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 he 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 he 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 he 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 he 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 couldn't half-open you couldn't half-open he couldn't half-open we couldn't half-open you couldn't half-open they couldn't half-open	I couldn't be half-opening you couldn't be half-opening he couldn't be half-opening we couldn't be half-opening you couldn't be half-opening they couldn't be half-opening
Perfect	V-ing perfect
I couldn't have half-opened you couldn't have half-opened he couldn't have half-opened we couldn't have half-opened you couldn't have half-opened they couldn't have half-opened	I couldn't have been half-opening you couldn't have been half-opening he couldn't have been half-opening we couldn't have been half-opening you couldn't have been half-opening they couldn't have been half-opening

Interrogative form

Simple form	V-ing form
could I half-open? could you half-open? could he 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 he 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 he 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 he 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
couldn't I half-open? couldn't you half-open? couldn't he half-open? couldn't we half-open? couldn't you half-open? couldn't they half-open?	couldn't I be half-opening? couldn't you be half-opening? couldn't he be half-opening? couldn't we be half-opening? couldn't you be half-opening? couldn't they be half-opening?
Perfect	V-ing perfect
couldn't I have half-opened? couldn't you have half-opened? couldn't he have half-opened? couldn't we have half-opened? couldn't you have half-opened? couldn't they have half-opened?	couldn't I have been half-opening? couldn't you have been half-opening? couldn't he have been half-opening? couldn't we have been half-opening? couldn't you have been half-opening? couldn't they have been half-opening?