I could refill you could refill she could refill we could refill you could refill they could refill
Forma con V-ing
I could be refilling you could be refilling she could be refilling we could be refilling you could be refilling they could be refilling
Perfecto
I could have refilled you could have refilled she could have refilled we could have refilled you could have refilled they could have refilled
Perfecto con V-ing
I could have been refilling you could have been refilling she could have been refilling we could have been refilling you could have been refilling they could have been refilling
Negación
Forma simple
I couldn't refill you couldn't refill she couldn't refill we couldn't refill you couldn't refill they couldn't refill
Forma con V-ing
I couldn't be refilling you couldn't be refilling she couldn't be refilling we couldn't be refilling you couldn't be refilling they couldn't be refilling
Perfecto
I couldn't have refilled you couldn't have refilled she couldn't have refilled we couldn't have refilled you couldn't have refilled they couldn't have refilled
Perfecto con V-ing
I couldn't have been refilling you couldn't have been refilling she couldn't have been refilling we couldn't have been refilling you couldn't have been refilling they couldn't have been refilling
Forma interrogativa
Forma simple
could I refill? could you refill? could she refill? could we refill? could you refill? could they refill?
Forma con V-ing
could I be refilling? could you be refilling? could she be refilling? could we be refilling? could you be refilling? could they be refilling?
Perfecto
could I have refilled? could you have refilled? could she have refilled? could we have refilled? could you have refilled? could they have refilled?
Perfecto con V-ing
could I have been refilling? could you have been refilling? could she have been refilling? could we have been refilling? could you have been refilling? could they have been refilling?
Forma interro-negativa
Forma simple
couldn't I refill? couldn't you refill? couldn't she refill? couldn't we refill? couldn't you refill? couldn't they refill?
Forma con V-ing
couldn't I be refilling? couldn't you be refilling? couldn't she be refilling? couldn't we be refilling? couldn't you be refilling? couldn't they be refilling?
Perfecto
couldn't I have refilled? couldn't you have refilled? couldn't she have refilled? couldn't we have refilled? couldn't you have refilled? couldn't they have refilled?
Perfecto con V-ing
couldn't I have been refilling? couldn't you have been refilling? couldn't she have been refilling? couldn't we have been refilling? couldn't you have been refilling? couldn't they have been refilling?