English verb conjugation
COULD DRIVEL

Regular verb: drivel - drivelled - drivelled

Affirmation

Simple form	V-ing form
I could drivel you could drivel she could drivel we could drivel you could drivel they could drivel	I could be drivelling you could be drivelling she could be drivelling we could be drivelling you could be drivelling they could be drivelling
Perfect	V-ing perfect
I could have drivelled you could have drivelled she could have drivelled we could have drivelled you could have drivelled they could have drivelled	I could have been drivelling you could have been drivelling she could have been drivelling we could have been drivelling you could have been drivelling they could have been drivelling

Negation

Simple form	V-ing form
I couldn't drivel you couldn't drivel she couldn't drivel we couldn't drivel you couldn't drivel they couldn't drivel	I couldn't be drivelling you couldn't be drivelling she couldn't be drivelling we couldn't be drivelling you couldn't be drivelling they couldn't be drivelling
Perfect	V-ing perfect
I couldn't have drivelled you couldn't have drivelled she couldn't have drivelled we couldn't have drivelled you couldn't have drivelled they couldn't have drivelled	I couldn't have been drivelling you couldn't have been drivelling she couldn't have been drivelling we couldn't have been drivelling you couldn't have been drivelling they couldn't have been drivelling

Interrogative form

Simple form	V-ing form
could I drivel? could you drivel? could she drivel? could we drivel? could you drivel? could they drivel?	could I be drivelling? could you be drivelling? could she be drivelling? could we be drivelling? could you be drivelling? could they be drivelling?
Perfect	V-ing perfect
could I have drivelled? could you have drivelled? could she have drivelled? could we have drivelled? could you have drivelled? could they have drivelled?	could I have been drivelling? could you have been drivelling? could she have been drivelling? could we have been drivelling? could you have been drivelling? could they have been drivelling?

Interro-negative form

Simple form	V-ing form
couldn't I drivel? couldn't you drivel? couldn't she drivel? couldn't we drivel? couldn't you drivel? couldn't they drivel?	couldn't I be drivelling? couldn't you be drivelling? couldn't she be drivelling? couldn't we be drivelling? couldn't you be drivelling? couldn't they be drivelling?
Perfect	V-ing perfect
couldn't I have drivelled? couldn't you have drivelled? couldn't she have drivelled? couldn't we have drivelled? couldn't you have drivelled? couldn't they have drivelled?	couldn't I have been drivelling? couldn't you have been drivelling? couldn't she have been drivelling? couldn't we have been drivelling? couldn't you have been drivelling? couldn't they have been drivelling?