English verb conjugation
COULD KEEP

Irregular verb: keep - kept - kept

Affirmation

Simple form	V-ing form
I could keep you could keep he could keep we could keep you could keep they could keep	I could be keeping you could be keeping he could be keeping we could be keeping you could be keeping they could be keeping
Perfect	V-ing perfect
I could have kept you could have kept he could have kept we could have kept you could have kept they could have kept	I could have been keeping you could have been keeping he could have been keeping we could have been keeping you could have been keeping they could have been keeping

Negation

Simple form	V-ing form
I could not keep you could not keep he could not keep we could not keep you could not keep they could not keep	I could not be keeping you could not be keeping he could not be keeping we could not be keeping you could not be keeping they could not be keeping
Perfect	V-ing perfect
I could not have kept you could not have kept he could not have kept we could not have kept you could not have kept they could not have kept	I could not have been keeping you could not have been keeping he could not have been keeping we could not have been keeping you could not have been keeping they could not have been keeping

Interrogative form

Simple form	V-ing form
could I keep? could you keep? could he keep? could we keep? could you keep? could they keep?	could I be keeping? could you be keeping? could he be keeping? could we be keeping? could you be keeping? could they be keeping?
Perfect	V-ing perfect
could I have kept? could you have kept? could he have kept? could we have kept? could you have kept? could they have kept?	could I have been keeping? could you have been keeping? could he have been keeping? could we have been keeping? could you have been keeping? could they have been keeping?

Interro-negative form

Simple form	V-ing form
could I not keep? could you not keep? could he not keep? could we not keep? could you not keep? could they not keep?	could I not be keeping? could you not be keeping? could he not be keeping? could we not be keeping? could you not be keeping? could they not be keeping?
Perfect	V-ing perfect
could I not have kept? could you not have kept? could he not have kept? could we not have kept? could you not have kept? could they not have kept?	could I not have been keeping? could you not have been keeping? could he not have been keeping? could we not have been keeping? could you not have been keeping? could they not have been keeping?