English verb conjugation
COULD CARD-INDEX

Regular verb: card-index - card-indexed - card-indexed

Affirmation

Simple form	V-ing form
I could card-index you could card-index he could card-index we could card-index you could card-index they could card-index	I could be card-indexing you could be card-indexing he could be card-indexing we could be card-indexing you could be card-indexing they could be card-indexing
Perfect	V-ing perfect
I could have card-indexed you could have card-indexed he could have card-indexed we could have card-indexed you could have card-indexed they could have card-indexed	I could have been card-indexing you could have been card-indexing he could have been card-indexing we could have been card-indexing you could have been card-indexing they could have been card-indexing

Negation

Simple form	V-ing form
I couldn't card-index you couldn't card-index he couldn't card-index we couldn't card-index you couldn't card-index they couldn't card-index	I couldn't be card-indexing you couldn't be card-indexing he couldn't be card-indexing we couldn't be card-indexing you couldn't be card-indexing they couldn't be card-indexing
Perfect	V-ing perfect
I couldn't have card-indexed you couldn't have card-indexed he couldn't have card-indexed we couldn't have card-indexed you couldn't have card-indexed they couldn't have card-indexed	I couldn't have been card-indexing you couldn't have been card-indexing he couldn't have been card-indexing we couldn't have been card-indexing you couldn't have been card-indexing they couldn't have been card-indexing

Interrogative form

Simple form	V-ing form
could I card-index? could you card-index? could he card-index? could we card-index? could you card-index? could they card-index?	could I be card-indexing? could you be card-indexing? could he be card-indexing? could we be card-indexing? could you be card-indexing? could they be card-indexing?
Perfect	V-ing perfect
could I have card-indexed? could you have card-indexed? could he have card-indexed? could we have card-indexed? could you have card-indexed? could they have card-indexed?	could I have been card-indexing? could you have been card-indexing? could he have been card-indexing? could we have been card-indexing? could you have been card-indexing? could they have been card-indexing?

Interro-negative form

Simple form	V-ing form
couldn't I card-index? couldn't you card-index? couldn't he card-index? couldn't we card-index? couldn't you card-index? couldn't they card-index?	couldn't I be card-indexing? couldn't you be card-indexing? couldn't he be card-indexing? couldn't we be card-indexing? couldn't you be card-indexing? couldn't they be card-indexing?
Perfect	V-ing perfect
couldn't I have card-indexed? couldn't you have card-indexed? couldn't he have card-indexed? couldn't we have card-indexed? couldn't you have card-indexed? couldn't they have card-indexed?	couldn't I have been card-indexing? couldn't you have been card-indexing? couldn't he have been card-indexing? couldn't we have been card-indexing? couldn't you have been card-indexing? couldn't they have been card-indexing?