I could gravel you could gravel he could gravel we could gravel you could gravel they could gravel
Forma con V-ing
I could be gravelling you could be gravelling he could be gravelling we could be gravelling you could be gravelling they could be gravelling
Perfecto
I could have gravelled you could have gravelled he could have gravelled we could have gravelled you could have gravelled they could have gravelled
Perfecto con V-ing
I could have been gravelling you could have been gravelling he could have been gravelling we could have been gravelling you could have been gravelling they could have been gravelling
Negación
Forma simple
I could not gravel you could not gravel he could not gravel we could not gravel you could not gravel they could not gravel
Forma con V-ing
I could not be gravelling you could not be gravelling he could not be gravelling we could not be gravelling you could not be gravelling they could not be gravelling
Perfecto
I could not have gravelled you could not have gravelled he could not have gravelled we could not have gravelled you could not have gravelled they could not have gravelled
Perfecto con V-ing
I could not have been gravelling you could not have been gravelling he could not have been gravelling we could not have been gravelling you could not have been gravelling they could not have been gravelling
Forma interrogativa
Forma simple
could I gravel? could you gravel? could he gravel? could we gravel? could you gravel? could they gravel?
Forma con V-ing
could I be gravelling? could you be gravelling? could he be gravelling? could we be gravelling? could you be gravelling? could they be gravelling?
Perfecto
could I have gravelled? could you have gravelled? could he have gravelled? could we have gravelled? could you have gravelled? could they have gravelled?
Perfecto con V-ing
could I have been gravelling? could you have been gravelling? could he have been gravelling? could we have been gravelling? could you have been gravelling? could they have been gravelling?
Forma interro-negativa
Forma simple
could I not gravel? could you not gravel? could he not gravel? could we not gravel? could you not gravel? could they not gravel?
Forma con V-ing
could I not be gravelling? could you not be gravelling? could he not be gravelling? could we not be gravelling? could you not be gravelling? could they not be gravelling?
Perfecto
could I not have gravelled? could you not have gravelled? could he not have gravelled? could we not have gravelled? could you not have gravelled? could they not have gravelled?
Perfecto con V-ing
could I not have been gravelling? could you not have been gravelling? could he not have been gravelling? could we not have been gravelling? could you not have been gravelling? could they not have been gravelling?