English verb conjugation
COULD UPDATE

Regular verb: update - updated - updated

Affirmation

Simple form	V-ing form
I could update you could update he could update we could update you could update they could update	I could be updating you could be updating he could be updating we could be updating you could be updating they could be updating
Perfect	V-ing perfect
I could have updated you could have updated he could have updated we could have updated you could have updated they could have updated	I could have been updating you could have been updating he could have been updating we could have been updating you could have been updating they could have been updating

Negation

Simple form	V-ing form
I couldn't update you couldn't update he couldn't update we couldn't update you couldn't update they couldn't update	I couldn't be updating you couldn't be updating he couldn't be updating we couldn't be updating you couldn't be updating they couldn't be updating
Perfect	V-ing perfect
I couldn't have updated you couldn't have updated he couldn't have updated we couldn't have updated you couldn't have updated they couldn't have updated	I couldn't have been updating you couldn't have been updating he couldn't have been updating we couldn't have been updating you couldn't have been updating they couldn't have been updating

Interrogative form

Simple form	V-ing form
could I update? could you update? could he update? could we update? could you update? could they update?	could I be updating? could you be updating? could he be updating? could we be updating? could you be updating? could they be updating?
Perfect	V-ing perfect
could I have updated? could you have updated? could he have updated? could we have updated? could you have updated? could they have updated?	could I have been updating? could you have been updating? could he have been updating? could we have been updating? could you have been updating? could they have been updating?

Interro-negative form

Simple form	V-ing form
couldn't I update? couldn't you update? couldn't he update? couldn't we update? couldn't you update? couldn't they update?	couldn't I be updating? couldn't you be updating? couldn't he be updating? couldn't we be updating? couldn't you be updating? couldn't they be updating?
Perfect	V-ing perfect
couldn't I have updated? couldn't you have updated? couldn't he have updated? couldn't we have updated? couldn't you have updated? couldn't they have updated?	couldn't I have been updating? couldn't you have been updating? couldn't he have been updating? couldn't we have been updating? couldn't you have been updating? couldn't they have been updating?