I could leister you could leister he could leister we could leister you could leister they could leister
Forma con V-ing
I could be leistering you could be leistering he could be leistering we could be leistering you could be leistering they could be leistering
Perfecto
I could have leistered you could have leistered he could have leistered we could have leistered you could have leistered they could have leistered
Perfecto con V-ing
I could have been leistering you could have been leistering he could have been leistering we could have been leistering you could have been leistering they could have been leistering
Negación
Forma simple
I could not leister you could not leister he could not leister we could not leister you could not leister they could not leister
Forma con V-ing
I could not be leistering you could not be leistering he could not be leistering we could not be leistering you could not be leistering they could not be leistering
Perfecto
I could not have leistered you could not have leistered he could not have leistered we could not have leistered you could not have leistered they could not have leistered
Perfecto con V-ing
I could not have been leistering you could not have been leistering he could not have been leistering we could not have been leistering you could not have been leistering they could not have been leistering
Forma interrogativa
Forma simple
could I leister? could you leister? could he leister? could we leister? could you leister? could they leister?
Forma con V-ing
could I be leistering? could you be leistering? could he be leistering? could we be leistering? could you be leistering? could they be leistering?
Perfecto
could I have leistered? could you have leistered? could he have leistered? could we have leistered? could you have leistered? could they have leistered?
Perfecto con V-ing
could I have been leistering? could you have been leistering? could he have been leistering? could we have been leistering? could you have been leistering? could they have been leistering?
Forma interro-negativa
Forma simple
could I not leister? could you not leister? could he not leister? could we not leister? could you not leister? could they not leister?
Forma con V-ing
could I not be leistering? could you not be leistering? could he not be leistering? could we not be leistering? could you not be leistering? could they not be leistering?
Perfecto
could I not have leistered? could you not have leistered? could he not have leistered? could we not have leistered? could you not have leistered? could they not have leistered?
Perfecto con V-ing
could I not have been leistering? could you not have been leistering? could he not have been leistering? could we not have been leistering? could you not have been leistering? could they not have been leistering?