Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could talk chat converse you could talk chat converse she could talk chat converse we could talk chat converse you could talk chat converse they could talk chat converse
V-ing form
I could be talk chat conversing you could be talk chat conversing she could be talk chat conversing we could be talk chat conversing you could be talk chat conversing they could be talk chat conversing
Perfect
I could have talk chat conversed you could have talk chat conversed she could have talk chat conversed we could have talk chat conversed you could have talk chat conversed they could have talk chat conversed
V-ing perfect
I could have been talk chat conversing you could have been talk chat conversing she could have been talk chat conversing we could have been talk chat conversing you could have been talk chat conversing they could have been talk chat conversing
Negation
Simple form
I couldn't talk chat converse you couldn't talk chat converse she couldn't talk chat converse we couldn't talk chat converse you couldn't talk chat converse they couldn't talk chat converse
V-ing form
I couldn't be talk chat conversing you couldn't be talk chat conversing she couldn't be talk chat conversing we couldn't be talk chat conversing you couldn't be talk chat conversing they couldn't be talk chat conversing
Perfect
I couldn't have talk chat conversed you couldn't have talk chat conversed she couldn't have talk chat conversed we couldn't have talk chat conversed you couldn't have talk chat conversed they couldn't have talk chat conversed
V-ing perfect
I couldn't have been talk chat conversing you couldn't have been talk chat conversing she couldn't have been talk chat conversing we couldn't have been talk chat conversing you couldn't have been talk chat conversing they couldn't have been talk chat conversing
Interrogative form
Simple form
could I talk chat converse? could you talk chat converse? could she talk chat converse? could we talk chat converse? could you talk chat converse? could they talk chat converse?
V-ing form
could I be talk chat conversing? could you be talk chat conversing? could she be talk chat conversing? could we be talk chat conversing? could you be talk chat conversing? could they be talk chat conversing?
Perfect
could I have talk chat conversed? could you have talk chat conversed? could she have talk chat conversed? could we have talk chat conversed? could you have talk chat conversed? could they have talk chat conversed?
V-ing perfect
could I have been talk chat conversing? could you have been talk chat conversing? could she have been talk chat conversing? could we have been talk chat conversing? could you have been talk chat conversing? could they have been talk chat conversing?
Interro-negative form
Simple form
couldn't I talk chat converse? couldn't you talk chat converse? couldn't she talk chat converse? couldn't we talk chat converse? couldn't you talk chat converse? couldn't they talk chat converse?
V-ing form
couldn't I be talk chat conversing? couldn't you be talk chat conversing? couldn't she be talk chat conversing? couldn't we be talk chat conversing? couldn't you be talk chat conversing? couldn't they be talk chat conversing?
Perfect
couldn't I have talk chat conversed? couldn't you have talk chat conversed? couldn't she have talk chat conversed? couldn't we have talk chat conversed? couldn't you have talk chat conversed? couldn't they have talk chat conversed?
V-ing perfect
couldn't I have been talk chat conversing? couldn't you have been talk chat conversing? couldn't she have been talk chat conversing? couldn't we have been talk chat conversing? couldn't you have been talk chat conversing? couldn't they have been talk chat conversing?