not have slicked?	could I not have been slicking? could you not have been slicking? could he not have been slicking? could we not have been slicking? could you not have been slicking? could they not have been slicking?