Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could choice you could choice he could choice we could choice you could choice they could choice
V-ing form
I could be choicing you could be choicing he could be choicing we could be choicing you could be choicing they could be choicing
Perfect
I could have choiced you could have choiced he could have choiced we could have choiced you could have choiced they could have choiced
V-ing perfect
I could have been choicing you could have been choicing he could have been choicing we could have been choicing you could have been choicing they could have been choicing
Negation
Simple form
I couldn't choice you couldn't choice he couldn't choice we couldn't choice you couldn't choice they couldn't choice
V-ing form
I couldn't be choicing you couldn't be choicing he couldn't be choicing we couldn't be choicing you couldn't be choicing they couldn't be choicing
Perfect
I couldn't have choiced you couldn't have choiced he couldn't have choiced we couldn't have choiced you couldn't have choiced they couldn't have choiced
V-ing perfect
I couldn't have been choicing you couldn't have been choicing he couldn't have been choicing we couldn't have been choicing you couldn't have been choicing they couldn't have been choicing
Interrogative form
Simple form
could I choice? could you choice? could he choice? could we choice? could you choice? could they choice?
V-ing form
could I be choicing? could you be choicing? could he be choicing? could we be choicing? could you be choicing? could they be choicing?
Perfect
could I have choiced? could you have choiced? could he have choiced? could we have choiced? could you have choiced? could they have choiced?
V-ing perfect
could I have been choicing? could you have been choicing? could he have been choicing? could we have been choicing? could you have been choicing? could they have been choicing?
Interro-negative form
Simple form
couldn't I choice? couldn't you choice? couldn't he choice? couldn't we choice? couldn't you choice? couldn't they choice?
V-ing form
couldn't I be choicing? couldn't you be choicing? couldn't he be choicing? couldn't we be choicing? couldn't you be choicing? couldn't they be choicing?
Perfect
couldn't I have choiced? couldn't you have choiced? couldn't he have choiced? couldn't we have choiced? couldn't you have choiced? couldn't they have choiced?
V-ing perfect
couldn't I have been choicing? couldn't you have been choicing? couldn't he have been choicing? couldn't we have been choicing? couldn't you have been choicing? couldn't they have been choicing?