English verb conjugation
COULD EMPROVE STH

Regular verb: emprove sth - emprove sthed - emprove sthed

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I could emprove sth you could emprove sth he could emprove sth we could emprove sth you could emprove sth they could emprove sth	I could be emprove sthing you could be emprove sthing he could be emprove sthing we could be emprove sthing you could be emprove sthing they could be emprove sthing
Perfect	V-ing perfect
I could have emprove sthed you could have emprove sthed he could have emprove sthed we could have emprove sthed you could have emprove sthed they could have emprove sthed	I could have been emprove sthing you could have been emprove sthing he could have been emprove sthing we could have been emprove sthing you could have been emprove sthing they could have been emprove sthing

Negation

Simple form	V-ing form
I could not emprove sth you could not emprove sth he could not emprove sth we could not emprove sth you could not emprove sth they could not emprove sth	I could not be emprove sthing you could not be emprove sthing he could not be emprove sthing we could not be emprove sthing you could not be emprove sthing they could not be emprove sthing
Perfect	V-ing perfect
I could not have emprove sthed you could not have emprove sthed he could not have emprove sthed we could not have emprove sthed you could not have emprove sthed they could not have emprove sthed	I could not have been emprove sthing you could not have been emprove sthing he could not have been emprove sthing we could not have been emprove sthing you could not have been emprove sthing they could not have been emprove sthing

Interrogative form

Simple form	V-ing form
could I emprove sth? could you emprove sth? could he emprove sth? could we emprove sth? could you emprove sth? could they emprove sth?	could I be emprove sthing? could you be emprove sthing? could he be emprove sthing? could we be emprove sthing? could you be emprove sthing? could they be emprove sthing?
Perfect	V-ing perfect
could I have emprove sthed? could you have emprove sthed? could he have emprove sthed? could we have emprove sthed? could you have emprove sthed? could they have emprove sthed?	could I have been emprove sthing? could you have been emprove sthing? could he have been emprove sthing? could we have been emprove sthing? could you have been emprove sthing? could they have been emprove sthing?

Interro-negative form

Simple form	V-ing form
could I not emprove sth? could you not emprove sth? could he not emprove sth? could we not emprove sth? could you not emprove sth? could they not emprove sth?	could I not be emprove sthing? could you not be emprove sthing? could he not be emprove sthing? could we not be emprove sthing? could you not be emprove sthing? could they not be emprove sthing?
Perfect	V-ing perfect
could I not have emprove sthed? could you not have emprove sthed? could he not have emprove sthed? could we not have emprove sthed? could you not have emprove sthed? could they not have emprove sthed?	could I not have been emprove sthing? could you not have been emprove sthing? could he not have been emprove sthing? could we not have been emprove sthing? could you not have been emprove sthing? could they not have been emprove sthing?