I could converse you could converse he could converse we could converse you could converse they could converse
V-ing form
I could be conversing you could be conversing he could be conversing we could be conversing you could be conversing they could be conversing
Perfect
I could have conversed you could have conversed he could have conversed we could have conversed you could have conversed they could have conversed
V-ing perfect
I could have been conversing you could have been conversing he could have been conversing we could have been conversing you could have been conversing they could have been conversing
Negation
Simple form
I could not converse you could not converse he could not converse we could not converse you could not converse they could not converse
V-ing form
I could not be conversing you could not be conversing he could not be conversing we could not be conversing you could not be conversing they could not be conversing
Perfect
I could not have conversed you could not have conversed he could not have conversed we could not have conversed you could not have conversed they could not have conversed
V-ing perfect
I could not have been conversing you could not have been conversing he could not have been conversing we could not have been conversing you could not have been conversing they could not have been conversing
Interrogative form
Simple form
could I converse? could you converse? could he converse? could we converse? could you converse? could they converse?
V-ing form
could I be conversing? could you be conversing? could he be conversing? could we be conversing? could you be conversing? could they be conversing?
Perfect
could I have conversed? could you have conversed? could he have conversed? could we have conversed? could you have conversed? could they have conversed?
V-ing perfect
could I have been conversing? could you have been conversing? could he have been conversing? could we have been conversing? could you have been conversing? could they have been conversing?
Interro-negative form
Simple form
could I not converse? could you not converse? could he not converse? could we not converse? could you not converse? could they not converse?
V-ing form
could I not be conversing? could you not be conversing? could he not be conversing? could we not be conversing? could you not be conversing? could they not be conversing?
Perfect
could I not have conversed? could you not have conversed? could he not have conversed? could we not have conversed? could you not have conversed? could they not have conversed?
V-ing perfect
could I not have been conversing? could you not have been conversing? could he not have been conversing? could we not have been conversing? could you not have been conversing? could they not have been conversing?