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