I could insert you could insert he could insert we could insert you could insert they could insert
Forma con V-ing
I could be inserting you could be inserting he could be inserting we could be inserting you could be inserting they could be inserting
Perfecto
I could have inserted you could have inserted he could have inserted we could have inserted you could have inserted they could have inserted
Perfecto con V-ing
I could have been inserting you could have been inserting he could have been inserting we could have been inserting you could have been inserting they could have been inserting
Negación
Forma simple
I couldn't insert you couldn't insert he couldn't insert we couldn't insert you couldn't insert they couldn't insert
Forma con V-ing
I couldn't be inserting you couldn't be inserting he couldn't be inserting we couldn't be inserting you couldn't be inserting they couldn't be inserting
Perfecto
I couldn't have inserted you couldn't have inserted he couldn't have inserted we couldn't have inserted you couldn't have inserted they couldn't have inserted
Perfecto con V-ing
I couldn't have been inserting you couldn't have been inserting he couldn't have been inserting we couldn't have been inserting you couldn't have been inserting they couldn't have been inserting
Forma interrogativa
Forma simple
could I insert? could you insert? could he insert? could we insert? could you insert? could they insert?
Forma con V-ing
could I be inserting? could you be inserting? could he be inserting? could we be inserting? could you be inserting? could they be inserting?
Perfecto
could I have inserted? could you have inserted? could he have inserted? could we have inserted? could you have inserted? could they have inserted?
Perfecto con V-ing
could I have been inserting? could you have been inserting? could he have been inserting? could we have been inserting? could you have been inserting? could they have been inserting?
Forma interro-negativa
Forma simple
couldn't I insert? couldn't you insert? couldn't he insert? couldn't we insert? couldn't you insert? couldn't they insert?
Forma con V-ing
couldn't I be inserting? couldn't you be inserting? couldn't he be inserting? couldn't we be inserting? couldn't you be inserting? couldn't they be inserting?
Perfecto
couldn't I have inserted? couldn't you have inserted? couldn't he have inserted? couldn't we have inserted? couldn't you have inserted? couldn't they have inserted?
Perfecto con V-ing
couldn't I have been inserting? couldn't you have been inserting? couldn't he have been inserting? couldn't we have been inserting? couldn't you have been inserting? couldn't they have been inserting?