English verb conjugation
MUST FUEL

Regular verb: fuel - fuelled - fuelled

Affirmation

Simple form	V-ing form
I must fuel you must fuel he must fuel we must fuel you must fuel they must fuel	I must be fuelling you must be fuelling he must be fuelling we must be fuelling you must be fuelling they must be fuelling
Perfect	V-ing perfect
I must have fuelled you must have fuelled he must have fuelled we must have fuelled you must have fuelled they must have fuelled	I must have been fuelling you must have been fuelling he must have been fuelling we must have been fuelling you must have been fuelling they must have been fuelling

Negation

Simple form	V-ing form
I mustn't fuel you mustn't fuel he mustn't fuel we mustn't fuel you mustn't fuel they mustn't fuel	I mustn't be fuelling you mustn't be fuelling he mustn't be fuelling we mustn't be fuelling you mustn't be fuelling they mustn't be fuelling
Perfect	V-ing perfect
I mustn't have fuelled you mustn't have fuelled he mustn't have fuelled we mustn't have fuelled you mustn't have fuelled they mustn't have fuelled	I mustn't have been fuelling you mustn't have been fuelling he mustn't have been fuelling we mustn't have been fuelling you mustn't have been fuelling they mustn't have been fuelling

Interrogative form

Simple form	V-ing form
must I fuel? must you fuel? must he fuel? must we fuel? must you fuel? must they fuel?	must I be fuelling? must you be fuelling? must he be fuelling? must we be fuelling? must you be fuelling? must they be fuelling?
Perfect	V-ing perfect
must I have fuelled? must you have fuelled? must he have fuelled? must we have fuelled? must you have fuelled? must they have fuelled?	must I have been fuelling? must you have been fuelling? must he have been fuelling? must we have been fuelling? must you have been fuelling? must they have been fuelling?

Interro-negative form

Simple form	V-ing form
mustn't I fuel? mustn't you fuel? mustn't he fuel? mustn't we fuel? mustn't you fuel? mustn't they fuel?	mustn't I be fuelling? mustn't you be fuelling? mustn't he be fuelling? mustn't we be fuelling? mustn't you be fuelling? mustn't they be fuelling?
Perfect	V-ing perfect
mustn't I have fuelled? mustn't you have fuelled? mustn't he have fuelled? mustn't we have fuelled? mustn't you have fuelled? mustn't they have fuelled?	mustn't I have been fuelling? mustn't you have been fuelling? mustn't he have been fuelling? mustn't we have been fuelling? mustn't you have been fuelling? mustn't they have been fuelling?