English verb conjugation
COULD GULF

Regular verb: gulf - gulfed - gulfed

Affirmation

Simple form	V-ing form
I could gulf you could gulf he could gulf we could gulf you could gulf they could gulf	I could be gulfing you could be gulfing he could be gulfing we could be gulfing you could be gulfing they could be gulfing
Perfect	V-ing perfect
I could have gulfed you could have gulfed he could have gulfed we could have gulfed you could have gulfed they could have gulfed	I could have been gulfing you could have been gulfing he could have been gulfing we could have been gulfing you could have been gulfing they could have been gulfing

Negation

Simple form	V-ing form
I could not gulf you could not gulf he could not gulf we could not gulf you could not gulf they could not gulf	I could not be gulfing you could not be gulfing he could not be gulfing we could not be gulfing you could not be gulfing they could not be gulfing
Perfect	V-ing perfect
I could not have gulfed you could not have gulfed he could not have gulfed we could not have gulfed you could not have gulfed they could not have gulfed	I could not have been gulfing you could not have been gulfing he could not have been gulfing we could not have been gulfing you could not have been gulfing they could not have been gulfing

Interrogative form

Simple form	V-ing form
could I gulf? could you gulf? could he gulf? could we gulf? could you gulf? could they gulf?	could I be gulfing? could you be gulfing? could he be gulfing? could we be gulfing? could you be gulfing? could they be gulfing?
Perfect	V-ing perfect
could I have gulfed? could you have gulfed? could he have gulfed? could we have gulfed? could you have gulfed? could they have gulfed?	could I have been gulfing? could you have been gulfing? could he have been gulfing? could we have been gulfing? could you have been gulfing? could they have been gulfing?

Interro-negative form

Simple form	V-ing form
could I not gulf? could you not gulf? could he not gulf? could we not gulf? could you not gulf? could they not gulf?	could I not be gulfing? could you not be gulfing? could he not be gulfing? could we not be gulfing? could you not be gulfing? could they not be gulfing?
Perfect	V-ing perfect
could I not have gulfed? could you not have gulfed? could he not have gulfed? could we not have gulfed? could you not have gulfed? could they not have gulfed?	could I not have been gulfing? could you not have been gulfing? could he not have been gulfing? could we not have been gulfing? could you not have been gulfing? could they not have been gulfing?