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 couldn't gulf you couldn't gulf he couldn't gulf we couldn't gulf you couldn't gulf they couldn't gulf	I couldn't be gulfing you couldn't be gulfing he couldn't be gulfing we couldn't be gulfing you couldn't be gulfing they couldn't be gulfing
Perfect	V-ing perfect
I couldn't have gulfed you couldn't have gulfed he couldn't have gulfed we couldn't have gulfed you couldn't have gulfed they couldn't have gulfed	I couldn't have been gulfing you couldn't have been gulfing he couldn't have been gulfing we couldn't have been gulfing you couldn't have been gulfing they couldn't 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
couldn't I gulf? couldn't you gulf? couldn't he gulf? couldn't we gulf? couldn't you gulf? couldn't they gulf?	couldn't I be gulfing? couldn't you be gulfing? couldn't he be gulfing? couldn't we be gulfing? couldn't you be gulfing? couldn't they be gulfing?
Perfect	V-ing perfect
couldn't I have gulfed? couldn't you have gulfed? couldn't he have gulfed? couldn't we have gulfed? couldn't you have gulfed? couldn't they have gulfed?	couldn't I have been gulfing? couldn't you have been gulfing? couldn't he have been gulfing? couldn't we have been gulfing? couldn't you have been gulfing? couldn't they have been gulfing?