English verb conjugation
COULD KNOT

Regular verb: knot - knotted - knotted

Affirmation

Simple form	V-ing form
I could knot you could knot he could knot we could knot you could knot they could knot	I could be knotting you could be knotting he could be knotting we could be knotting you could be knotting they could be knotting
Perfect	V-ing perfect
I could have knotted you could have knotted he could have knotted we could have knotted you could have knotted they could have knotted	I could have been knotting you could have been knotting he could have been knotting we could have been knotting you could have been knotting they could have been knotting

Negation

Simple form	V-ing form
I couldn't knot you couldn't knot he couldn't knot we couldn't knot you couldn't knot they couldn't knot	I couldn't be knotting you couldn't be knotting he couldn't be knotting we couldn't be knotting you couldn't be knotting they couldn't be knotting
Perfect	V-ing perfect
I couldn't have knotted you couldn't have knotted he couldn't have knotted we couldn't have knotted you couldn't have knotted they couldn't have knotted	I couldn't have been knotting you couldn't have been knotting he couldn't have been knotting we couldn't have been knotting you couldn't have been knotting they couldn't have been knotting

Interrogative form

Simple form	V-ing form
could I knot? could you knot? could he knot? could we knot? could you knot? could they knot?	could I be knotting? could you be knotting? could he be knotting? could we be knotting? could you be knotting? could they be knotting?
Perfect	V-ing perfect
could I have knotted? could you have knotted? could he have knotted? could we have knotted? could you have knotted? could they have knotted?	could I have been knotting? could you have been knotting? could he have been knotting? could we have been knotting? could you have been knotting? could they have been knotting?

Interro-negative form

Simple form	V-ing form
couldn't I knot? couldn't you knot? couldn't he knot? couldn't we knot? couldn't you knot? couldn't they knot?	couldn't I be knotting? couldn't you be knotting? couldn't he be knotting? couldn't we be knotting? couldn't you be knotting? couldn't they be knotting?
Perfect	V-ing perfect
couldn't I have knotted? couldn't you have knotted? couldn't he have knotted? couldn't we have knotted? couldn't you have knotted? couldn't they have knotted?	couldn't I have been knotting? couldn't you have been knotting? couldn't he have been knotting? couldn't we have been knotting? couldn't you have been knotting? couldn't they have been knotting?