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