English verb conjugation
MUST REFUEL

Regular verb: refuel - refuelled - refuelled

Affirmation

Simple form	V-ing form
I must refuel you must refuel he must refuel we must refuel you must refuel they must refuel	I must be refuelling you must be refuelling he must be refuelling we must be refuelling you must be refuelling they must be refuelling
Perfect	V-ing perfect
I must have refuelled you must have refuelled he must have refuelled we must have refuelled you must have refuelled they must have refuelled	I must have been refuelling you must have been refuelling he must have been refuelling we must have been refuelling you must have been refuelling they must have been refuelling

Negation

Simple form	V-ing form
I must not refuel you must not refuel he must not refuel we must not refuel you must not refuel they must not refuel	I must not be refuelling you must not be refuelling he must not be refuelling we must not be refuelling you must not be refuelling they must not be refuelling
Perfect	V-ing perfect
I must not have refuelled you must not have refuelled he must not have refuelled we must not have refuelled you must not have refuelled they must not have refuelled	I must not have been refuelling you must not have been refuelling he must not have been refuelling we must not have been refuelling you must not have been refuelling they must not have been refuelling

Interrogative form

Simple form	V-ing form
must I refuel? must you refuel? must he refuel? must we refuel? must you refuel? must they refuel?	must I be refuelling? must you be refuelling? must he be refuelling? must we be refuelling? must you be refuelling? must they be refuelling?
Perfect	V-ing perfect
must I have refuelled? must you have refuelled? must he have refuelled? must we have refuelled? must you have refuelled? must they have refuelled?	must I have been refuelling? must you have been refuelling? must he have been refuelling? must we have been refuelling? must you have been refuelling? must they have been refuelling?

Interro-negative form

Simple form	V-ing form
must I not refuel? must you not refuel? must he not refuel? must we not refuel? must you not refuel? must they not refuel?	must I not be refuelling? must you not be refuelling? must he not be refuelling? must we not be refuelling? must you not be refuelling? must they not be refuelling?
Perfect	V-ing perfect
must I not have refuelled? must you not have refuelled? must he not have refuelled? must we not have refuelled? must you not have refuelled? must they not have refuelled?	must I not have been refuelling? must you not have been refuelling? must he not have been refuelling? must we not have been refuelling? must you not have been refuelling? must they not have been refuelling?