English verb conjugation
MUST DRIVEL

Regular verb: drivel - drivelled - drivelled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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