English verb conjugation
COULD GULP

Regular verb: gulp - gulped - gulped

Affirmation

Simple form	V-ing form
I could gulp you could gulp she could gulp we could gulp you could gulp they could gulp	I could be gulping you could be gulping she could be gulping we could be gulping you could be gulping they could be gulping
Perfect	V-ing perfect
I could have gulped you could have gulped she could have gulped we could have gulped you could have gulped they could have gulped	I could have been gulping you could have been gulping she could have been gulping we could have been gulping you could have been gulping they could have been gulping

Negation

Simple form	V-ing form
I couldn't gulp you couldn't gulp she couldn't gulp we couldn't gulp you couldn't gulp they couldn't gulp	I couldn't be gulping you couldn't be gulping she couldn't be gulping we couldn't be gulping you couldn't be gulping they couldn't be gulping
Perfect	V-ing perfect
I couldn't have gulped you couldn't have gulped she couldn't have gulped we couldn't have gulped you couldn't have gulped they couldn't have gulped	I couldn't have been gulping you couldn't have been gulping she couldn't have been gulping we couldn't have been gulping you couldn't have been gulping they couldn't have been gulping

Interrogative form

Simple form	V-ing form
could I gulp? could you gulp? could she gulp? could we gulp? could you gulp? could they gulp?	could I be gulping? could you be gulping? could she be gulping? could we be gulping? could you be gulping? could they be gulping?
Perfect	V-ing perfect
could I have gulped? could you have gulped? could she have gulped? could we have gulped? could you have gulped? could they have gulped?	could I have been gulping? could you have been gulping? could she have been gulping? could we have been gulping? could you have been gulping? could they have been gulping?

Interro-negative form

Simple form	V-ing form
couldn't I gulp? couldn't you gulp? couldn't she gulp? couldn't we gulp? couldn't you gulp? couldn't they gulp?	couldn't I be gulping? couldn't you be gulping? couldn't she be gulping? couldn't we be gulping? couldn't you be gulping? couldn't they be gulping?
Perfect	V-ing perfect
couldn't I have gulped? couldn't you have gulped? couldn't she have gulped? couldn't we have gulped? couldn't you have gulped? couldn't they have gulped?	couldn't I have been gulping? couldn't you have been gulping? couldn't she have been gulping? couldn't we have been gulping? couldn't you have been gulping? couldn't they have been gulping?