I could catalogue you could catalogue he could catalogue we could catalogue you could catalogue they could catalogue
V-ing form
I could be cataloguing you could be cataloguing he could be cataloguing we could be cataloguing you could be cataloguing they could be cataloguing
Perfect
I could have catalogued you could have catalogued he could have catalogued we could have catalogued you could have catalogued they could have catalogued
V-ing perfect
I could have been cataloguing you could have been cataloguing he could have been cataloguing we could have been cataloguing you could have been cataloguing they could have been cataloguing
Negation
Simple form
I could not catalogue you could not catalogue he could not catalogue we could not catalogue you could not catalogue they could not catalogue
V-ing form
I could not be cataloguing you could not be cataloguing he could not be cataloguing we could not be cataloguing you could not be cataloguing they could not be cataloguing
Perfect
I could not have catalogued you could not have catalogued he could not have catalogued we could not have catalogued you could not have catalogued they could not have catalogued
V-ing perfect
I could not have been cataloguing you could not have been cataloguing he could not have been cataloguing we could not have been cataloguing you could not have been cataloguing they could not have been cataloguing
Interrogative form
Simple form
could I catalogue? could you catalogue? could he catalogue? could we catalogue? could you catalogue? could they catalogue?
V-ing form
could I be cataloguing? could you be cataloguing? could he be cataloguing? could we be cataloguing? could you be cataloguing? could they be cataloguing?
Perfect
could I have catalogued? could you have catalogued? could he have catalogued? could we have catalogued? could you have catalogued? could they have catalogued?
V-ing perfect
could I have been cataloguing? could you have been cataloguing? could he have been cataloguing? could we have been cataloguing? could you have been cataloguing? could they have been cataloguing?
Interro-negative form
Simple form
could I not catalogue? could you not catalogue? could he not catalogue? could we not catalogue? could you not catalogue? could they not catalogue?
V-ing form
could I not be cataloguing? could you not be cataloguing? could he not be cataloguing? could we not be cataloguing? could you not be cataloguing? could they not be cataloguing?
Perfect
could I not have catalogued? could you not have catalogued? could he not have catalogued? could we not have catalogued? could you not have catalogued? could they not have catalogued?
V-ing perfect
could I not have been cataloguing? could you not have been cataloguing? could he not have been cataloguing? could we not have been cataloguing? could you not have been cataloguing? could they not have been cataloguing?