Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could fit fit you could fit fit he could fit fit we could fit fit you could fit fit they could fit fit
V-ing form
I could be fit fiting you could be fit fiting he could be fit fiting we could be fit fiting you could be fit fiting they could be fit fiting
Perfect
I could have fit fited you could have fit fited he could have fit fited we could have fit fited you could have fit fited they could have fit fited
V-ing perfect
I could have been fit fiting you could have been fit fiting he could have been fit fiting we could have been fit fiting you could have been fit fiting they could have been fit fiting
Negation
Simple form
I could not fit fit you could not fit fit he could not fit fit we could not fit fit you could not fit fit they could not fit fit
V-ing form
I could not be fit fiting you could not be fit fiting he could not be fit fiting we could not be fit fiting you could not be fit fiting they could not be fit fiting
Perfect
I could not have fit fited you could not have fit fited he could not have fit fited we could not have fit fited you could not have fit fited they could not have fit fited
V-ing perfect
I could not have been fit fiting you could not have been fit fiting he could not have been fit fiting we could not have been fit fiting you could not have been fit fiting they could not have been fit fiting
Interrogative form
Simple form
could I fit fit? could you fit fit? could he fit fit? could we fit fit? could you fit fit? could they fit fit?
V-ing form
could I be fit fiting? could you be fit fiting? could he be fit fiting? could we be fit fiting? could you be fit fiting? could they be fit fiting?
Perfect
could I have fit fited? could you have fit fited? could he have fit fited? could we have fit fited? could you have fit fited? could they have fit fited?
V-ing perfect
could I have been fit fiting? could you have been fit fiting? could he have been fit fiting? could we have been fit fiting? could you have been fit fiting? could they have been fit fiting?
Interro-negative form
Simple form
could I not fit fit? could you not fit fit? could he not fit fit? could we not fit fit? could you not fit fit? could they not fit fit?
V-ing form
could I not be fit fiting? could you not be fit fiting? could he not be fit fiting? could we not be fit fiting? could you not be fit fiting? could they not be fit fiting?
Perfect
could I not have fit fited? could you not have fit fited? could he not have fit fited? could we not have fit fited? could you not have fit fited? could they not have fit fited?
V-ing perfect
could I not have been fit fiting? could you not have been fit fiting? could he not have been fit fiting? could we not have been fit fiting? could you not have been fit fiting? could they not have been fit fiting?