English verb conjugation
COULD OVERSTUFF

Regular verb: overstuff - overstuffed - overstuffed

Affirmation

Simple form	V-ing form
I could overstuff you could overstuff he could overstuff we could overstuff you could overstuff they could overstuff	I could be overstuffing you could be overstuffing he could be overstuffing we could be overstuffing you could be overstuffing they could be overstuffing
Perfect	V-ing perfect
I could have overstuffed you could have overstuffed he could have overstuffed we could have overstuffed you could have overstuffed they could have overstuffed	I could have been overstuffing you could have been overstuffing he could have been overstuffing we could have been overstuffing you could have been overstuffing they could have been overstuffing

Negation

Simple form	V-ing form
I could not overstuff you could not overstuff he could not overstuff we could not overstuff you could not overstuff they could not overstuff	I could not be overstuffing you could not be overstuffing he could not be overstuffing we could not be overstuffing you could not be overstuffing they could not be overstuffing
Perfect	V-ing perfect
I could not have overstuffed you could not have overstuffed he could not have overstuffed we could not have overstuffed you could not have overstuffed they could not have overstuffed	I could not have been overstuffing you could not have been overstuffing he could not have been overstuffing we could not have been overstuffing you could not have been overstuffing they could not have been overstuffing

Interrogative form

Simple form	V-ing form
could I overstuff? could you overstuff? could he overstuff? could we overstuff? could you overstuff? could they overstuff?	could I be overstuffing? could you be overstuffing? could he be overstuffing? could we be overstuffing? could you be overstuffing? could they be overstuffing?
Perfect	V-ing perfect
could I have overstuffed? could you have overstuffed? could he have overstuffed? could we have overstuffed? could you have overstuffed? could they have overstuffed?	could I have been overstuffing? could you have been overstuffing? could he have been overstuffing? could we have been overstuffing? could you have been overstuffing? could they have been overstuffing?

Interro-negative form

Simple form	V-ing form
could I not overstuff? could you not overstuff? could he not overstuff? could we not overstuff? could you not overstuff? could they not overstuff?	could I not be overstuffing? could you not be overstuffing? could he not be overstuffing? could we not be overstuffing? could you not be overstuffing? could they not be overstuffing?
Perfect	V-ing perfect
could I not have overstuffed? could you not have overstuffed? could he not have overstuffed? could we not have overstuffed? could you not have overstuffed? could they not have overstuffed?	could I not have been overstuffing? could you not have been overstuffing? could he not have been overstuffing? could we not have been overstuffing? could you not have been overstuffing? could they not have been overstuffing?