English verb conjugation COULD REFUEL

Regular verb: refuel - refuelled - refuelled

Affirmation

Simple form

I could refuel
you could refuel
he could refuel
we could refuel
you could refuel
they could refuel

V-ing form

I could be refuelling
you could be refuelling
he could be refuelling
we could be refuelling
you could be refuelling
they could be refuelling

Perfect

I could have refuelled
you could have refuelled
he could have refuelled
we could have refuelled
you could have refuelled
they could have refuelled

V-ing perfect

I could have been refuelling
you could have been refuelling
he could have been refuelling
we could have been refuelling
you could have been refuelling
they could have been refuelling

Negation

Simple form

I couldn't refuel
you couldn't refuel
he couldn't refuel
we couldn't refuel
you couldn't refuel
they couldn't refuel

V-ing form

I couldn't be refuelling
you couldn't be refuelling
he couldn't be refuelling
we couldn't be refuelling
you couldn't be refuelling
they couldn't be refuelling

Perfect

I couldn't have refuelled
you couldn't have refuelled
he couldn't have refuelled
we couldn't have refuelled
you couldn't have refuelled
they couldn't have refuelled

V-ing perfect

I couldn't have been refuelling
you couldn't have been refuelling
he couldn't have been refuelling
we couldn't have been refuelling
you couldn't have been refuelling
they couldn't have been refuelling

Interrogative form

Simple form

could I refuel?
could you refuel?
could he refuel?
could we refuel?
could you refuel?
could they refuel?

V-ing form

could I be refuelling?
could you be refuelling?
could he be refuelling?
could we be refuelling?
could you be refuelling?
could they be refuelling?

Perfect

could I have refuelled?
could you have refuelled?
could he have refuelled?
could we have refuelled?
could you have refuelled?
could they have refuelled?

V-ing perfect

could I have been refuelling?
could you have been refuelling?
could he have been refuelling?
could we have been refuelling?
could you have been refuelling?
could they have been refuelling?

Interro-negative form

Simple form

couldn't I refuel?
couldn't you refuel?
couldn't he refuel?
couldn't we refuel?
couldn't you refuel?
couldn't they refuel?

V-ing form

couldn't I be refuelling?
couldn't you be refuelling?
couldn't he be refuelling?
couldn't we be refuelling?
couldn't you be refuelling?
couldn't they be refuelling?

Perfect

couldn't I have refuelled?
couldn't you have refuelled?
couldn't he have refuelled?
couldn't we have refuelled?
couldn't you have refuelled?
couldn't they have refuelled?

V-ing perfect

couldn't I have been refuelling?
couldn't you have been refuelling?
couldn't he have been refuelling?
couldn't we have been refuelling?
couldn't you have been refuelling?
couldn't they have been refuelling?

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