English verb conjugation
COULD UNKNOT

Regular verb: unknot - unknotted - unknotted

Affirmation

Simple form	V-ing form
I could unknot you could unknot he could unknot we could unknot you could unknot they could unknot	I could be unknotting you could be unknotting he could be unknotting we could be unknotting you could be unknotting they could be unknotting
Perfect	V-ing perfect
I could have unknotted you could have unknotted he could have unknotted we could have unknotted you could have unknotted they could have unknotted	I could have been unknotting you could have been unknotting he could have been unknotting we could have been unknotting you could have been unknotting they could have been unknotting

Negation

Simple form	V-ing form
I could not unknot you could not unknot he could not unknot we could not unknot you could not unknot they could not unknot	I could not be unknotting you could not be unknotting he could not be unknotting we could not be unknotting you could not be unknotting they could not be unknotting
Perfect	V-ing perfect
I could not have unknotted you could not have unknotted he could not have unknotted we could not have unknotted you could not have unknotted they could not have unknotted	I could not have been unknotting you could not have been unknotting he could not have been unknotting we could not have been unknotting you could not have been unknotting they could not have been unknotting

Interrogative form

Simple form	V-ing form
could I unknot? could you unknot? could he unknot? could we unknot? could you unknot? could they unknot?	could I be unknotting? could you be unknotting? could he be unknotting? could we be unknotting? could you be unknotting? could they be unknotting?
Perfect	V-ing perfect
could I have unknotted? could you have unknotted? could he have unknotted? could we have unknotted? could you have unknotted? could they have unknotted?	could I have been unknotting? could you have been unknotting? could he have been unknotting? could we have been unknotting? could you have been unknotting? could they have been unknotting?

Interro-negative form

Simple form	V-ing form
could I not unknot? could you not unknot? could he not unknot? could we not unknot? could you not unknot? could they not unknot?	could I not be unknotting? could you not be unknotting? could he not be unknotting? could we not be unknotting? could you not be unknotting? could they not be unknotting?
Perfect	V-ing perfect
could I not have unknotted? could you not have unknotted? could he not have unknotted? could we not have unknotted? could you not have unknotted? could they not have unknotted?	could I not have been unknotting? could you not have been unknotting? could he not have been unknotting? could we not have been unknotting? could you not have been unknotting? could they not have been unknotting?