I could land you could land he could land we could land you could land they could land
Forma con V-ing
I could be landing you could be landing he could be landing we could be landing you could be landing they could be landing
Perfecto
I could have landed you could have landed he could have landed we could have landed you could have landed they could have landed
Perfecto con V-ing
I could have been landing you could have been landing he could have been landing we could have been landing you could have been landing they could have been landing
Negación
Forma simple
I could not land you could not land he could not land we could not land you could not land they could not land
Forma con V-ing
I could not be landing you could not be landing he could not be landing we could not be landing you could not be landing they could not be landing
Perfecto
I could not have landed you could not have landed he could not have landed we could not have landed you could not have landed they could not have landed
Perfecto con V-ing
I could not have been landing you could not have been landing he could not have been landing we could not have been landing you could not have been landing they could not have been landing
Forma interrogativa
Forma simple
could I land? could you land? could he land? could we land? could you land? could they land?
Forma con V-ing
could I be landing? could you be landing? could he be landing? could we be landing? could you be landing? could they be landing?
Perfecto
could I have landed? could you have landed? could he have landed? could we have landed? could you have landed? could they have landed?
Perfecto con V-ing
could I have been landing? could you have been landing? could he have been landing? could we have been landing? could you have been landing? could they have been landing?
Forma interro-negativa
Forma simple
could I not land? could you not land? could he not land? could we not land? could you not land? could they not land?
Forma con V-ing
could I not be landing? could you not be landing? could he not be landing? could we not be landing? could you not be landing? could they not be landing?
Perfecto
could I not have landed? could you not have landed? could he not have landed? could we not have landed? could you not have landed? could they not have landed?
Perfecto con V-ing
could I not have been landing? could you not have been landing? could he not have been landing? could we not have been landing? could you not have been landing? could they not have been landing?