English verb conjugation
COULD CATALOG

Regular verb: catalog - cataloged - cataloged

Affirmation

Simple form	V-ing form
I could catalog you could catalog he could catalog we could catalog you could catalog they could catalog	I could be cataloging you could be cataloging he could be cataloging we could be cataloging you could be cataloging they could be cataloging
Perfect	V-ing perfect
I could have cataloged you could have cataloged he could have cataloged we could have cataloged you could have cataloged they could have cataloged	I could have been cataloging you could have been cataloging he could have been cataloging we could have been cataloging you could have been cataloging they could have been cataloging

Negation

Simple form	V-ing form
I could not catalog you could not catalog he could not catalog we could not catalog you could not catalog they could not catalog	I could not be cataloging you could not be cataloging he could not be cataloging we could not be cataloging you could not be cataloging they could not be cataloging
Perfect	V-ing perfect
I could not have cataloged you could not have cataloged he could not have cataloged we could not have cataloged you could not have cataloged they could not have cataloged	I could not have been cataloging you could not have been cataloging he could not have been cataloging we could not have been cataloging you could not have been cataloging they could not have been cataloging

Interrogative form

Simple form	V-ing form
could I catalog? could you catalog? could he catalog? could we catalog? could you catalog? could they catalog?	could I be cataloging? could you be cataloging? could he be cataloging? could we be cataloging? could you be cataloging? could they be cataloging?
Perfect	V-ing perfect
could I have cataloged? could you have cataloged? could he have cataloged? could we have cataloged? could you have cataloged? could they have cataloged?	could I have been cataloging? could you have been cataloging? could he have been cataloging? could we have been cataloging? could you have been cataloging? could they have been cataloging?

Interro-negative form

Simple form	V-ing form
could I not catalog? could you not catalog? could he not catalog? could we not catalog? could you not catalog? could they not catalog?	could I not be cataloging? could you not be cataloging? could he not be cataloging? could we not be cataloging? could you not be cataloging? could they not be cataloging?
Perfect	V-ing perfect
could I not have cataloged? could you not have cataloged? could he not have cataloged? could we not have cataloged? could you not have cataloged? could they not have cataloged?	could I not have been cataloging? could you not have been cataloging? could he not have been cataloging? could we not have been cataloging? could you not have been cataloging? could they not have been cataloging?