English verb conjugation
COULD DRIVEL

Regular verb: drivel - drivelled - drivelled

Affirmation

Simple form	V-ing form
I could drivel you could drivel he could drivel we could drivel you could drivel they could drivel	I could be drivelling you could be drivelling he 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 he 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 he 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 he 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 he 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 he 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 he 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 he drivel? could we drivel? could you drivel? could they drivel?	could I be drivelling? could you be drivelling? could he 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 he 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 he 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 he 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 he 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 he 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 he have been drivelling? couldn't we have been drivelling? couldn't you have been drivelling? couldn't they have been drivelling?