I could besiege you could besiege he could besiege we could besiege you could besiege they could besiege
Forma con V-ing
I could be besieging you could be besieging he could be besieging we could be besieging you could be besieging they could be besieging
Perfecto
I could have besieged you could have besieged he could have besieged we could have besieged you could have besieged they could have besieged
Perfecto con V-ing
I could have been besieging you could have been besieging he could have been besieging we could have been besieging you could have been besieging they could have been besieging
Negación
Forma simple
I could not besiege you could not besiege he could not besiege we could not besiege you could not besiege they could not besiege
Forma con V-ing
I could not be besieging you could not be besieging he could not be besieging we could not be besieging you could not be besieging they could not be besieging
Perfecto
I could not have besieged you could not have besieged he could not have besieged we could not have besieged you could not have besieged they could not have besieged
Perfecto con V-ing
I could not have been besieging you could not have been besieging he could not have been besieging we could not have been besieging you could not have been besieging they could not have been besieging
Forma interrogativa
Forma simple
could I besiege? could you besiege? could he besiege? could we besiege? could you besiege? could they besiege?
Forma con V-ing
could I be besieging? could you be besieging? could he be besieging? could we be besieging? could you be besieging? could they be besieging?
Perfecto
could I have besieged? could you have besieged? could he have besieged? could we have besieged? could you have besieged? could they have besieged?
Perfecto con V-ing
could I have been besieging? could you have been besieging? could he have been besieging? could we have been besieging? could you have been besieging? could they have been besieging?
Forma interro-negativa
Forma simple
could I not besiege? could you not besiege? could he not besiege? could we not besiege? could you not besiege? could they not besiege?
Forma con V-ing
could I not be besieging? could you not be besieging? could he not be besieging? could we not be besieging? could you not be besieging? could they not be besieging?
Perfecto
could I not have besieged? could you not have besieged? could he not have besieged? could we not have besieged? could you not have besieged? could they not have besieged?
Perfecto con V-ing
could I not have been besieging? could you not have been besieging? could he not have been besieging? could we not have been besieging? could you not have been besieging? could they not have been besieging?