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 couldn't catalog you couldn't catalog he couldn't catalog we couldn't catalog you couldn't catalog they couldn't catalog	I couldn't be cataloging you couldn't be cataloging he couldn't be cataloging we couldn't be cataloging you couldn't be cataloging they couldn't be cataloging
Perfect	V-ing perfect
I couldn't have cataloged you couldn't have cataloged he couldn't have cataloged we couldn't have cataloged you couldn't have cataloged they couldn't have cataloged	I couldn't have been cataloging you couldn't have been cataloging he couldn't have been cataloging we couldn't have been cataloging you couldn't have been cataloging they couldn't 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
couldn't I catalog? couldn't you catalog? couldn't he catalog? couldn't we catalog? couldn't you catalog? couldn't they catalog?	couldn't I be cataloging? couldn't you be cataloging? couldn't he be cataloging? couldn't we be cataloging? couldn't you be cataloging? couldn't they be cataloging?
Perfect	V-ing perfect
couldn't I have cataloged? couldn't you have cataloged? couldn't he have cataloged? couldn't we have cataloged? couldn't you have cataloged? couldn't they have cataloged?	couldn't I have been cataloging? couldn't you have been cataloging? couldn't he have been cataloging? couldn't we have been cataloging? couldn't you have been cataloging? couldn't they have been cataloging?