Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could emagine sth you could emagine sth she could emagine sth we could emagine sth you could emagine sth they could emagine sth
V-ing form
I could be emagine sthing you could be emagine sthing she could be emagine sthing we could be emagine sthing you could be emagine sthing they could be emagine sthing
Perfect
I could have emagine sthed you could have emagine sthed she could have emagine sthed we could have emagine sthed you could have emagine sthed they could have emagine sthed
V-ing perfect
I could have been emagine sthing you could have been emagine sthing she could have been emagine sthing we could have been emagine sthing you could have been emagine sthing they could have been emagine sthing
Negation
Simple form
I could not emagine sth you could not emagine sth she could not emagine sth we could not emagine sth you could not emagine sth they could not emagine sth
V-ing form
I could not be emagine sthing you could not be emagine sthing she could not be emagine sthing we could not be emagine sthing you could not be emagine sthing they could not be emagine sthing
Perfect
I could not have emagine sthed you could not have emagine sthed she could not have emagine sthed we could not have emagine sthed you could not have emagine sthed they could not have emagine sthed
V-ing perfect
I could not have been emagine sthing you could not have been emagine sthing she could not have been emagine sthing we could not have been emagine sthing you could not have been emagine sthing they could not have been emagine sthing
Interrogative form
Simple form
could I emagine sth? could you emagine sth? could she emagine sth? could we emagine sth? could you emagine sth? could they emagine sth?
V-ing form
could I be emagine sthing? could you be emagine sthing? could she be emagine sthing? could we be emagine sthing? could you be emagine sthing? could they be emagine sthing?
Perfect
could I have emagine sthed? could you have emagine sthed? could she have emagine sthed? could we have emagine sthed? could you have emagine sthed? could they have emagine sthed?
V-ing perfect
could I have been emagine sthing? could you have been emagine sthing? could she have been emagine sthing? could we have been emagine sthing? could you have been emagine sthing? could they have been emagine sthing?
Interro-negative form
Simple form
could I not emagine sth? could you not emagine sth? could she not emagine sth? could we not emagine sth? could you not emagine sth? could they not emagine sth?
V-ing form
could I not be emagine sthing? could you not be emagine sthing? could she not be emagine sthing? could we not be emagine sthing? could you not be emagine sthing? could they not be emagine sthing?
Perfect
could I not have emagine sthed? could you not have emagine sthed? could she not have emagine sthed? could we not have emagine sthed? could you not have emagine sthed? could they not have emagine sthed?
V-ing perfect
could I not have been emagine sthing? could you not have been emagine sthing? could she not have been emagine sthing? could we not have been emagine sthing? could you not have been emagine sthing? could they not have been emagine sthing?