I could exenterate you could exenterate she could exenterate we could exenterate you could exenterate they could exenterate
V-ing form
I could be exenterating you could be exenterating she could be exenterating we could be exenterating you could be exenterating they could be exenterating
Perfect
I could have exenterated you could have exenterated she could have exenterated we could have exenterated you could have exenterated they could have exenterated
V-ing perfect
I could have been exenterating you could have been exenterating she could have been exenterating we could have been exenterating you could have been exenterating they could have been exenterating
Negation
Simple form
I could not exenterate you could not exenterate she could not exenterate we could not exenterate you could not exenterate they could not exenterate
V-ing form
I could not be exenterating you could not be exenterating she could not be exenterating we could not be exenterating you could not be exenterating they could not be exenterating
Perfect
I could not have exenterated you could not have exenterated she could not have exenterated we could not have exenterated you could not have exenterated they could not have exenterated
V-ing perfect
I could not have been exenterating you could not have been exenterating she could not have been exenterating we could not have been exenterating you could not have been exenterating they could not have been exenterating
Interrogative form
Simple form
could I exenterate? could you exenterate? could she exenterate? could we exenterate? could you exenterate? could they exenterate?
V-ing form
could I be exenterating? could you be exenterating? could she be exenterating? could we be exenterating? could you be exenterating? could they be exenterating?
Perfect
could I have exenterated? could you have exenterated? could she have exenterated? could we have exenterated? could you have exenterated? could they have exenterated?
V-ing perfect
could I have been exenterating? could you have been exenterating? could she have been exenterating? could we have been exenterating? could you have been exenterating? could they have been exenterating?
Interro-negative form
Simple form
could I not exenterate? could you not exenterate? could she not exenterate? could we not exenterate? could you not exenterate? could they not exenterate?
V-ing form
could I not be exenterating? could you not be exenterating? could she not be exenterating? could we not be exenterating? could you not be exenterating? could they not be exenterating?
Perfect
could I not have exenterated? could you not have exenterated? could she not have exenterated? could we not have exenterated? could you not have exenterated? could they not have exenterated?
V-ing perfect
could I not have been exenterating? could you not have been exenterating? could she not have been exenterating? could we not have been exenterating? could you not have been exenterating? could they not have been exenterating?