English verb conjugation
COULD FUEL

Regular verb: fuel - fuelled - fuelled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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