English verb conjugation
COULD HALF-OPEN

Regular verb: half-open - half-opened - half-opened

Affirmation

Simple form	V-ing form
I could half-open you could half-open she could half-open we could half-open you could half-open they could half-open	I could be half-opening you could be half-opening she could be half-opening we could be half-opening you could be half-opening they could be half-opening
Perfect	V-ing perfect
I could have half-opened you could have half-opened she could have half-opened we could have half-opened you could have half-opened they could have half-opened	I could have been half-opening you could have been half-opening she could have been half-opening we could have been half-opening you could have been half-opening they could have been half-opening

Negation

Simple form	V-ing form
I could not half-open you could not half-open she could not half-open we could not half-open you could not half-open they could not half-open	I could not be half-opening you could not be half-opening she could not be half-opening we could not be half-opening you could not be half-opening they could not be half-opening
Perfect	V-ing perfect
I could not have half-opened you could not have half-opened she could not have half-opened we could not have half-opened you could not have half-opened they could not have half-opened	I could not have been half-opening you could not have been half-opening she could not have been half-opening we could not have been half-opening you could not have been half-opening they could not have been half-opening

Interrogative form

Simple form	V-ing form
could I half-open? could you half-open? could she half-open? could we half-open? could you half-open? could they half-open?	could I be half-opening? could you be half-opening? could she be half-opening? could we be half-opening? could you be half-opening? could they be half-opening?
Perfect	V-ing perfect
could I have half-opened? could you have half-opened? could she have half-opened? could we have half-opened? could you have half-opened? could they have half-opened?	could I have been half-opening? could you have been half-opening? could she have been half-opening? could we have been half-opening? could you have been half-opening? could they have been half-opening?

Interro-negative form

Simple form	V-ing form
could I not half-open? could you not half-open? could she not half-open? could we not half-open? could you not half-open? could they not half-open?	could I not be half-opening? could you not be half-opening? could she not be half-opening? could we not be half-opening? could you not be half-opening? could they not be half-opening?
Perfect	V-ing perfect
could I not have half-opened? could you not have half-opened? could she not have half-opened? could we not have half-opened? could you not have half-opened? could they not have half-opened?	could I not have been half-opening? could you not have been half-opening? could she not have been half-opening? could we not have been half-opening? could you not have been half-opening? could they not have been half-opening?