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