I could refuel you could refuel he could refuel we could refuel you could refuel they could refuel
Forma com V-ing
I could be refuelling you could be refuelling he could be refuelling we could be refuelling you could be refuelling they could be refuelling
Perfeito
I could have refuelled you could have refuelled he could have refuelled we could have refuelled you could have refuelled they could have refuelled
Perfeito com V-ing
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
Negação
Forma simple
I could not refuel you could not refuel he could not refuel we could not refuel you could not refuel they could not refuel
Forma com V-ing
I could not be refuelling you could not be refuelling he could not be refuelling we could not be refuelling you could not be refuelling they could not be refuelling
Perfeito
I could not have refuelled you could not have refuelled he could not have refuelled we could not have refuelled you could not have refuelled they could not have refuelled
Perfeito com V-ing
I could not have been refuelling you could not have been refuelling he could not have been refuelling we could not have been refuelling you could not have been refuelling they could not have been refuelling
Forma interrogativa
Forma simple
could I refuel? could you refuel? could he refuel? could we refuel? could you refuel? could they refuel?
Forma com V-ing
could I be refuelling? could you be refuelling? could he be refuelling? could we be refuelling? could you be refuelling? could they be refuelling?
Perfeito
could I have refuelled? could you have refuelled? could he have refuelled? could we have refuelled? could you have refuelled? could they have refuelled?
Perfeito com V-ing
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?
Forma interro-Negação
Forma simple
could I not refuel? could you not refuel? could he not refuel? could we not refuel? could you not refuel? could they not refuel?
Forma com V-ing
could I not be refuelling? could you not be refuelling? could he not be refuelling? could we not be refuelling? could you not be refuelling? could they not be refuelling?
Perfeito
could I not have refuelled? could you not have refuelled? could he not have refuelled? could we not have refuelled? could you not have refuelled? could they not have refuelled?
Perfeito com V-ing
could I not have been refuelling? could you not have been refuelling? could he not have been refuelling? could we not have been refuelling? could you not have been refuelling? could they not have been refuelling?